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 org.apache.commons.vfs2.Capability; 020import org.apache.commons.vfs2.FileObject; 021import org.apache.commons.vfs2.FileSystemException; 022import org.apache.commons.vfs2.FileType; 023import org.apache.commons.vfs2.provider.AbstractFileName; 024import org.apache.commons.vfs2.provider.AbstractFileObject; 025 026/** 027 * A compressed file. 028 * 029 * <p> 030 * Such a file only has one child (the compressed filename with stripped last extension) 031 * </p> 032 * 033 * @param <FS> A CompressedFileFileSystem 034 */ 035public abstract class CompressedFileFileObject<FS extends CompressedFileFileSystem> extends AbstractFileObject<FS> { 036 private final FileObject container; 037 private final String[] children; 038 039 protected CompressedFileFileObject(final AbstractFileName name, final FileObject container, final FS fs) { 040 super(name, fs); 041 this.container = container; 042 043 // todo, add getBaseName(String) to FileName 044 String basename = container.getName().getBaseName(); 045 final int pos = basename.lastIndexOf('.'); 046 if (pos > 0) { 047 basename = basename.substring(0, pos); 048 } 049 children = new String[] { basename }; 050 } 051 052 /** 053 * Determines if this file can be written to. 054 * 055 * @return {@code true} if this file is writeable, {@code false} if not. 056 * @throws FileSystemException if an error occurs. 057 */ 058 @Override 059 public boolean isWriteable() throws FileSystemException { 060 return getFileSystem().hasCapability(Capability.WRITE_CONTENT); 061 } 062 063 /** 064 * Returns the file's type. 065 */ 066 @Override 067 protected FileType doGetType() throws FileSystemException { 068 if (getName().getPath().endsWith("/")) { 069 return FileType.FOLDER; 070 } 071 return FileType.FILE; 072 } 073 074 /** 075 * Lists the children of the file. 076 */ 077 @Override 078 protected String[] doListChildren() { 079 return children; 080 } 081 082 /** 083 * Returns the size of the file content (in bytes). Is only called if {@link #doGetType} returns 084 * {@link FileType#FILE}. 085 */ 086 @Override 087 protected long doGetContentSize() { 088 return -1; 089 } 090 091 /** 092 * Returns the last modified time of this file. 093 */ 094 @Override 095 protected long doGetLastModifiedTime() throws Exception { 096 return container.getContent().getLastModifiedTime(); 097 } 098 099 protected FileObject getContainer() { 100 return container; 101 } 102 103 @Override 104 public void createFile() throws FileSystemException { 105 container.createFile(); 106 injectType(FileType.FILE); 107 } 108}