org.apache.hadoop.io.compress.DefaultCodec.java Source code

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Here is the source code for org.apache.hadoop.io.compress.DefaultCodec.java

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/*
 * 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.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.ZlibDecompressor;
import org.apache.hadoop.io.compress.zlib.ZlibFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_DEFAULT;
import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_KEY;

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class DefaultCodec implements Configurable, CompressionCodec, DirectDecompressionCodec {
    private static final Logger LOG = LoggerFactory.getLogger(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 {
        return CompressionCodec.Util.createOutputStreamWithCodecPool(this, conf, out);
    }

    @Override
    public CompressionOutputStream createOutputStream(OutputStream out, Compressor compressor) throws IOException {
        return new CompressorStream(out, compressor,
                conf.getInt(IO_FILE_BUFFER_SIZE_KEY, IO_FILE_BUFFER_SIZE_DEFAULT));
    }

    @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 CompressionCodec.Util.createInputStreamWithCodecPool(this, conf, in);
    }

    @Override
    public CompressionInputStream createInputStream(InputStream in, Decompressor decompressor) throws IOException {
        return new DecompressorStream(in, decompressor,
                conf.getInt(IO_FILE_BUFFER_SIZE_KEY, IO_FILE_BUFFER_SIZE_DEFAULT));
    }

    @Override
    public Class<? extends Decompressor> getDecompressorType() {
        return ZlibFactory.getZlibDecompressorType(conf);
    }

    @Override
    public Decompressor createDecompressor() {
        return ZlibFactory.getZlibDecompressor(conf);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public DirectDecompressor createDirectDecompressor() {
        return ZlibFactory.getZlibDirectDecompressor(conf);
    }

    @Override
    public String getDefaultExtension() {
        return ".deflate";
    }

}