1 /* 2 * Copyright (C) 2010 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.gallery3d.util; 18 19 import com.android.gallery3d.common.Utils; 20 21 import java.io.IOException; 22 import java.io.InterruptedIOException; 23 import java.io.OutputStream; 24 25 public class InterruptableOutputStream extends OutputStream { 26 27 private static final int MAX_WRITE_BYTES = 4096; 28 29 private OutputStream mOutputStream; 30 private volatile boolean mIsInterrupted = false; 31 InterruptableOutputStream(OutputStream outputStream)32 public InterruptableOutputStream(OutputStream outputStream) { 33 mOutputStream = Utils.checkNotNull(outputStream); 34 } 35 36 @Override write(int oneByte)37 public void write(int oneByte) throws IOException { 38 if (mIsInterrupted) throw new InterruptedIOException(); 39 mOutputStream.write(oneByte); 40 } 41 42 @Override write(byte[] buffer, int offset, int count)43 public void write(byte[] buffer, int offset, int count) throws IOException { 44 int end = offset + count; 45 while (offset < end) { 46 if (mIsInterrupted) throw new InterruptedIOException(); 47 int bytesCount = Math.min(MAX_WRITE_BYTES, end - offset); 48 mOutputStream.write(buffer, offset, bytesCount); 49 offset += bytesCount; 50 } 51 } 52 53 @Override close()54 public void close() throws IOException { 55 mOutputStream.close(); 56 } 57 58 @Override flush()59 public void flush() throws IOException { 60 if (mIsInterrupted) throw new InterruptedIOException(); 61 mOutputStream.flush(); 62 } 63 interrupt()64 public void interrupt() { 65 mIsInterrupted = true; 66 } 67 } 68