| /* |
| * 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 |
| * |
| * https://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.avro.file; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.avro.util.NonCopyingByteArrayOutputStream; |
| import org.apache.commons.compress.compressors.xz.XZCompressorInputStream; |
| import org.apache.commons.compress.compressors.xz.XZCompressorOutputStream; |
| import org.apache.commons.compress.utils.IOUtils; |
| |
| /** * Implements xz compression and decompression. */ |
| public class XZCodec extends Codec { |
| public final static int DEFAULT_COMPRESSION = 6; |
| private static final int DEFAULT_BUFFER_SIZE = 8192; |
| |
| static class Option extends CodecFactory { |
| private int compressionLevel; |
| |
| Option(int compressionLevel) { |
| this.compressionLevel = compressionLevel; |
| } |
| |
| @Override |
| protected Codec createInstance() { |
| return new XZCodec(compressionLevel); |
| } |
| } |
| |
| private int compressionLevel; |
| |
| public XZCodec(int compressionLevel) { |
| this.compressionLevel = compressionLevel; |
| } |
| |
| @Override |
| public String getName() { |
| return DataFileConstants.XZ_CODEC; |
| } |
| |
| @Override |
| public ByteBuffer compress(ByteBuffer data) throws IOException { |
| NonCopyingByteArrayOutputStream baos = new NonCopyingByteArrayOutputStream(DEFAULT_BUFFER_SIZE); |
| try (OutputStream outputStream = new XZCompressorOutputStream(baos, compressionLevel)) { |
| outputStream.write(data.array(), computeOffset(data), data.remaining()); |
| } |
| return baos.asByteBuffer(); |
| } |
| |
| @Override |
| public ByteBuffer decompress(ByteBuffer data) throws IOException { |
| NonCopyingByteArrayOutputStream baos = new NonCopyingByteArrayOutputStream(DEFAULT_BUFFER_SIZE); |
| InputStream bytesIn = new ByteArrayInputStream(data.array(), computeOffset(data), data.remaining()); |
| |
| try (InputStream ios = new XZCompressorInputStream(bytesIn)) { |
| IOUtils.copy(ios, baos); |
| } |
| return baos.asByteBuffer(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return compressionLevel; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null || obj.getClass() != getClass()) |
| return false; |
| XZCodec other = (XZCodec) obj; |
| return (this.compressionLevel == other.compressionLevel); |
| } |
| |
| @Override |
| public String toString() { |
| return getName() + "-" + compressionLevel; |
| } |
| } |