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Lz4Compression.java
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Lz4Compression.java
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/**
* Copyright (c) 2017, Stephan Saalfeld
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.janelia.saalfeldlab.n5;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.janelia.saalfeldlab.n5.Compression.CompressionType;
import net.jpountz.lz4.LZ4BlockInputStream;
import net.jpountz.lz4.LZ4BlockOutputStream;
@CompressionType("lz4")
public class Lz4Compression implements DefaultBlockReader, DefaultBlockWriter, Compression {
private static final long serialVersionUID = -9071316415067427256L;
@CompressionParameter
private final int blockSize;
public Lz4Compression(final int blockSize) {
this.blockSize = blockSize;
}
public Lz4Compression() {
this(1 << 16);
}
@Override
public InputStream getInputStream(final InputStream in) throws IOException {
return new LZ4BlockInputStream(in);
}
@Override
public OutputStream getOutputStream(final OutputStream out) throws IOException {
return new LZ4BlockOutputStream(out, blockSize);
}
@Override
public Lz4Compression getReader() {
return this;
}
@Override
public Lz4Compression getWriter() {
return this;
}
@Override
public boolean equals(final Object other) {
if (other == null || other.getClass() != Lz4Compression.class)
return false;
else
return blockSize == ((Lz4Compression)other).blockSize;
}
}