src/main/org/apache/ant/compress/util/GZipStreamFactory.java

/*
 *  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.ant.compress.util;

import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;

import org.apache.commons.compress.compressors.CompressorInputStream;
import org.apache.commons.compress.compressors.CompressorOutputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream;

/**
 * Creates streams for the supported compression formats.
 */
public class GZipStreamFactory implements CompressorWithConcatenatedStreamsFactory {

    /**
     * @param stream the stream to read from, should be buffered
     */
    @Override
    public CompressorInputStream getCompressorStream(InputStream stream)
        throws IOException {
        return getCompressorStream(stream, false);
    }

    /**
     * @param stream the stream to read from, should be buffered
     * @param       decompressConcatenated
     *                          if true, decompress until the end of the
     *                          input; if false, stop after the first
     *                          stream
     * @since Apache Compress Antlib 1.2
     */
    @Override
    public CompressorInputStream getCompressorStream(InputStream stream,
                                                     boolean decompressConcatenated)
        throws IOException {
        return new GzipCompressorInputStream(stream, decompressConcatenated);
    }


    /**
     * @param stream the stream to write to, should be buffered
     */
    @Override
    public CompressorOutputStream getCompressorStream(OutputStream stream)
        throws IOException {
        return new GzipCompressorOutputStream(stream);
    }
}