| /* |
| * Copyright (C) 2006 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.content.res; |
| |
| import android.os.ParcelFileDescriptor; |
| |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| |
| /** |
| * File descriptor of an entry in the AssetManager. This provides your own |
| * opened FileDescriptor that can be used to read the data, as well as the |
| * offset and length of that entry's data in the file. |
| */ |
| public class AssetFileDescriptor { |
| private final ParcelFileDescriptor mFd; |
| private final long mStartOffset; |
| private final long mLength; |
| |
| /** |
| * Create a new AssetFileDescriptor from the given values. |
| */ |
| public AssetFileDescriptor(ParcelFileDescriptor fd, long startOffset, |
| long length) { |
| mFd = fd; |
| mStartOffset = startOffset; |
| mLength = length; |
| } |
| |
| /** |
| * The AssetFileDescriptor contains its own ParcelFileDescriptor, which |
| * in addition to the normal FileDescriptor object also allows you to close |
| * the descriptor when you are done with it. |
| */ |
| public ParcelFileDescriptor getParcelFileDescriptor() { |
| return mFd; |
| } |
| |
| /** |
| * Returns the FileDescriptor that can be used to read the data in the |
| * file. |
| */ |
| public FileDescriptor getFileDescriptor() { |
| return mFd.getFileDescriptor(); |
| } |
| |
| /** |
| * Returns the byte offset where this asset entry's data starts. |
| */ |
| public long getStartOffset() { |
| return mStartOffset; |
| } |
| |
| /** |
| * Returns the total number of bytes of this asset entry's data. |
| */ |
| public long getLength() { |
| return mLength; |
| } |
| |
| /** |
| * Convenience for calling <code>getParcelFileDescriptor().close()</code>. |
| */ |
| public void close() throws IOException { |
| mFd.close(); |
| } |
| } |