1 /* 2 * Copyright (C) 2014 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 android.support.v4.provider; 18 19 import android.net.Uri; 20 import android.util.Log; 21 import android.webkit.MimeTypeMap; 22 23 import java.io.File; 24 import java.io.IOException; 25 import java.util.ArrayList; 26 27 class RawDocumentFile extends DocumentFile { 28 private File mFile; 29 RawDocumentFile(DocumentFile parent, File file)30 RawDocumentFile(DocumentFile parent, File file) { 31 super(parent); 32 mFile = file; 33 } 34 35 @Override createFile(String mimeType, String displayName)36 public DocumentFile createFile(String mimeType, String displayName) { 37 // Tack on extension when valid MIME type provided 38 final String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mimeType); 39 if (extension != null) { 40 displayName += "." + extension; 41 } 42 final File target = new File(mFile, displayName); 43 try { 44 target.createNewFile(); 45 return new RawDocumentFile(this, target); 46 } catch (IOException e) { 47 Log.w(TAG, "Failed to createFile: " + e); 48 return null; 49 } 50 } 51 52 @Override createDirectory(String displayName)53 public DocumentFile createDirectory(String displayName) { 54 final File target = new File(mFile, displayName); 55 if (target.isDirectory() || target.mkdir()) { 56 return new RawDocumentFile(this, target); 57 } else { 58 return null; 59 } 60 } 61 62 @Override getUri()63 public Uri getUri() { 64 return Uri.fromFile(mFile); 65 } 66 67 @Override getName()68 public String getName() { 69 return mFile.getName(); 70 } 71 72 @Override getType()73 public String getType() { 74 if (mFile.isDirectory()) { 75 return null; 76 } else { 77 return getTypeForName(mFile.getName()); 78 } 79 } 80 81 @Override isDirectory()82 public boolean isDirectory() { 83 return mFile.isDirectory(); 84 } 85 86 @Override isFile()87 public boolean isFile() { 88 return mFile.isFile(); 89 } 90 91 @Override lastModified()92 public long lastModified() { 93 return mFile.lastModified(); 94 } 95 96 @Override length()97 public long length() { 98 return mFile.length(); 99 } 100 101 @Override canRead()102 public boolean canRead() { 103 return mFile.canRead(); 104 } 105 106 @Override canWrite()107 public boolean canWrite() { 108 return mFile.canWrite(); 109 } 110 111 @Override delete()112 public boolean delete() { 113 deleteContents(mFile); 114 return mFile.delete(); 115 } 116 117 @Override exists()118 public boolean exists() { 119 return mFile.exists(); 120 } 121 122 @Override listFiles()123 public DocumentFile[] listFiles() { 124 final ArrayList<DocumentFile> results = new ArrayList<DocumentFile>(); 125 final File[] files = mFile.listFiles(); 126 if (files != null) { 127 for (File file : files) { 128 results.add(new RawDocumentFile(this, file)); 129 } 130 } 131 return results.toArray(new DocumentFile[results.size()]); 132 } 133 134 @Override renameTo(String displayName)135 public boolean renameTo(String displayName) { 136 final File target = new File(mFile.getParentFile(), displayName); 137 if (mFile.renameTo(target)) { 138 mFile = target; 139 return true; 140 } else { 141 return false; 142 } 143 } 144 getTypeForName(String name)145 private static String getTypeForName(String name) { 146 final int lastDot = name.lastIndexOf('.'); 147 if (lastDot >= 0) { 148 final String extension = name.substring(lastDot + 1).toLowerCase(); 149 final String mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension); 150 if (mime != null) { 151 return mime; 152 } 153 } 154 155 return "application/octet-stream"; 156 } 157 deleteContents(File dir)158 private static boolean deleteContents(File dir) { 159 File[] files = dir.listFiles(); 160 boolean success = true; 161 if (files != null) { 162 for (File file : files) { 163 if (file.isDirectory()) { 164 success &= deleteContents(file); 165 } 166 if (!file.delete()) { 167 Log.w(TAG, "Failed to delete " + file); 168 success = false; 169 } 170 } 171 } 172 return success; 173 } 174 } 175