001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.vfs2.provider.compressed; 018 019import java.util.Collection; 020 021import org.apache.commons.vfs2.Capability; 022import org.apache.commons.vfs2.FileName; 023import org.apache.commons.vfs2.FileObject; 024import org.apache.commons.vfs2.FileSystem; 025import org.apache.commons.vfs2.FileSystemException; 026import org.apache.commons.vfs2.FileSystemOptions; 027import org.apache.commons.vfs2.FileType; 028import org.apache.commons.vfs2.provider.AbstractLayeredFileProvider; 029import org.apache.commons.vfs2.provider.LayeredFileName; 030 031/** 032 * A file system provider for compressed files. Provides read-only file systems. 033 */ 034public abstract class CompressedFileFileProvider extends AbstractLayeredFileProvider { 035 public CompressedFileFileProvider() { 036 super(); 037 } 038 039 /** 040 * Parses an absolute URI. 041 * 042 * @param uri The URI to parse. 043 */ 044 /* 045 * public FileName parseUri(final String uri) throws FileSystemException { return ZipFileName.parseUri(uri); } 046 */ 047 048 /** 049 * Creates a layered file system. This method is called if the file system is not cached. 050 * 051 * @param scheme The URI scheme. 052 * @param file The file to create the file system on top of. 053 * @return The file system. 054 */ 055 @Override 056 protected FileSystem doCreateFileSystem(final String scheme, final FileObject file, 057 final FileSystemOptions fileSystemOptions) throws FileSystemException { 058 final FileName name = new LayeredFileName(scheme, file.getName(), FileName.ROOT_PATH, FileType.FOLDER); 059 return createFileSystem(name, file, fileSystemOptions); 060 } 061 062 protected abstract FileSystem createFileSystem(final FileName name, final FileObject file, 063 final FileSystemOptions fileSystemOptions) throws FileSystemException; 064 065 @Override 066 public abstract Collection<Capability> getCapabilities(); 067}