/* * 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.commons.vfs2.impl; import org.apache.commons.vfs2.FileName; import org.apache.commons.vfs2.FileObject; import org.apache.commons.vfs2.FileSystem; import org.apache.commons.vfs2.FileSystemException; import org.apache.commons.vfs2.FileType; import org.apache.commons.vfs2.provider.AbstractFileName; import org.apache.commons.vfs2.provider.AbstractFileSystem; import org.apache.commons.vfs2.provider.AbstractVfsContainer; /** * A virtual file system provider. */ public class VirtualFileProvider extends AbstractVfsContainer { /** * Creates a virtual file system, with the supplied file as its root. * * @param rootFile The root of the file system. * @return A FileObject in the FileSystem. * @throws FileSystemException if an error occurs. */ public FileObject createFileSystem(final FileObject rootFile) throws FileSystemException { final AbstractFileName rootName = (AbstractFileName) getContext().getFileSystemManager() .resolveName(rootFile.getName(), FileName.ROOT_PATH); final VirtualFileSystem fs = new VirtualFileSystem(rootName, rootFile.getFileSystem().getFileSystemOptions()); addComponent(fs); fs.addJunction(FileName.ROOT_PATH, rootFile); return fs.getRoot(); } /** * Creates an empty virtual file system. * * @param rootUri The root of the file system. * @return A FileObject in the FileSystem. * @throws FileSystemException if an error occurs. */ public FileObject createFileSystem(final String rootUri) throws FileSystemException { final AbstractFileName rootName = new VirtualFileName(rootUri, FileName.ROOT_PATH, FileType.FOLDER); final VirtualFileSystem fs = new VirtualFileSystem(rootName, null); addComponent(fs); return fs.getRoot(); } /** * Close a VirtualFileSystem by removing it from the {@code #components} list of this provider. * <p> * This gets called from DefaultFileManager#_closeFileSystem. * </p> * * @param fileSystem the file system remembered by this provider. */ void closeFileSystem(final FileSystem fileSystem) { final AbstractFileSystem fs = (AbstractFileSystem) fileSystem; removeComponent(fs); fs.close(); } }