parquet.hadoop.codec.NonBlockedCompressorStream.java Source code

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Here is the source code for parquet.hadoop.codec.NonBlockedCompressorStream.java

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/**
 * Copyright 2012 Twitter, Inc.
 *
 * Licensed 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 parquet.hadoop.codec;

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

import org.apache.hadoop.io.compress.Compressor;
import org.apache.hadoop.io.compress.CompressorStream;

/**
 * CompressorStream class that should be used instead of the default hadoop CompressorStream
 * object. Hadoop's compressor adds blocking ontop of the compression codec. We don't want
 * that since our Pages already solve the need to add blocking.
 */
public class NonBlockedCompressorStream extends CompressorStream {
    public NonBlockedCompressorStream(OutputStream stream, Compressor compressor, int bufferSize) {
        super(stream, compressor, bufferSize);
    }

    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        // Sanity checks
        if (compressor.finished()) {
            throw new IOException("write beyond end of stream");
        }
        if ((off | len | (off + len) | (b.length - (off + len))) < 0) {
            throw new IndexOutOfBoundsException();
        } else if (len == 0) {
            return;
        }
        compressor.setInput(b, off, len);
    }
}