| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.trevni; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream; |
| import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream; |
| |
| public class BZip2Codec extends Codec { |
| |
| private ByteArrayOutputStream outputBuffer; |
| public static final int DEFAULT_BUFFER_SIZE = 64 * 1024; |
| |
| @Override |
| ByteBuffer compress(ByteBuffer uncompressedData) throws IOException { |
| ByteArrayOutputStream baos = getOutputBuffer(uncompressedData.remaining()); |
| BZip2CompressorOutputStream outputStream = new BZip2CompressorOutputStream(baos); |
| |
| try { |
| outputStream.write(uncompressedData.array()); |
| } finally { |
| outputStream.close(); |
| } |
| |
| ByteBuffer result = ByteBuffer.wrap(baos.toByteArray()); |
| return result; |
| } |
| |
| @Override |
| ByteBuffer decompress(ByteBuffer compressedData) throws IOException { |
| ByteArrayInputStream bais = new ByteArrayInputStream(compressedData.array()); |
| BZip2CompressorInputStream inputStream = new BZip2CompressorInputStream(bais); |
| try { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| |
| byte[] buffer = new byte[DEFAULT_BUFFER_SIZE]; |
| |
| int readCount = -1; |
| |
| while ( (readCount = inputStream.read(buffer, compressedData.position(), buffer.length))> 0) { |
| baos.write(buffer, 0, readCount); |
| } |
| |
| ByteBuffer result = ByteBuffer.wrap(baos.toByteArray()); |
| return result; |
| } finally { |
| inputStream.close(); |
| } |
| } |
| |
| private ByteArrayOutputStream getOutputBuffer(int suggestedLength) { |
| if (null == outputBuffer) |
| outputBuffer = new ByteArrayOutputStream(suggestedLength); |
| outputBuffer.reset(); |
| return outputBuffer; |
| } |
| |
| } |