| /* |
| * 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.hadoop.io.compress; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.compress.zlib.ZlibFactory; |
| |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class DefaultCodec implements Configurable, CompressionCodec { |
| private static final Log LOG = LogFactory.getLog(DefaultCodec.class); |
| |
| Configuration conf; |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| } |
| |
| @Override |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| @Override |
| public CompressionOutputStream createOutputStream(OutputStream out) |
| throws IOException { |
| // This may leak memory if called in a loop. The createCompressor() call |
| // may cause allocation of an untracked direct-backed buffer if native |
| // libs are being used (even if you close the stream). A Compressor |
| // object should be reused between successive calls. |
| LOG.warn("DefaultCodec.createOutputStream() may leak memory. " |
| + "Create a compressor first."); |
| return new CompressorStream(out, createCompressor(), |
| conf.getInt("io.file.buffer.size", 4*1024)); |
| } |
| |
| @Override |
| public CompressionOutputStream createOutputStream(OutputStream out, |
| Compressor compressor) |
| throws IOException { |
| return new CompressorStream(out, compressor, |
| conf.getInt("io.file.buffer.size", 4*1024)); |
| } |
| |
| @Override |
| public Class<? extends Compressor> getCompressorType() { |
| return ZlibFactory.getZlibCompressorType(conf); |
| } |
| |
| @Override |
| public Compressor createCompressor() { |
| return ZlibFactory.getZlibCompressor(conf); |
| } |
| |
| @Override |
| public CompressionInputStream createInputStream(InputStream in) |
| throws IOException { |
| return new DecompressorStream(in, createDecompressor(), |
| conf.getInt("io.file.buffer.size", 4*1024)); |
| } |
| |
| @Override |
| public CompressionInputStream createInputStream(InputStream in, |
| Decompressor decompressor) |
| throws IOException { |
| return new DecompressorStream(in, decompressor, |
| conf.getInt("io.file.buffer.size", 4*1024)); |
| } |
| |
| @Override |
| public Class<? extends Decompressor> getDecompressorType() { |
| return ZlibFactory.getZlibDecompressorType(conf); |
| } |
| |
| @Override |
| public Decompressor createDecompressor() { |
| return ZlibFactory.getZlibDecompressor(conf); |
| } |
| |
| @Override |
| public String getDefaultExtension() { |
| return ".deflate"; |
| } |
| |
| } |