content: /*
   * Copyright (C) 2014 The Android Open Source Project
   *
   * Licensed 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 android.support.provider;
  
  import android.net.Uri;
  import android.util.Log;
  import android.webkit.MimeTypeMap;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  
  class RawDocumentFile extends DocumentFile {
      private File mFile;
  
      RawDocumentFile(DocumentFile parent, File file) {
          super(parent);
          mFile = file;
      }
  
      @Override
      public DocumentFile createFile(String mimeType, String displayName) {
          // Tack on extension when valid MIME type provided
          final String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mimeType);
          if (extension != null) {
              displayName += "." + extension;
          }
          final File target = new File(mFile, displayName);
          try {
              target.createNewFile();
              return new RawDocumentFile(this, target);
          } catch (IOException e) {
              Log.w(TAG, "Failed to createFile: " + e);
              return null;
          }
      }
  
      @Override
      public DocumentFile createDirectory(String displayName) {
          final File target = new File(mFile, displayName);
          if (target.isDirectory() || target.mkdir()) {
              return new RawDocumentFile(this, target);
          } else {
              return null;
          }
      }
  
      @Override
      public Uri getUri() {
          return Uri.fromFile(mFile);
      }
  
      @Override
      public String getName() {
          return mFile.getName();
      }
  
      @Override
      public String getType() {
          if (mFile.isDirectory()) {
              return null;
          } else {
              return getTypeForName(mFile.getName());
          }
      }
  
      @Override
      public boolean isDirectory() {
          return mFile.isDirectory();
      }
  
      @Override
      public boolean isFile() {
          return mFile.isFile();
      }
  
      @Override
      public boolean isVirtual() {
          return false;
      }
  
      @Override
      public long lastModified() {
          return mFile.lastModified();
      }
  
      @Override
      public long length() {
          return mFile.length();
      }
  
      @Override
      public boolean canRead() {
          return mFile.canRead();
      }
  
      @Override
      public boolean canWrite() {
          return mFile.canWrite();
      }
  
      @Override
      public boolean delete() {
          deleteContents(mFile);
          return mFile.delete();
      }
  
      @Override
      public boolean exists() {
          return mFile.exists();
      }
  
      @Override
      public DocumentFile[] listFiles() {
          final ArrayList<DocumentFile> results = new ArrayList<DocumentFile>();
          final File[] files = mFile.listFiles();
          if (files != null) {
              for (File file : files) {
                  results.add(new RawDocumentFile(this, file));
              }
          }
          return results.toArray(new DocumentFile[results.size()]);
      }
  
      @Override
      public boolean renameTo(String displayName) {
          final File target = new File(mFile.getParentFile(), displayName);
          if (mFile.renameTo(target)) {
              mFile = target;
              return true;
          } else {
              return false;
          }
      }
  
      private static String getTypeForName(String name) {
          final int lastDot = name.lastIndexOf('.');
          if (lastDot >= 0) {
              final String extension = name.substring(lastDot + 1).toLowerCase();
              final String mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
              if (mime != null) {
                  return mime;
              }
          }
  
          return "application/octet-stream";
      }
  
      private static boolean deleteContents(File dir) {
          File[] files = dir.listFiles();
          boolean success = true;
          if (files != null) {
              for (File file : files) {
                  if (file.isDirectory()) {
                      success &= deleteContents(file);
                  }
                  if (!file.delete()) {
                      Log.w(TAG, "Failed to delete " + file);
                      success = false;
                  }
              }
          }
          return success;
      }
  }
  