SLING-7846 Provide a NIO.2 file system implementation for JCR
authorOliver Lietz <olli@apache.org>
Wed, 22 Aug 2018 21:06:56 +0000 (23:06 +0200)
committerOliver Lietz <olli@apache.org>
Wed, 22 Aug 2018 21:06:56 +0000 (23:06 +0200)
22 files changed:
.gitignore [new file with mode: 0644]
.sling-module.xml [new file with mode: 0644]
LICENSE [new file with mode: 0644]
README.md [new file with mode: 0644]
bnd.bnd [new file with mode: 0644]
pom.xml [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/JcrFileSupportService.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/DefaultJcrFileSupportService.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/DefaultJcrFileSupportServiceConfiguration.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrDirectoryStream.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFile.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileAttributes.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileChannel.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileStore.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileSystem.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileSystemProvider.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/JcrPath.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/internal/PathUtil.java [new file with mode: 0644]
src/main/java/org/apache/sling/commons/jcr/file/package-info.java [new file with mode: 0644]
src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileIT.java [new file with mode: 0644]
src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileSystemProviderIT.java [new file with mode: 0644]
src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileTestSupport.java [new file with mode: 0644]

diff --git a/.gitignore b/.gitignore
new file mode 100644 (file)
index 0000000..5b783ed
--- /dev/null
@@ -0,0 +1,17 @@
+/target
+.idea
+.classpath
+.metadata
+.project
+.settings
+.externalToolBuilders
+maven-eclipse.xml
+*.swp
+*.iml
+*.ipr
+*.iws
+*.bak
+.vlt
+.DS_Store
+jcr.log
+atlassian-ide-plugin.xml
diff --git a/.sling-module.xml b/.sling-module.xml
new file mode 100644 (file)
index 0000000..a402095
--- /dev/null
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
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+<sling-module>
+  <jenkins>
+    <enabled>false</enabled>
+  </jenkins>
+</sling-module>
diff --git a/LICENSE b/LICENSE
new file mode 100644 (file)
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
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diff --git a/README.md b/README.md
new file mode 100644 (file)
index 0000000..6dcbfa4
--- /dev/null
+++ b/README.md
@@ -0,0 +1,20 @@
+# Apache Sling Commons JCR File
+
+This module is part of the [Apache Sling](https://sling.apache.org) project.
+
+This module provides a basic NIO.2 file system implementation for JCR.
+
+## JCR File System Properties
+
+| Property Name (of Type `java.lang.String`) | Allowed Values | Property Description |
+| ---- | ---- | ---- |
+| `javax.jcr.Session` | a valid (_live_) `Session` | Session which is used to access (read/write) the JCR |
+
+## Limitations
+
+* Getting an existing `FileSystem` or `Path` via `URI` (`FileSystemProvider#getFileSystem(URI):FileSystem`) is not supported due to underlying JCR `Session`s from environments (`env`).
+* Getting total space, free space and usable space always returns `Long.MAX_VALUE`
+
+## Notes
+
+* Most classes in this module log errors **and** throw exceptions afterwards due to the sparingly used logging in MINA's SFTP subsystem.
diff --git a/bnd.bnd b/bnd.bnd
new file mode 100644 (file)
index 0000000..e36a0d6
--- /dev/null
+++ b/bnd.bnd
@@ -0,0 +1,3 @@
+-removeheaders:\
+  Include-Resource,\
+  Private-Package
diff --git a/pom.xml b/pom.xml
new file mode 100644 (file)
index 0000000..0fb0daa
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,211 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.sling</groupId>
+    <artifactId>sling</artifactId>
+    <version>34</version>
+    <relativePath/>
+  </parent>
+
+  <artifactId>org.apache.sling.commons.jcr.file</artifactId>
+  <version>1.0.0-SNAPSHOT</version>
+
+  <name>Apache Sling Commons JCR File</name>
+  <description>NIO.2 file system implementation for JCR</description>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+    <sling.java.version>8</sling.java.version>
+    <org.ops4j.pax.exam.version>4.12.0</org.ops4j.pax.exam.version>
+  </properties>
+
+  <scm>
+    <connection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-commons-jcr-file.git</connection>
+    <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-commons-jcr-file.git</developerConnection>
+    <url>https://gitbox.apache.org/repos/asf?p=sling-org-apache-sling-commons-jcr-file.git</url>
+  </scm>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>biz.aQute.bnd</groupId>
+        <artifactId>bnd-maven-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>biz.aQute.bnd</groupId>
+        <artifactId>bnd-baseline-maven-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-failsafe-plugin</artifactId>
+        <executions>
+          <execution>
+            <goals>
+              <goal>integration-test</goal>
+              <goal>verify</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <redirectTestOutputToFile>true</redirectTestOutputToFile>
+          <systemProperties>
+            <property>
+              <name>bundle.filename</name>
+              <value>${basedir}/target/${project.build.finalName}.jar</value>
+            </property>
+          </systemProperties>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.servicemix.tooling</groupId>
+        <artifactId>depends-maven-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.sling</groupId>
+        <artifactId>maven-sling-plugin</artifactId>
+        <configuration>
+          <slingUrl>http://localhost:8181/system/console</slingUrl>
+          <user>karaf</user>
+          <password>karaf</password>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+  <dependencies>
+    <!-- javax -->
+    <dependency>
+      <groupId>javax.inject</groupId>
+      <artifactId>javax.inject</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>javax.jcr</groupId>
+      <artifactId>jcr</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <!-- OSGi -->
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>org.osgi.annotation.versioning</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>osgi.cmpn</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>osgi.core</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>org.osgi.service.component.annotations</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>org.osgi.service.metatype.annotations</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <!-- Apache Felix -->
+    <dependency>
+      <groupId>org.apache.felix</groupId>
+      <artifactId>org.apache.felix.framework</artifactId>
+      <version>5.6.10</version>
+      <scope>test</scope>
+    </dependency>
+    <!-- Apache Sling -->
+    <dependency>
+      <groupId>org.apache.sling</groupId>
+      <artifactId>org.apache.sling.resource.presence</artifactId>
+      <version>0.0.2</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.sling</groupId>
+      <artifactId>org.apache.sling.testing.paxexam</artifactId>
+      <version>2.0.0</version>
+      <scope>test</scope>
+    </dependency>
+    <!-- nullability -->
+    <dependency>
+      <groupId>org.jetbrains</groupId>
+      <artifactId>annotations</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <!-- logging -->
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <!-- testing -->
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicemix.bundles</groupId>
+      <artifactId>org.apache.servicemix.bundles.hamcrest</artifactId>
+      <version>1.3_1</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.ops4j.pax.exam</groupId>
+      <artifactId>pax-exam</artifactId>
+      <version>${org.ops4j.pax.exam.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.ops4j.pax.exam</groupId>
+      <artifactId>pax-exam-cm</artifactId>
+      <version>${org.ops4j.pax.exam.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.ops4j.pax.exam</groupId>
+      <artifactId>pax-exam-container-forked</artifactId>
+      <version>${org.ops4j.pax.exam.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.ops4j.pax.exam</groupId>
+      <artifactId>pax-exam-junit4</artifactId>
+      <version>${org.ops4j.pax.exam.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.ops4j.pax.exam</groupId>
+      <artifactId>pax-exam-link-mvn</artifactId>
+      <version>${org.ops4j.pax.exam.version}</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+</project>
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/JcrFileSupportService.java b/src/main/java/org/apache/sling/commons/jcr/file/JcrFileSupportService.java
new file mode 100644 (file)
index 0000000..17207b3
--- /dev/null
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.jetbrains.annotations.NotNull;
+import org.osgi.annotation.versioning.ProviderType;
+
+@ProviderType
+public interface JcrFileSupportService {
+
+    boolean isFile(@NotNull final Node node) throws RepositoryException;
+
+    boolean isDirectory(@NotNull final Node node) throws RepositoryException;
+
+    @NotNull
+    BasicFileAttributes fromPath(@NotNull final Path path) throws IOException;
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/DefaultJcrFileSupportService.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/DefaultJcrFileSupportService.java
new file mode 100644 (file)
index 0000000..9398ab8
--- /dev/null
@@ -0,0 +1,139 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.attribute.FileTime;
+import java.util.Calendar;
+
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+
+import org.apache.sling.commons.jcr.file.JcrFileSupportService;
+import org.jetbrains.annotations.NotNull;
+import org.osgi.framework.Constants;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Modified;
+import org.osgi.service.metatype.annotations.Designate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@Component(
+    property = {
+        Constants.SERVICE_DESCRIPTION + "=Apache Sling Commons JCR File Support Service",
+        Constants.SERVICE_VENDOR + "=The Apache Software Foundation"
+    }
+)
+@Designate(
+    ocd = DefaultJcrFileSupportServiceConfiguration.class
+)
+public class DefaultJcrFileSupportService implements JcrFileSupportService {
+
+    private DefaultJcrFileSupportServiceConfiguration configuration;
+
+    private final Logger logger = LoggerFactory.getLogger(DefaultJcrFileSupportService.class);
+
+    public DefaultJcrFileSupportService() {
+    }
+
+    @Activate
+    public void activate(final DefaultJcrFileSupportServiceConfiguration configuration) {
+        this.configuration = configuration;
+    }
+
+    @Modified
+    public void modified(final DefaultJcrFileSupportServiceConfiguration configuration) {
+        this.configuration = configuration;
+    }
+
+    @Deactivate
+    public void deactivate() {
+        this.configuration = null;
+    }
+
+    public boolean isFile(@NotNull final Node node) throws RepositoryException {
+        for (final String type : configuration.file_node_types()) {
+            if (node.isNodeType(type)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public boolean isDirectory(@NotNull final Node node) throws RepositoryException {
+        for (final String type : configuration.directory_node_types()) {
+            if (node.isNodeType(type)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @NotNull
+    public JcrFileAttributes fromPath(@NotNull final Path path) throws IOException {
+        try {
+            final JcrFileSystem fileSystem = (JcrFileSystem) path.getFileSystem();
+            final Session session = fileSystem.getSession();
+            final Node node = session.getNode(path.toString());
+            final FileTime lastModifiedTime = timeFromProperty(node, "jcr:lastModified");
+            final FileTime lastAccessTime = FileTime.fromMillis(0L);
+            final FileTime creationTime = timeFromProperty(node, "jcr:created");
+            final boolean isRegularFile = isFile(node);
+            final boolean isDirectory = isDirectory(node);
+            final boolean isSymbolicLink = false;
+            final boolean isOther = !isRegularFile && !isDirectory;
+            final long size;
+            if (isRegularFile) {
+                size = lengthOfFileContent(node);
+            } else {
+                size = 0;
+            }
+            final JcrFileAttributes jcrFileAttributes = new JcrFileAttributes(lastModifiedTime, lastAccessTime, creationTime, isRegularFile, isDirectory, isSymbolicLink, isOther, size);
+            logger.info("from path {}: ", jcrFileAttributes);
+            return jcrFileAttributes;
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new IOException(e);
+        }
+    }
+
+    private static FileTime timeFromProperty(final Node node, final String name) {
+        try {
+            final Property property = node.getProperty(name);
+            final Calendar date = property.getDate();
+            return FileTime.fromMillis(date.getTimeInMillis());
+        } catch (Exception e) {
+            return FileTime.fromMillis(0L);
+        }
+    }
+
+    private long lengthOfFileContent(final Node node) {
+        try {
+            return node.getNode("jcr:content").getProperty("jcr:data").getLength();
+        } catch (Exception e) {
+            return -1L;
+        }
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/DefaultJcrFileSupportServiceConfiguration.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/DefaultJcrFileSupportServiceConfiguration.java
new file mode 100644 (file)
index 0000000..23d2e9f
--- /dev/null
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import org.osgi.service.metatype.annotations.AttributeDefinition;
+import org.osgi.service.metatype.annotations.ObjectClassDefinition;
+
+@ObjectClassDefinition(
+    name = "Apache Sling Commons JCR File Support Service",
+    description = "Provides support for JCR File tasks"
+)
+@interface DefaultJcrFileSupportServiceConfiguration {
+
+    @AttributeDefinition(
+        name = "service ranking",
+        description = "service ranking"
+    )
+    int service_ranking() default 0;
+
+    @AttributeDefinition(
+        name = "file node type",
+        description = "node type used for new files"
+    )
+    String file_node_type() default "nt:file";
+
+    @AttributeDefinition(
+        name = "directory node typ",
+        description = "node type used for new directories"
+    )
+    String directory_node_type() default "nt:folder";
+
+    @AttributeDefinition(
+        name = "file node types",
+        description = "file node types"
+    )
+    String[] file_node_types() default {"nt:file"};
+
+    @AttributeDefinition(
+        name = "directory node types",
+        description = "directory node types"
+    )
+    String[] directory_node_types() default {"rep:root", "nt:folder", "sling:Folder"};
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrDirectoryStream.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrDirectoryStream.java
new file mode 100644 (file)
index 0000000..337242e
--- /dev/null
@@ -0,0 +1,116 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.IOException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.NotDirectoryException;
+import java.nio.file.Path;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.RepositoryException;
+
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class JcrDirectoryStream implements DirectoryStream<Path> {
+
+    private final JcrPath directory;
+
+    private final JcrFileSystem fileSystem;
+
+    private final DirectoryStream.Filter<? super Path> filter; // TODO
+
+    private final Node node;
+
+    private final Logger logger = LoggerFactory.getLogger(JcrDirectoryStream.class);
+
+    // TODO take filter into account
+    JcrDirectoryStream(@NotNull final JcrPath directory, final Filter<? super Path> filter) throws NotDirectoryException {
+        this.directory = directory;
+        this.filter = filter;
+        final String path = directory.toString();
+        try {
+            fileSystem = (JcrFileSystem) directory.getFileSystem();
+            node = fileSystem.getSession().getNode(path);
+            logger.info("node: {} {}", node.getPath(), node.getPrimaryNodeType().getName());
+            if (!fileSystem.provider().isDirectory(node)) {
+                logger.error("{} is not a directory", path);
+                throw new NotDirectoryException(path);
+            }
+        } catch (RepositoryException e) {
+            logger.error(e.getMessage(), e);
+            throw new RuntimeException("Error reading from path " + path);
+        }
+    }
+
+    @Override
+    @NotNull
+    public Iterator<Path> iterator() {
+        logger.info("iterator for {}", directory);
+
+        final Set<String> paths = new HashSet<>();
+
+        try {
+            final NodeIterator nodes = node.getNodes();
+            while (nodes.hasNext()) {
+                final Node node = nodes.nextNode();
+                if (fileSystem.provider().isDirectory(node) || fileSystem.provider().isFile(node)) {
+                    final String path = node.getPath();
+                    paths.add(path);
+                    logger.info("node {} added", path);
+                }
+            }
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+        }
+
+        return new Iterator<Path>() {
+
+            final Iterator<String> iterator = paths.iterator();
+
+            @Override
+            public boolean hasNext() {
+                return iterator.hasNext();
+            }
+
+            @Override
+            public Path next() {
+                return new JcrPath(fileSystem, iterator.next());
+            }
+
+            @Override
+            public void remove() {
+                throw new UnsupportedOperationException();
+            }
+
+        };
+
+    }
+
+    @Override
+    public void close() throws IOException {
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFile.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFile.java
new file mode 100644 (file)
index 0000000..76dbf18
--- /dev/null
@@ -0,0 +1,394 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.File;
+import java.io.FileFilter;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.nio.file.Path;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class JcrFile extends File {
+
+    private final String path;
+
+    private final JcrFileSystem fileSystem;
+
+    private final Logger logger = LoggerFactory.getLogger(JcrFile.class);
+
+    JcrFile(@NotNull final JcrFileSystem fileSystem, @NotNull String pathname) {
+        super(pathname);
+        this.fileSystem = fileSystem;
+        this.path = PathUtil.normalize(pathname); // TODO
+    }
+
+    @Override
+    @NotNull
+    public String getName() {
+        logger.info("getting name for {}", path);
+        return PathUtil.getName(path);
+    }
+
+    @Override
+    public String getParent() {
+        logger.info("getting parent for {}", path);
+        return PathUtil.getParent(path);
+    }
+
+    @Override
+    public File getParentFile() {
+        logger.info("getting parent file for {}", path);
+        final String path = PathUtil.getParent(this.path);
+        if (path != null) {
+            return new JcrFile(fileSystem, path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public String getPath() {
+        logger.info("getting path {}", path);
+        return path;
+    }
+
+    @Override
+    public boolean isAbsolute() {
+        logger.info("is absolute {}", path);
+        return PathUtil.isAbsolute(path);
+    }
+
+    // TODO
+    @Override
+    @NotNull
+    public String getAbsolutePath() {
+        logger.info("getting absolute path {}", path);
+        throw new UnsupportedOperationException("getAbsolutePath");
+    }
+
+    @Override
+    @NotNull
+    public File getAbsoluteFile() {
+        logger.info("getting absolute file for {}", path);
+        return new JcrFile(fileSystem, getAbsolutePath());
+    }
+
+    // TODO
+    @Override
+    @NotNull
+    public String getCanonicalPath() throws IOException {
+        logger.info("getCanonicalPath");
+        throw new UnsupportedOperationException("getCanonicalPath");
+    }
+
+    // TODO
+    @Override
+    @NotNull
+    public File getCanonicalFile() throws IOException {
+        logger.info("getCanonicalFile");
+        throw new UnsupportedOperationException("getCanonicalFile");
+    }
+
+    // TODO
+    @Override
+    public URL toURL() throws MalformedURLException {
+        logger.info("toURL");
+        throw new UnsupportedOperationException("toURL");
+    }
+
+    // TODO
+    @Override
+    @NotNull
+    public URI toURI() {
+        logger.info("toURI");
+        throw new UnsupportedOperationException("toURI");
+    }
+
+    // TODO
+    @Override
+    public boolean canRead() {
+        logger.info("canRead");
+        return true;
+    }
+
+    // TODO
+    @Override
+    public boolean canWrite() {
+        logger.info("canWrite");
+        return true;
+    }
+
+    // TODO
+    @Override
+    public boolean exists() {
+        logger.info("exists");
+        return true;
+    }
+
+    @Override
+    public boolean isDirectory() {
+        logger.info("is directory {}", path);
+        try {
+            return fileSystem.provider().isDirectory(getNode());
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public boolean isFile() {
+        logger.info("is file {}", path);
+        try {
+            return fileSystem.provider().isFile(getNode());
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    // TODO
+    @Override
+    public boolean isHidden() {
+        logger.info("isHidden");
+        return false;
+    }
+
+    // TODO
+    @Override
+    public long lastModified() {
+        logger.info("lastModified");
+        throw new UnsupportedOperationException("lastModified");
+    }
+
+    // TODO
+    @Override
+    public long length() {
+        logger.info("length");
+        throw new UnsupportedOperationException("length");
+    }
+
+    // TODO
+    @Override
+    public boolean createNewFile() throws IOException {
+        logger.info("createNewFile");
+        throw new UnsupportedOperationException("createNewFile");
+    }
+
+    // TODO
+    @Override
+    public boolean delete() {
+        logger.info("delete");
+        throw new UnsupportedOperationException("delete");
+    }
+
+    // TODO
+    @Override
+    public void deleteOnExit() {
+        logger.info("deleteOnExit");
+        throw new UnsupportedOperationException("deleteOnExit");
+    }
+
+    // TODO
+    @Override
+    public String[] list() {
+        logger.info("list");
+        throw new UnsupportedOperationException("list");
+    }
+
+    // TODO
+    @Override
+    public String[] list(FilenameFilter filter) {
+        logger.info("list");
+        throw new UnsupportedOperationException("list");
+    }
+
+    // TODO
+    @Override
+    public File[] listFiles() {
+        logger.info("listFiles");
+        throw new UnsupportedOperationException("listFiles");
+    }
+
+    // TODO
+    @Override
+    public File[] listFiles(FilenameFilter filter) {
+        logger.info("listFiles");
+        throw new UnsupportedOperationException("listFiles");
+    }
+
+    // TODO
+    @Override
+    public File[] listFiles(FileFilter filter) {
+        logger.info("listFiles");
+        throw new UnsupportedOperationException("listFiles");
+    }
+
+    // TODO
+    @Override
+    public boolean mkdir() {
+        logger.info("mkdir");
+        throw new UnsupportedOperationException("mkdir");
+    }
+
+    // TODO
+    @Override
+    public boolean mkdirs() {
+        logger.info("mkdirs");
+        throw new UnsupportedOperationException("mkdirs");
+    }
+
+    // TODO
+    @Override
+    public boolean renameTo(File dest) {
+        logger.info("renameTo");
+        throw new UnsupportedOperationException("renameTo");
+    }
+
+    // TODO
+    @Override
+    public boolean setLastModified(long time) {
+        logger.info("setLastModified");
+        throw new UnsupportedOperationException("setLastModified");
+    }
+
+    // TODO
+    @Override
+    public boolean setReadOnly() {
+        logger.info("setReadOnly");
+        throw new UnsupportedOperationException("setReadOnly");
+    }
+
+    // TODO
+    @Override
+    public boolean setWritable(boolean writable, boolean ownerOnly) {
+        logger.info("setWritable");
+        throw new UnsupportedOperationException("setWritable");
+    }
+
+    // TODO
+    @Override
+    public boolean setWritable(boolean writable) {
+        logger.info("setWritable");
+        throw new UnsupportedOperationException("setWritable");
+    }
+
+    // TODO
+    @Override
+    public boolean setReadable(boolean readable, boolean ownerOnly) {
+        logger.info("setReadable");
+        throw new UnsupportedOperationException("setReadable");
+    }
+
+    // TODO
+    @Override
+    public boolean setReadable(boolean readable) {
+        logger.info("setReadable");
+        throw new UnsupportedOperationException("setReadable");
+    }
+
+    // TODO
+    @Override
+    public boolean setExecutable(boolean executable, boolean ownerOnly) {
+        logger.info("setExecutable");
+        throw new UnsupportedOperationException("setExecutable");
+    }
+
+    // TODO
+    @Override
+    public boolean setExecutable(boolean executable) {
+        logger.info("setExecutable");
+        throw new UnsupportedOperationException("setExecutable");
+    }
+
+    // TODO
+    @Override
+    public boolean canExecute() {
+        logger.info("canExecute");
+        return false;
+    }
+
+    @Override
+    public long getTotalSpace() {
+        logger.info("getting total space ({})", path);
+        return Long.MAX_VALUE;
+    }
+
+    @Override
+    public long getFreeSpace() {
+        logger.info("getting free space ({})", path);
+        return Long.MAX_VALUE;
+    }
+
+    @Override
+    public long getUsableSpace() {
+        logger.info("getting usable space ({})", path);
+        return Long.MAX_VALUE;
+    }
+
+    // TODO
+    @Override
+    public int compareTo(final File pathname) {
+        logger.info("compareTo");
+        return path.compareTo(pathname.getPath());
+    }
+
+    // TODO
+    @Override
+    public boolean equals(final Object obj) {
+        logger.info("equals");
+        if ((obj != null) && (obj instanceof JcrFile)) {
+            return compareTo((JcrFile) obj) == 0;
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        logger.info("hash code ({})", path);
+        return path.hashCode() ^ 1234321;
+    }
+
+    @Override
+    public String toString() {
+        logger.info("to string ({})", path);
+        return path;
+    }
+
+    @Override
+    @NotNull
+    public Path toPath() {
+        logger.info("to path ({})", path);
+        return new JcrPath(fileSystem, path);
+    }
+
+    Node getNode() throws RepositoryException {
+        return fileSystem.getSession().getNode(path);
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileAttributes.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileAttributes.java
new file mode 100644 (file)
index 0000000..a508ffd
--- /dev/null
@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileTime;
+
+public class JcrFileAttributes implements BasicFileAttributes {
+
+    private final FileTime lastModifiedTime;
+
+    private final FileTime lastAccessTime;
+
+    private final FileTime creationTime;
+
+    private final boolean isRegularFile;
+
+    private final boolean isDirectory;
+
+    private final boolean isSymbolicLink;
+
+    private final boolean isOther;
+
+    private final long size;
+
+    JcrFileAttributes(final FileTime lastModifiedTime, final FileTime lastAccessTime, final FileTime creationTime, final boolean isRegularFile, final boolean isDirectory, final boolean isSymbolicLink, final boolean isOther, final long size) {
+        this.lastModifiedTime = lastModifiedTime;
+        this.lastAccessTime = lastAccessTime;
+        this.creationTime = creationTime;
+        this.isRegularFile = isRegularFile;
+        this.isDirectory = isDirectory;
+        this.isSymbolicLink = isSymbolicLink;
+        this.isOther = isOther;
+        this.size = size;
+    }
+
+    @Override
+    public FileTime lastModifiedTime() {
+        return lastModifiedTime;
+    }
+
+    @Override
+    public FileTime lastAccessTime() {
+        return lastAccessTime;
+    }
+
+    @Override
+    public FileTime creationTime() {
+        return creationTime;
+    }
+
+    @Override
+    public boolean isRegularFile() {
+        return isRegularFile;
+    }
+
+    @Override
+    public boolean isDirectory() {
+        return isDirectory;
+    }
+
+    @Override
+    public boolean isSymbolicLink() {
+        return isSymbolicLink;
+    }
+
+    @Override
+    public boolean isOther() {
+        return isOther;
+    }
+
+    @Override
+    public long size() {
+        return size;
+    }
+
+    @Override
+    public Object fileKey() {
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileChannel.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileChannel.java
new file mode 100644 (file)
index 0000000..9f8e7dd
--- /dev/null
@@ -0,0 +1,189 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
+
+import javax.jcr.Binary;
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * https://wiki.apache.org/jackrabbit/JCR%20Binary%20Usecase
+ */
+public class JcrFileChannel extends FileChannel {
+
+    private long position;
+
+    private final Node node;
+
+    private final Logger logger = LoggerFactory.getLogger(JcrFileChannel.class);
+
+    JcrFileChannel(final Node node) throws RepositoryException {
+        logger.info("JcrFileChannel: {}", node.getPath());
+        this.node = node;
+    }
+
+    private Binary binary() throws RepositoryException {
+        return node.getNode("jcr:content").getProperty("jcr:data").getBinary();
+    }
+
+    // TODO
+    @Override
+    public int read(ByteBuffer dst) throws IOException {
+        logger.info("read");
+        /*
+        try {
+            int read = binary().read(dst.array(), position);
+            position = position + read;
+            logger.info("read {} bytes into array of length {}, new position is {}", read, dst.array().length, position);
+            return read;
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new IOException(e);
+        }
+        */
+        return 0;
+    }
+
+    // TODO
+    @Override
+    public long read(ByteBuffer[] dsts, int offset, int length) throws IOException {
+        logger.info("read {} {}", offset, length);
+        return 0;
+    }
+
+    // TODO
+    @Override
+    public int write(ByteBuffer src) throws IOException {
+        logger.info("write");
+        return 0;
+    }
+
+    // TODO
+    @Override
+    public long write(ByteBuffer[] srcs, int offset, int length) throws IOException {
+        logger.info("write {} {}", offset, length);
+        return 0;
+    }
+
+    @Override
+    public long position() throws IOException {
+        logger.info("position: {}", position);
+        return position;
+    }
+
+    // TODO
+    @Override
+    public FileChannel position(long newPosition) throws IOException {
+        logger.info("setting position ({}) to new position {}", position, newPosition);
+        this.position = newPosition;
+        return this;
+    }
+
+    // TODO
+    @Override
+    public long size() throws IOException {
+        logger.info("size");
+        try {
+            return binary().getSize();
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+            throw new IOException(e);
+        }
+    }
+
+    // TODO
+    @Override
+    public FileChannel truncate(long size) throws IOException {
+        logger.info("truncate", size);
+        return this;
+    }
+
+    // TODO
+    @Override
+    public void force(boolean metaData) throws IOException {
+        logger.info("force {}", metaData);
+    }
+
+    // TODO
+    @Override
+    public long transferTo(long position, long count, WritableByteChannel target) throws IOException {
+        logger.info("transferTo {} {}", position, count);
+        return 0;
+    }
+
+    // TODO
+    @Override
+    public long transferFrom(ReadableByteChannel src, long position, long count) throws IOException {
+        logger.info("transferFrom {} {}", position, count);
+        return 0;
+    }
+
+    // TODO
+    @Override
+    public int read(ByteBuffer dst, long position) throws IOException {
+        logger.info("read {}", position);
+        return 0;
+    }
+
+    // TODO
+    @Override
+    public int write(ByteBuffer src, long position) throws IOException {
+        logger.info("write {}", position);
+        return 0;
+    }
+
+    // TODO
+    @Override
+    public MappedByteBuffer map(MapMode mode, long position, long size) throws IOException {
+        logger.info("map {} {}", position, size);
+        return null;
+    }
+
+    // TODO
+    @Override
+    public FileLock lock(long position, long size, boolean shared) throws IOException {
+        logger.info("lock {} {} {}", position, size, shared);
+        return null;
+    }
+
+    // TODO
+    @Override
+    public FileLock tryLock(long position, long size, boolean shared) throws IOException {
+        logger.info("tryLock {} {} {}", position, size, shared);
+        return null;
+    }
+
+    // TODO
+    @Override
+    protected void implCloseChannel() throws IOException {
+        logger.info("implCloseChannel");
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileStore.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileStore.java
new file mode 100644 (file)
index 0000000..a99206e
--- /dev/null
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.IOException;
+import java.nio.file.FileStore;
+import java.nio.file.attribute.FileAttributeView;
+import java.nio.file.attribute.FileStoreAttributeView;
+
+public class JcrFileStore extends FileStore {
+
+    // TODO
+    @Override
+    public String name() {
+        return null;
+    }
+
+    @Override
+    public String type() {
+        return "jcr";
+    }
+
+    @Override
+    public boolean isReadOnly() {
+        return false;
+    }
+
+    @Override
+    public long getTotalSpace() throws IOException {
+        return Long.MAX_VALUE;
+    }
+
+    @Override
+    public long getUsableSpace() throws IOException {
+        return Long.MAX_VALUE;
+    }
+
+    @Override
+    public long getUnallocatedSpace() throws IOException {
+        return Long.MAX_VALUE;
+    }
+
+    @Override
+    public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
+        return false;
+    }
+
+    @Override
+    public boolean supportsFileAttributeView(String name) {
+        return false;
+    }
+
+    @Override
+    public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
+        return null;
+    }
+
+    @Override
+    public Object getAttribute(String attribute) throws IOException {
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileSystem.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileSystem.java
new file mode 100644 (file)
index 0000000..722f8c3
--- /dev/null
@@ -0,0 +1,139 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.IOException;
+import java.net.URI;
+import java.nio.file.FileStore;
+import java.nio.file.FileSystem;
+import java.nio.file.Path;
+import java.nio.file.PathMatcher;
+import java.nio.file.WatchService;
+import java.nio.file.attribute.UserPrincipalLookupService;
+import java.nio.file.spi.FileSystemProvider;
+import java.util.Collections;
+import java.util.Set;
+
+import javax.jcr.Node;
+import javax.jcr.Session;
+
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class JcrFileSystem extends FileSystem {
+
+    private final JcrFileSystemProvider provider;
+
+    private final URI uri;
+
+    private final Session session;
+
+    private final Iterable<Path> rootDirectories;
+
+    static final String SEPARATOR = "/";
+
+    private final Logger logger = LoggerFactory.getLogger(JcrFileSystem.class);
+
+    JcrFileSystem(final JcrFileSystemProvider provider, final URI uri, final Session session) {
+        this.provider = provider;
+        this.uri = uri;
+        this.session = session;
+        rootDirectories = Collections.singleton(new JcrPath(this, "/"));
+    }
+
+    @Override
+    public JcrFileSystemProvider provider() {
+        logger.trace("provider");
+        return provider;
+    }
+
+    @Override
+    public void close() throws IOException {
+        logger.info("close");
+        provider.removeFromCache(this);
+        session.logout();
+    }
+
+    @Override
+    public boolean isOpen() {
+        logger.info("isOpen");
+        return session.isLive();
+    }
+
+    @Override
+    public boolean isReadOnly() {
+        logger.info("isReadOnly");
+        return false;
+    }
+
+    @Override
+    public String getSeparator() {
+        logger.info("getSeparator");
+        return SEPARATOR;
+    }
+
+    @Override
+    public Iterable<Path> getRootDirectories() {
+        logger.info("getRootDirectories");
+        return rootDirectories;
+    }
+
+    @Override
+    public Iterable<FileStore> getFileStores() {
+        logger.info("getFileStores");
+        return null;
+    }
+
+    @Override
+    public Set<String> supportedFileAttributeViews() {
+        logger.info("supportedFileAttributeViews");
+        return Collections.singleton("basic");
+    }
+
+    @Override
+    @NotNull
+    public Path getPath(final String first, final String... more) {
+        logger.info("getPath: {}, {}", first, more);
+        return new JcrPath(this, first, more);
+    }
+
+    @Override
+    public PathMatcher getPathMatcher(String syntaxAndPattern) {
+        logger.info("getPathMatcher");
+        throw new UnsupportedOperationException(); // TODO implement?
+    }
+
+    @Override
+    public UserPrincipalLookupService getUserPrincipalLookupService() {
+        logger.info("getUserPrincipalLookupService");
+        throw new UnsupportedOperationException(); // TODO implement?
+    }
+
+    @Override
+    public WatchService newWatchService() throws IOException {
+        logger.info("newWatchService");
+        throw new UnsupportedOperationException(); // TODO implement?
+    }
+
+    Session getSession() {
+        return session;
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileSystemProvider.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrFileSystemProvider.java
new file mode 100644 (file)
index 0000000..0de4955
--- /dev/null
@@ -0,0 +1,283 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URI;
+import java.nio.channels.FileChannel;
+import java.nio.channels.SeekableByteChannel;
+import java.nio.file.AccessMode;
+import java.nio.file.CopyOption;
+import java.nio.file.DirectoryStream;
+import java.nio.file.FileStore;
+import java.nio.file.FileSystem;
+import java.nio.file.LinkOption;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.OpenOption;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.FileAttributeView;
+import java.nio.file.spi.FileSystemProvider;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+
+import org.apache.sling.commons.jcr.file.JcrFileSupportService;
+import org.osgi.framework.Constants;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Reference;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@Component(
+    service = FileSystemProvider.class,
+    property = {
+        Constants.SERVICE_DESCRIPTION + "=Apache Sling Commons JCR File System Provider",
+        Constants.SERVICE_VENDOR + "=The Apache Software Foundation",
+        "type=jcr"
+    }
+)
+public class JcrFileSystemProvider extends FileSystemProvider {
+
+    private final Map<Session, JcrFileSystem> cache = new HashMap<>();
+
+    private final JcrFileStore jcrFileStore = new JcrFileStore();
+
+    @Reference
+    private volatile JcrFileSupportService jcrFileSupportService;
+
+    private final Object lock = new Object();
+
+    static final String SCHEME = "jcr";
+
+    private final Logger logger = LoggerFactory.getLogger(JcrFileSystemProvider.class);
+
+    public JcrFileSystemProvider() {
+    }
+
+    @Override
+    public String getScheme() {
+        logger.info("getting scheme");
+        return SCHEME;
+    }
+
+    @Override
+    public FileSystem newFileSystem(final URI uri, final Map<String, ?> env) throws IOException {
+        logger.info("new file system: {}, {}", uri, env);
+
+        if (!getScheme().equalsIgnoreCase(uri.getScheme())) {
+            throw new IllegalArgumentException("URI scheme is not " + getScheme());
+        }
+
+        if (env == null) {
+            throw new IllegalArgumentException("env is null");
+        }
+
+        if (!env.containsKey(Session.class.getName())) {
+            throw new IllegalArgumentException("no session in env");
+        }
+
+        final Object object = env.get(Session.class.getName());
+        if (object == null) {
+            throw new IllegalArgumentException("session in env is null");
+        }
+
+        if (!(object instanceof Session)) {
+            throw new IllegalArgumentException("session in env is not a " + Session.class.getName());
+        }
+
+        final Session session = (Session) object;
+        if (!session.isLive()) {
+            throw new IllegalArgumentException("session in env is not live");
+        }
+
+        synchronized (lock) {
+            if (isInCache(session)) {
+                throw new IllegalArgumentException("session is already in use");
+            }
+            final JcrFileSystem fileSystem = new JcrFileSystem(this, uri, session);
+            putIntoCache(fileSystem);
+            return fileSystem;
+        }
+    }
+
+    @Override
+    public FileSystem getFileSystem(final URI uri) {
+        final String message = String.format("getting file system by URI is not supported: %s", uri.toString());
+        logger.error(message);
+        throw new UnsupportedOperationException(message);
+    }
+
+    @Override
+    public Path getPath(final URI uri) {
+        final String message = String.format("getting path by URI is not supported: %s", uri.toString());
+        logger.error(message);
+        throw new UnsupportedOperationException(message);
+    }
+
+    // TODO
+    public FileChannel newFileChannel(Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException {
+        logger.info("newFileChannel");
+        try {
+            final Node node = PathUtil.toNode(path);
+            return new JcrFileChannel(node);
+        } catch (Exception e) {
+            throw new IOException(e);
+        }
+    }
+
+    // TODO
+    @Override
+    public SeekableByteChannel newByteChannel(Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException {
+        logger.info("newByteChannel");
+        try {
+            final Node node = PathUtil.toNode(path);
+            return new JcrFileChannel(node);
+        } catch (Exception e) {
+            throw new IOException(e);
+        }
+    }
+
+    @Override
+    public DirectoryStream<Path> newDirectoryStream(final Path dir, final DirectoryStream.Filter<? super Path> filter) throws IOException {
+        logger.info("new directory stream for {}", dir.toString());
+        if (dir instanceof JcrPath) {
+            return new JcrDirectoryStream((JcrPath) dir, filter);
+        } else {
+            throw new IllegalArgumentException("directory is not a JCR path");
+        }
+    }
+
+    // TODO
+    @Override
+    public void createDirectory(Path dir, FileAttribute<?>... attrs) throws IOException {
+        logger.info("createDirectory");
+    }
+
+    // TODO
+    @Override
+    public void delete(Path path) throws IOException {
+        logger.info("delete: {}", path);
+        final File file = path.toFile();
+        if (!file.exists()) {
+            throw new NoSuchFileException(path.toString());
+        } else {
+            // TODO delete
+        }
+    }
+
+    // TODO
+    @Override
+    public void copy(Path source, Path target, CopyOption... options) throws IOException {
+        logger.info("copy");
+    }
+
+    // TODO
+    @Override
+    public void move(Path source, Path target, CopyOption... options) throws IOException {
+        logger.info("move");
+    }
+
+    // TODO
+    @Override
+    public boolean isSameFile(Path path, Path path2) throws IOException {
+        logger.info("isSameFile");
+        return false;
+    }
+
+    // TODO
+    @Override
+    public boolean isHidden(Path path) throws IOException {
+        logger.info("isHidden");
+        return false;
+    }
+
+    @Override
+    public FileStore getFileStore(final Path path) throws IOException {
+        logger.info("getting file store for {}", path.toString());
+        return jcrFileStore;
+    }
+
+    // TODO
+    @Override
+    public void checkAccess(final Path path, final AccessMode... modes) throws IOException {
+        logger.info("checking access: {}", path.toString());
+    }
+
+    // TODO
+    @Override
+    public <V extends FileAttributeView> V getFileAttributeView(final Path path, final Class<V> type, final LinkOption... options) {
+        logger.info("getting file attribute view");
+        return null;
+    }
+
+    // TODO
+    @Override
+    public <A extends BasicFileAttributes> A readAttributes(final Path path, final Class<A> type, final LinkOption... options) throws IOException {
+        logger.info("reading attributes: {}, {}, {}", path, type, options);
+        if (type == BasicFileAttributes.class) {
+            final BasicFileAttributes basicFileAttributes = jcrFileSupportService.fromPath(path);
+            logger.info("basic file attributes: {}", basicFileAttributes);
+            return (A) basicFileAttributes;
+        } else {
+            throw new IOException("Unsupported file attributes type: " + type);
+        }
+    }
+
+    // TODO
+    @Override
+    public Map<String, Object> readAttributes(Path path, String attributes, LinkOption... options) throws IOException {
+        logger.info("readAttributes: {}, {}, {}", path, attributes, options);
+        return Collections.emptyMap();
+    }
+
+    // TODO
+    @Override
+    public void setAttribute(Path path, String attribute, Object value, LinkOption... options) throws IOException {
+        logger.info("setAttribute");
+    }
+
+    boolean isFile(final Node node) throws RepositoryException {
+        return jcrFileSupportService.isFile(node);
+    }
+
+    boolean isDirectory(final Node node) throws RepositoryException {
+        return jcrFileSupportService.isDirectory(node);
+    }
+
+    boolean isInCache(final Session session) {
+        return cache.containsKey(session);
+    }
+
+    void putIntoCache(final JcrFileSystem fileSystem) {
+        cache.put(fileSystem.getSession(), fileSystem);
+    }
+
+    void removeFromCache(final JcrFileSystem fileSystem) {
+        cache.remove(fileSystem.getSession());
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrPath.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/JcrPath.java
new file mode 100644 (file)
index 0000000..7108186
--- /dev/null
@@ -0,0 +1,284 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URI;
+import java.nio.file.FileSystem;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.WatchEvent;
+import java.nio.file.WatchKey;
+import java.nio.file.WatchService;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class JcrPath implements Path {
+
+    private final JcrFileSystem fileSystem;
+
+    private final String path;
+
+    private final List<String> names;
+
+    private final Logger logger = LoggerFactory.getLogger(JcrPath.class);
+
+    JcrPath(final JcrFileSystem fileSystem, final String path) {
+        this.fileSystem = fileSystem;
+        this.path = PathUtil.normalize(path);
+        this.names = names(this.path);
+        logger.info("new path: {}", path);
+    }
+
+    JcrPath(final JcrFileSystem fileSystem, final String first, final String... more) {
+        this.fileSystem = fileSystem;
+        this.path = PathUtil.normalize(first + JcrFileSystem.SEPARATOR + String.join(JcrFileSystem.SEPARATOR, more));
+        this.names = names(this.path);
+        logger.info("new path: {}", path);
+    }
+
+    private List<String> names(final String path) {
+        final List<String> names = new ArrayList<>();
+        if (path != null) {
+            final String[] strings = path.split("/");
+            for (final String string : strings) {
+                if (!string.isEmpty()) {
+                    names.add(string);
+                }
+            }
+        }
+        return names;
+    }
+
+    @Override
+    public FileSystem getFileSystem() {
+        logger.info("getting file system for {}", path);
+        return fileSystem;
+    }
+
+    @Override
+    public boolean isAbsolute() {
+        logger.info("isAbsolute: {}", path);
+        return path.startsWith("/");
+    }
+
+    @Override
+    public Path getRoot() {
+        logger.info("getting root for {}", path);
+        return new JcrPath(fileSystem, "/");
+    }
+
+    @Override
+    public Path getFileName() {
+        logger.info("getting file name for {}", path);
+        if (names.size() == 0) {
+            return null;
+        } else {
+            final String name = names.get(names.size() - 1);
+            logger.info("file name: {}", name);
+            return new JcrPath(fileSystem, name);
+        }
+    }
+
+    @Override
+    public Path getParent() {
+        logger.info("getting parent for {}", path);
+        final String parent = PathUtil.getParent(path);
+        if (parent == null) {
+            return null;
+        }
+        return new JcrPath(fileSystem, parent);
+    }
+
+    @Override
+    public int getNameCount() {
+        logger.info("getting name count: {}", path);
+        return names.size();
+    }
+
+    @Override
+    public Path getName(int index) {
+        logger.info("getting name: {}", path);
+        if (names.size() == 0) {
+            throw new IllegalArgumentException("TODO");
+        }
+        if (index < 0) {
+            throw new IllegalArgumentException("TODO");
+        }
+        if (index >= names.size()) {
+            throw new IllegalArgumentException("TODO");
+        }
+        return new JcrPath(fileSystem, names.get(index));
+    }
+
+    // TODO
+    @Override
+    public Path subpath(int beginIndex, int endIndex) {
+        logger.info("subpath: {}", path);
+        return null;
+    }
+
+    // TODO
+    @Override
+    public boolean startsWith(Path other) {
+        logger.info("startsWith: {}", path);
+        return false;
+    }
+
+    // TODO
+    @Override
+    public boolean startsWith(String other) {
+        logger.info("startsWith: {}", path);
+        return false;
+    }
+
+    // TODO
+    @Override
+    public boolean endsWith(Path other) {
+        logger.info("endsWith: {}", path);
+        return false;
+    }
+
+    // TODO
+    @Override
+    public boolean endsWith(String other) {
+        logger.info("endsWith: {}", path);
+        return false;
+    }
+
+    @Override
+    public Path normalize() {
+        logger.info("normalizing path {}", path);
+        return new JcrPath(fileSystem, PathUtil.normalize(path));
+    }
+
+    // TODO
+    @Override
+    public Path resolve(Path other) {
+        logger.info("resolving given path {} against this path {}", other, this);
+        if (other.isAbsolute()) {
+            return other;
+        }
+        if (this.path.endsWith("/")) {
+            final String path = this.path.concat(other.toString());
+            return new JcrPath(fileSystem, path);
+        } else {
+            final String path = String.format("%s/%s", this.path, other.toString());
+            return new JcrPath(fileSystem, path);
+        }
+    }
+
+    // TODO
+    @Override
+    public Path resolve(String other) {
+        logger.info("resolving given path {} against this path {}", other, this);
+        final Path path = new JcrPath(fileSystem, other); // TODO InvalidPathException
+        return resolve(path);
+    }
+
+    // TODO
+    @Override
+    public Path resolveSibling(Path other) {
+        logger.info("resolveSibling: {}", other);
+        return null;
+    }
+
+    // TODO
+    @Override
+    public Path resolveSibling(String other) {
+        logger.info("resolveSibling: {}", other);
+        return null;
+    }
+
+    // TODO
+    @Override
+    public Path relativize(Path other) {
+        logger.info("relativize: {}", other);
+        return null;
+    }
+
+    // TODO
+    @Override
+    public URI toUri() {
+        logger.info("toUri: {}", path);
+        return null;
+    }
+
+    @Override
+    public Path toAbsolutePath() {
+        logger.info("toAbsolutePath: {}", path);
+        if (isAbsolute()) {
+            return this;
+        } else {
+            return new JcrPath(fileSystem, "/".concat(path));
+        }
+    }
+
+    // TODO
+    @Override
+    public Path toRealPath(LinkOption... options) throws IOException {
+        logger.info("toRealPath: {}", path);
+        return null;
+    }
+
+    @Override
+    public File toFile() {
+        logger.info("to file: {}", path);
+        return new JcrFile(fileSystem, path);
+    }
+
+    // TODO
+    @Override
+    public WatchKey register(WatchService watcher, WatchEvent.Kind<?>[] events, WatchEvent.Modifier... modifiers) throws IOException {
+        logger.info("register1");
+        return null;
+    }
+
+    // TODO
+    @Override
+    public WatchKey register(WatchService watcher, WatchEvent.Kind<?>... events) throws IOException {
+        logger.info("register2");
+        return null;
+    }
+
+    // TODO
+    @Override
+    public Iterator<Path> iterator() {
+        logger.info("iterator");
+        return null;
+    }
+
+    // TODO
+    @Override
+    public int compareTo(Path other) {
+        logger.info("compareTo");
+        return 0;
+    }
+
+    @Override
+    public String toString() {
+        return path;
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/internal/PathUtil.java b/src/main/java/org/apache/sling/commons/jcr/file/internal/PathUtil.java
new file mode 100644 (file)
index 0000000..1db1a09
--- /dev/null
@@ -0,0 +1,258 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.internal;
+
+import java.nio.file.Path;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * see org.apache.sling.api.resource.ResourceUtil
+ */
+public class PathUtil {
+
+    /**
+     * Resolves relative path segments '.' and '..' in the absolute path.
+     * Returns {@code null} if not possible (.. points above root) or if path is not
+     * absolute.
+     *
+     * @param path The path to normalize
+     * @return The normalized path or {@code null}.
+     */
+    @Nullable
+    static String normalize(@NotNull String path) {
+
+        // don't care for empty paths
+        if (path.length() == 0) {
+            return path;
+        }
+
+        // prepare the path buffer with trailing slash (simplifies impl)
+        int absOffset = (path.charAt(0) == '/') ? 0 : 1;
+        char[] buf = new char[path.length() + 1 + absOffset];
+        if (absOffset == 1) {
+            buf[0] = '/';
+        }
+        path.getChars(0, path.length(), buf, absOffset);
+        buf[buf.length - 1] = '/';
+
+        int lastSlash = 0; // last slash in path
+        int numDots = 0; // number of consecutive dots after last slash
+
+        int bufPos = 0;
+        for (int bufIdx = lastSlash; bufIdx < buf.length; bufIdx++) {
+            char c = buf[bufIdx];
+            if (c == '/') {
+                if (numDots == 2) {
+                    if (bufPos == 0) {
+                        return null;
+                    }
+
+                    do {
+                        bufPos--;
+                    } while (bufPos > 0 && buf[bufPos] != '/');
+                }
+
+                lastSlash = bufIdx;
+                numDots = 0;
+            } else if (c == '.' && useDot(buf, bufIdx) && numDots < 2) {
+                numDots++;
+            } else {
+                // find the next slash
+                int nextSlash = bufIdx + 1;
+                while (nextSlash < buf.length && buf[nextSlash] != '/') {
+                    nextSlash++;
+                }
+
+                // append up to the next slash (or end of path)
+                if (bufPos < lastSlash) {
+                    int segLen = nextSlash - bufIdx + 1;
+                    System.arraycopy(buf, lastSlash, buf, bufPos, segLen);
+                    bufPos += segLen;
+                } else {
+                    bufPos = nextSlash;
+                }
+
+                numDots = 0;
+                lastSlash = nextSlash;
+                bufIdx = nextSlash;
+            }
+        }
+
+        String resolved;
+        if (bufPos == 0 && numDots == 0) {
+            resolved = (absOffset == 0) ? "/" : "";
+        } else if ((bufPos - absOffset) == path.length()) {
+            resolved = path;
+        } else {
+            resolved = new String(buf, absOffset, bufPos - absOffset);
+        }
+
+        return resolved;
+    }
+
+    // use this dot only if followed by /
+    // don't use if followed by neither . nor /
+    // keep checking till a non-dot is found
+    private static boolean useDot(char[] buf, int bufIdx) {
+        while(bufIdx < buf.length -1) {
+            if(buf[bufIdx] == '/') {
+                return true;
+            }
+            else if(buf[bufIdx] != '.') {
+                return false;
+            }
+            bufIdx++;
+        }
+        return true;
+    }
+    /**
+     * Utility method returns the parent path of the given <code>path</code>,
+     * which is normalized by {@link #normalize(String)} before resolving the
+     * parent.
+     *
+     * @param path The path whose parent is to be returned.
+     * @return <code>null</code> if <code>path</code> is the root path (
+     *         <code>/</code>) or if <code>path</code> is a single name
+     *         containing no slash (<code>/</code>) characters.
+     * @throws IllegalArgumentException If the path cannot be normalized by the
+     *             {@link #normalize(String)} method.
+     * @throws NullPointerException If <code>path</code> is <code>null</code>.
+     */
+    @Nullable
+    static String getParent(@NotNull String path) {
+        if ("/".equals(path)) {
+            return null;
+        }
+
+        // normalize path (remove . and ..)
+        path = normalize(path);
+
+        // if normalized to root, there is no parent
+        if (path == null || "/".equals(path)) {
+            return null;
+        }
+
+        String workspaceName = null;
+
+        final int wsSepPos = path.indexOf(":/");
+        if (wsSepPos != -1) {
+            workspaceName = path.substring(0, wsSepPos);
+            path = path.substring(wsSepPos + 1);
+        }
+
+        // find the last slash, after which to cut off
+        int lastSlash = path.lastIndexOf('/');
+        if (lastSlash < 0) {
+            // no slash in the path
+            return null;
+        } else if (lastSlash == 0) {
+            // parent is root
+            if (workspaceName != null) {
+                return workspaceName + ":/";
+            }
+            return "/";
+        }
+
+        String parentPath = path.substring(0, lastSlash);
+        if (workspaceName != null) {
+            return workspaceName + ":" + parentPath;
+        }
+        return parentPath;
+    }
+
+    /**
+     * Utility method returns the ancestor's path at the given <code>level</code>
+     * relative to <code>path</code>, which is normalized by {@link #normalize(String)}
+     * before resolving the ancestor.
+     *
+     * <ul>
+     * <li><code>level</code> = 0 returns the <code>path</code>.</li>
+     * <li><code>level</code> = 1 returns the parent of <code>path</code>, if it exists, <code>null</code> otherwise.</li>
+     * <li><code>level</code> = 2 returns the grandparent of <code>path</code>, if it exists, <code>null</code> otherwise.</li>
+     * </ul>
+     *
+     * @param path The path whose ancestor is to be returned.
+     * @param level The relative level of the ancestor, relative to <code>path</code>.
+     * @return <code>null</code> if <code>path</code> doesn't have an ancestor at the
+     *            specified <code>level</code>.
+     * @throws IllegalArgumentException If the path cannot be normalized by the
+     *             {@link #normalize(String)} method or if <code>level</code> &lt; 0.
+     * @throws NullPointerException If <code>path</code> is <code>null</code>.
+     * @since 2.2 (Sling API Bundle 2.2.0)
+     */
+    static String getParent(final String path, final int level) {
+        if ( level < 0 ) {
+            throw new IllegalArgumentException("level must be non-negative");
+        }
+        String result = path;
+        for(int i=0; i<level; i++) {
+            result = getParent(result);
+            if ( result == null ) {
+                break;
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Utility method returns the name of the given <code>path</code>, which is
+     * normalized by {@link #normalize(String)} before resolving the name.
+     *
+     * @param path The path whose name (the last path element) is to be
+     *            returned.
+     * @return The empty string if <code>path</code> is the root path (
+     *         <code>/</code>) or if <code>path</code> is a single name
+     *         containing no slash (<code>/</code>) characters.
+     * @throws IllegalArgumentException If the path cannot be normalized by the
+     *             {@link #normalize(String)} method.
+     * @throws NullPointerException If <code>path</code> is <code>null</code>.
+     */
+    @NotNull
+    static String getName(@NotNull String path) {
+        if ("/".equals(path)) {
+            return "";
+        }
+
+        // normalize path (remove . and ..)
+        path = normalize(path);
+        if ("/".equals(path)) {
+            return "";
+        }
+
+        // find the last slash
+        return path.substring(path.lastIndexOf('/') + 1);
+    }
+
+    static boolean isAbsolute(final String path) {
+        return path.startsWith("/");
+    }
+
+    static Node toNode(final Path path) throws RepositoryException {
+        final JcrFileSystem fileSystem = (JcrFileSystem) path.getFileSystem();
+        final Session session = fileSystem.getSession();
+        return session.getNode(path.toString());
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/commons/jcr/file/package-info.java b/src/main/java/org/apache/sling/commons/jcr/file/package-info.java
new file mode 100644 (file)
index 0000000..2d0f34c
--- /dev/null
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+@Version("0.0.1")
+package org.apache.sling.commons.jcr.file;
+
+import org.osgi.annotation.versioning.Version;
diff --git a/src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileIT.java b/src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileIT.java
new file mode 100644 (file)
index 0000000..efb01b3
--- /dev/null
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.it;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.FileSystem;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.ops4j.pax.exam.junit.PaxExam;
+import org.ops4j.pax.exam.spi.reactors.ExamReactorStrategy;
+import org.ops4j.pax.exam.spi.reactors.PerClass;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+
+@RunWith(PaxExam.class)
+@ExamReactorStrategy(PerClass.class)
+public final class JcrFileIT extends JcrFileTestSupport {
+
+    private FileSystem fileSystem;
+
+    // /content/starter
+    private File starter;
+
+    // /content/starter/sling-logo.png
+    private File sling_logo_png;
+
+    @Before
+    public void setUp() throws Exception {
+        fileSystem = fileSystem("admin", "/");
+        starter = fileSystem.getPath("/content/starter").toFile();
+        sling_logo_png = fileSystem.getPath("/content/starter/sling-logo.png").toFile();
+    }
+
+    @After
+    public void tearDown() throws IOException {
+        fileSystem.close();
+    }
+
+    @Test
+    public void test_sling_logo_png_getName() {
+        assertThat(sling_logo_png.getName(), is("sling-logo.png"));
+    }
+
+    @Test
+    public void test_sling_logo_png_isFile() {
+        assertThat(sling_logo_png.isFile(), is(true));
+    }
+
+    @Test
+    public void test_sling_logo_png_isDirecory() {
+        assertThat(sling_logo_png.isDirectory(), is(false));
+    }
+
+    @Test
+    public void test_sling_logo_png_getParentFile() {
+        assertThat(sling_logo_png.getParentFile(), is(starter));
+    }
+
+}
diff --git a/src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileSystemProviderIT.java b/src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileSystemProviderIT.java
new file mode 100644 (file)
index 0000000..53014e1
--- /dev/null
@@ -0,0 +1,147 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.it;
+
+import java.net.URI;
+import java.nio.file.FileSystem;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.jcr.Session;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.ops4j.pax.exam.junit.PaxExam;
+import org.ops4j.pax.exam.spi.reactors.ExamReactorStrategy;
+import org.ops4j.pax.exam.spi.reactors.PerClass;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.junit.Assert.fail;
+
+@RunWith(PaxExam.class)
+@ExamReactorStrategy(PerClass.class)
+public class JcrFileSystemProviderIT extends JcrFileTestSupport {
+
+    @Test
+    public void testFileSystemProvider() {
+        assertThat(fileSystemProvider, notNullValue());
+    }
+
+    @Test
+    public void testGetScheme() {
+        assertThat("jcr", equalTo(fileSystemProvider.getScheme()));
+    }
+
+    @Test
+    public void testNewFileSystem() throws Exception {
+        final URI uri = new URI("jcr", null, "/", null);
+        final Map<String, Object> env = new HashMap<>();
+        final Session session = userSession("admin");
+        env.put(Session.class.getName(), session);
+        final FileSystem fileSystem = fileSystemProvider.newFileSystem(uri, env);
+        assertThat(fileSystem, notNullValue());
+        fileSystem.close();
+        assertThat(session.isLive(), is(false));
+    }
+
+    @Test
+    public void testNewFileSystem_InvalidScheme() throws Exception {
+        final URI uri = new URI("/");
+        final Map<String, Object> env = new HashMap<>();
+        final Session session = userSession("admin");
+        env.put(Session.class.getName(), session);
+        try {
+            fileSystemProvider.newFileSystem(uri, env);
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            assertThat(e.getMessage(), is("URI scheme is not " + fileSystemProvider.getScheme()));
+        }
+    }
+
+    @Test
+    public void testNewFileSystem_EnvIsNull() throws Exception {
+        final URI uri = new URI("jcr", null, "/", null);
+        try {
+            fileSystemProvider.newFileSystem(uri, null);
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            assertThat(e.getMessage(), is("env is null"));
+        }
+    }
+
+    @Test
+    public void testNewFileSystem_NoSession() throws Exception {
+        final URI uri = new URI("jcr", null, "/", null);
+        final Map<String, Object> env = new HashMap<>();
+        try {
+            fileSystemProvider.newFileSystem(uri, env);
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            assertThat(e.getMessage(), is("no session in env"));
+        }
+    }
+
+    @Test
+    public void testNewFileSystem_SessionIsNull() throws Exception {
+        final URI uri = new URI("jcr", null, "/", null);
+        final Map<String, Object> env = new HashMap<>();
+        env.put(Session.class.getName(), null);
+        try {
+            fileSystemProvider.newFileSystem(uri, env);
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            assertThat(e.getMessage(), is("session in env is null"));
+        }
+    }
+
+    @Test
+    public void testNewFileSystem_InvalidSession() throws Exception {
+        final URI uri = new URI("jcr", null, "/", null);
+        final Map<String, Object> env = new HashMap<>();
+        env.put(Session.class.getName(), new Object());
+        try {
+            fileSystemProvider.newFileSystem(uri, env);
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            assertThat(e.getMessage(), is("session in env is not a " + Session.class.getName()));
+        }
+    }
+
+    @Test
+    public void testNewFileSystem_SessionInUse() throws Exception {
+        final URI uri = new URI("jcr", null, "/", null);
+        final Map<String, Object> env = new HashMap<>();
+        final Session session = userSession("admin");
+        env.put(Session.class.getName(), session);
+        final FileSystem fileSystem = fileSystemProvider.newFileSystem(uri, env);
+        assertThat(fileSystem, notNullValue());
+        try {
+            fileSystemProvider.newFileSystem(uri, env);
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            assertThat(e.getMessage(), is("session is already in use"));
+        } finally {
+            fileSystem.close();
+        }
+    }
+
+}
diff --git a/src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileTestSupport.java b/src/test/java/org/apache/sling/commons/jcr/file/it/JcrFileTestSupport.java
new file mode 100644 (file)
index 0000000..e38c648
--- /dev/null
@@ -0,0 +1,102 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.commons.jcr.file.it;
+
+import java.net.URI;
+import java.nio.file.FileSystem;
+import java.nio.file.spi.FileSystemProvider;
+import java.util.Collections;
+import java.util.Map;
+
+import javax.inject.Inject;
+import javax.jcr.Credentials;
+import javax.jcr.Repository;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.SimpleCredentials;
+
+import org.apache.sling.resource.presence.ResourcePresence;
+import org.apache.sling.testing.paxexam.TestSupport;
+import org.ops4j.pax.exam.Configuration;
+import org.ops4j.pax.exam.Option;
+import org.ops4j.pax.exam.util.Filter;
+
+import static org.apache.sling.testing.paxexam.SlingOptions.slingQuickstartOakTar;
+import static org.apache.sling.testing.paxexam.SlingOptions.slingResourcePresence;
+import static org.apache.sling.testing.paxexam.SlingVersionResolver.SLING_GROUP_ID;
+import static org.ops4j.pax.exam.CoreOptions.composite;
+import static org.ops4j.pax.exam.CoreOptions.junitBundles;
+import static org.ops4j.pax.exam.CoreOptions.mavenBundle;
+import static org.ops4j.pax.exam.cm.ConfigurationAdminOptions.factoryConfiguration;
+
+public abstract class JcrFileTestSupport extends TestSupport {
+
+    @Inject
+    protected Repository repository;
+
+    @Inject
+    @Filter(value = "(type=jcr)")
+    protected FileSystemProvider fileSystemProvider;
+
+    @Inject
+    @Filter(value = "(path=/content/starter/sling-logo.png)")
+    private ResourcePresence resourcePresence;
+
+    protected static final Credentials ADMIN_CREDENTIALS = new SimpleCredentials("admin", "admin".toCharArray());
+
+    @Configuration
+    public Option[] configuration() {
+        return new Option[]{
+            baseConfiguration(),
+            quickstart(),
+            // Sling Commons JCR File
+            testBundle("bundle.filename"),
+            // testing
+            slingResourcePresence(),
+            factoryConfiguration("org.apache.sling.resource.presence.internal.ResourcePresenter")
+                .put("path", "/content/starter/sling-logo.png")
+                .asOption(),
+            mavenBundle().groupId(SLING_GROUP_ID).artifactId("org.apache.sling.starter.content").version("1.0.0"),
+            mavenBundle().groupId("org.apache.servicemix.bundles").artifactId("org.apache.servicemix.bundles.hamcrest").versionAsInProject(),
+            junitBundles()
+        };
+    }
+
+    protected Option quickstart() {
+        final int httpPort = findFreePort();
+        final String workingDirectory = workingDirectory();
+        return composite(
+            slingQuickstartOakTar(workingDirectory, httpPort)
+        );
+    }
+
+    protected Session userSession(final String username) throws RepositoryException {
+        final Session session = repository.login(ADMIN_CREDENTIALS);
+        final Credentials credentials = new SimpleCredentials(username, "".toCharArray());
+        return session.impersonate(credentials);
+    }
+
+    protected FileSystem fileSystem(final String username, final String path) throws Exception {
+        final URI uri = new URI("jcr", null, path, null);
+        final Session session = userSession(username);
+        final Map<String, Object> env = Collections.singletonMap(Session.class.getName(), session);
+        return fileSystemProvider.newFileSystem(uri, env);
+    }
+
+}