Hadoop CompressionCodec for com.ning.compress-lzf

LZFCodec

import com.ning.compress.lzf.LZFInputStream;
import com.ning.compress.lzf.LZFOutputStream;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.CompressionInputStream;
import org.apache.hadoop.io.compress.CompressionOutputStream;
import org.apache.hadoop.io.compress.Compressor;
import org.apache.hadoop.io.compress.Decompressor;

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

public class LZFCodec implements CompressionCodec
{
    @Override
    public CompressionOutputStream createOutputStream(OutputStream out)
            throws IOException
    {
        return new LZFCompressionOutputStream(out);
    }

    @Override
    public CompressionOutputStream createOutputStream(OutputStream out, Compressor compressor)
            throws IOException
    {
        return createOutputStream(out);
    }

    @Override
    public Class<? extends Compressor> getCompressorType()
    {
        return LZFDummyCompressor.class;
    }

    @Override
    public LZFDummyCompressor createCompressor()
    {
        return new LZFDummyCompressor();
    }

    @Override
    public CompressionInputStream createInputStream(InputStream in)
            throws IOException
    {
        throw new UnsupportedOperationException();
    }

    @Override
    public CompressionInputStream createInputStream(InputStream in, Decompressor decompressor)
            throws IOException
    {
        throw new UnsupportedOperationException();
    }

    @Override
    public Class<? extends Decompressor> getDecompressorType()
    {
        return LZFDummyDecompressor.class;
    }

    @Override
    public Decompressor createDecompressor()
    {
        return new LZFDummyDecompressor();
    }

    @Override
    public String getDefaultExtension()
    {
        return ".lzf";
    }

    private static class LZFCompressionInputStream extends CompressionInputStream
    {

        private LZFInputStream input;

        public LZFCompressionInputStream(InputStream in)
                throws IOException
        {
            super(in);
            input = new LZFInputStream(super.in);
        }

        public void close()
                throws IOException
        {
            input.close();
        }

        public int read(byte[] b, int off, int len)
                throws IOException
        {
            return input.read(b, off, len);

        }

        public void resetState()
                throws IOException
        {
            input = new LZFInputStream(super.in);
        }

        public int read()
                throws IOException
        {
            return input.read();
        }
    }

    private static class LZFCompressionOutputStream extends CompressionOutputStream
    {
        private final LZFOutputStream output;
        private boolean needsFlush;

        public LZFCompressionOutputStream(OutputStream out)
                throws IOException
        {
            super(out);
            output = new LZFOutputStream(out);
        }

        public void finish()
                throws IOException
        {
            output.flush();
            needsFlush = true;
        }

        private void flushIfNeeded()
                throws IOException
        {
            if (needsFlush) {
                if (output != null) {
                    output.flush();
                }
                needsFlush = false;
            }
        }

        public void resetState()
                throws IOException
        {
            // Cannot write to out at this point because out might not be ready
            // yet, as in SequenceFile.Writer implementation.
            needsFlush = true;
        }

        public void write(int b)
                throws IOException
        {
            flushIfNeeded();

            output.write(b);
        }

        public void write(byte[] b, int off, int len)
                throws IOException
        {
            flushIfNeeded();

            output.write(b, off, len);
        }

        public void close()
                throws IOException
        {
            flushIfNeeded();

            output.flush();
            output.close();
            needsFlush = true;
        }
    }

    public static class LZFDummyCompressor implements Compressor
    {
        @Override
        public void setInput(byte[] b, int off, int len)
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public boolean needsInput()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void setDictionary(byte[] b, int off, int len)
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public long getBytesRead()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public long getBytesWritten()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void finish()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public boolean finished()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public int compress(byte[] b, int off, int len)
                throws IOException
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void reset()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void end()
        {
            throw new UnsupportedOperationException();
        }
    }

    public static class LZFDummyDecompressor implements Decompressor
    {
        @Override
        public void setInput(byte[] b, int off, int len)
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public boolean needsInput()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void setDictionary(byte[] b, int off, int len)
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public boolean needsDictionary()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public boolean finished()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public int decompress(byte[] b, int off, int len)
                throws IOException
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void reset()
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void end()
        {
            throw new UnsupportedOperationException();
        }
    }

}