org.apache.parquet.hadoop.codec.NonBlockedDecompressorStream Maven / Gradle / Ivy
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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
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*/
package org.apache.parquet.hadoop.codec;
import java.io.IOException;
import java.io.InputStream;
import org.apache.hadoop.io.compress.Decompressor;
import org.apache.hadoop.io.compress.DecompressorStream;
/**
* DecompressorStream class that should be used instead of the default hadoop DecompressorStream
* 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 NonBlockedDecompressorStream extends DecompressorStream {
private boolean inputHandled;
public NonBlockedDecompressorStream(InputStream stream, Decompressor decompressor, int bufferSize) throws IOException {
super(stream, decompressor, bufferSize);
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
if (!inputHandled) {
// Send all the compressed input to the decompressor.
while (true) {
int compressedBytes = getCompressedData();
if (compressedBytes == -1) break;
decompressor.setInput(buffer, 0, compressedBytes);
}
inputHandled = true;
}
int decompressedBytes = decompressor.decompress(b, off, len);
if (decompressor.finished()) {
decompressor.reset();
}
return decompressedBytes;
}
}