1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.io; 18 19 20 import java.io.File; 21 import java.io.FileInputStream; 22 import java.io.FileNotFoundException; 23 import java.io.FileOutputStream; 24 import java.io.IOException; 25 import java.io.InputStream; 26 import java.io.OutputStream; 27 import java.net.URI; 28 29 /** 30 * An implementation of {@link IAbstractFile} extending {@link File}. 31 */ 32 public class FileWrapper extends File implements IAbstractFile { 33 private static final long serialVersionUID = 1L; 34 35 /** 36 * Creates a new File instance matching a given {@link File} object. 37 * @param file the file to match 38 */ FileWrapper(File file)39 public FileWrapper(File file) { 40 super(file.getAbsolutePath()); 41 } 42 43 /** 44 * Creates a new File instance from a parent abstract pathname and a child pathname string. 45 * @param parent the parent pathname 46 * @param child the child name 47 * 48 * @see File#File(File, String) 49 */ FileWrapper(File parent, String child)50 public FileWrapper(File parent, String child) { 51 super(parent, child); 52 } 53 54 /** 55 * Creates a new File instance by converting the given pathname string into an abstract 56 * pathname. 57 * @param osPathname the OS pathname 58 * 59 * @see File#File(String) 60 */ FileWrapper(String osPathname)61 public FileWrapper(String osPathname) { 62 super(osPathname); 63 } 64 65 /** 66 * Creates a new File instance from a parent abstract pathname and a child pathname string. 67 * @param parent the parent pathname 68 * @param child the child name 69 * 70 * @see File#File(String, String) 71 */ FileWrapper(String parent, String child)72 public FileWrapper(String parent, String child) { 73 super(parent, child); 74 } 75 76 /** 77 * Creates a new File instance by converting the given <code>file:</code> URI into an 78 * abstract pathname. 79 * @param uri An absolute, hierarchical URI with a scheme equal to "file", a non-empty path 80 * component, and undefined authority, query, and fragment components 81 * 82 * @see File#File(URI) 83 */ FileWrapper(URI uri)84 public FileWrapper(URI uri) { 85 super(uri); 86 } 87 88 @Override getContents()89 public InputStream getContents() throws StreamException { 90 try { 91 return new FileInputStream(this); 92 } catch (FileNotFoundException e) { 93 throw new StreamException(e, this, StreamException.Error.FILENOTFOUND); 94 } 95 } 96 97 @Override setContents(InputStream source)98 public void setContents(InputStream source) throws StreamException { 99 FileOutputStream fos = null; 100 try { 101 fos = new FileOutputStream(this); 102 103 byte[] buffer = new byte[1024]; 104 int count = 0; 105 while ((count = source.read(buffer)) != -1) { 106 fos.write(buffer, 0, count); 107 } 108 } catch (IOException e) { 109 throw new StreamException(e, this); 110 } finally { 111 if (fos != null) { 112 try { 113 fos.close(); 114 } catch (IOException e) { 115 throw new StreamException(e, this); 116 } 117 } 118 } 119 } 120 121 @Override getOutputStream()122 public OutputStream getOutputStream() throws StreamException { 123 try { 124 return new FileOutputStream(this); 125 } catch (FileNotFoundException e) { 126 throw new StreamException(e, this); 127 } 128 } 129 130 @Override getPreferredWriteMode()131 public PreferredWriteMode getPreferredWriteMode() { 132 return PreferredWriteMode.OUTPUTSTREAM; 133 } 134 135 @Override getOsLocation()136 public String getOsLocation() { 137 return getAbsolutePath(); 138 } 139 140 @Override exists()141 public boolean exists() { 142 return isFile(); 143 } 144 145 @Override getModificationStamp()146 public long getModificationStamp() { 147 return lastModified(); 148 } 149 150 @Override getParentFolder()151 public IAbstractFolder getParentFolder() { 152 String p = this.getParent(); 153 if (p == null) { 154 return null; 155 } 156 return new FolderWrapper(p); 157 } 158 } 159