Compressing Output Stream

package com.nmmc.dms.utils.compression;

import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;

public class CompressingOutputStream extends DeflaterOutputStream {

    public CompressingOutputStream(final OutputStream out) {
        super(out, new Deflater(Deflater.BEST_COMPRESSION, true),4*1024);
    }

    private static final byte[] EMPTYBYTEARRAY = new byte[0];

    /**
     * Insure all remaining data will be output.
     */
    public void flush() throws IOException {
        /**
         * Now this is tricky: We force the Deflater to flush its data by
         * switching compression level. As yet, a perplexingly simple workaround
         * for
         *
         * http://developer.java.sun.com/developer/bugParade/bugs/42557 43.html
         */
        def.setInput(EMPTYBYTEARRAY, 0, 0);

        def.setLevel(Deflater.NO_COMPRESSION);
        deflate();

        def.setLevel(Deflater.DEFAULT_COMPRESSION);
        deflate();

        out.flush();
    }
} // class