net.sourceforge.plantuml.code.CompressionHuffman Maven / Gradle / Ivy
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package net.sourceforge.plantuml.code;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
public class CompressionHuffman implements Compression {
// ::remove file when __CORE__
public byte[] compress(byte[] in) {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final Deflater deflater = new Deflater(Deflater.HUFFMAN_ONLY);
deflater.setLevel(9);
final DeflaterOutputStream gz = new DeflaterOutputStream(baos, deflater);
try {
gz.write(in);
gz.close();
baos.close();
return baos.toByteArray();
} catch (IOException e) {
throw new IllegalStateException(e.toString());
}
}
public ByteArray decompress(byte[] in) throws NoPlantumlCompressionException {
try {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final ByteArrayInputStream bais = new ByteArrayInputStream(in);
final InflaterInputStream gz = new InflaterInputStream(bais);
int read;
while ((read = gz.read()) != -1) {
baos.write(read);
}
gz.close();
bais.close();
baos.close();
return ByteArray.from(baos.toByteArray());
} catch (IOException e) {
// System.err.println("Not Huffman");
throw new NoPlantumlCompressionException(e);
}
}
}