package com.datastax.oss.driver.internal.core.protocol;
import com.datastax.oss.protocol.internal.Compressor;
import io.netty.buffer.ByteBuf;
import java.nio.ByteBuffer;
import net.jcip.annotations.ThreadSafe;
@ThreadSafe
public abstract class ByteBufCompressor implements Compressor<ByteBuf> {
@Override
public ByteBuf compress(ByteBuf uncompressed) {
return uncompressed.isDirect()
? compressDirect(uncompressed, true)
: compressHeap(uncompressed, true);
}
@Override
public ByteBuf compressWithoutLength(ByteBuf uncompressed) {
return uncompressed.isDirect()
? compressDirect(uncompressed, false)
: compressHeap(uncompressed, false);
}
protected abstract ByteBuf compressDirect(ByteBuf input, boolean prependWithUncompressedLength);
protected abstract ByteBuf compressHeap(ByteBuf input, boolean prependWithUncompressedLength);
@Override
public ByteBuf decompress(ByteBuf compressed) {
return decompressWithoutLength(compressed, readUncompressedLength(compressed));
}
protected abstract int readUncompressedLength(ByteBuf compressed);
@Override
public ByteBuf decompressWithoutLength(ByteBuf compressed, int uncompressedLength) {
return compressed.isDirect()
? decompressDirect(compressed, uncompressedLength)
: decompressHeap(compressed, uncompressedLength);
}
protected abstract ByteBuf decompressDirect(ByteBuf input, int uncompressedLength);
protected abstract ByteBuf decompressHeap(ByteBuf input, int uncompressedLength);
protected static ByteBuffer inputNioBuffer(ByteBuf buf) {
int index = buf.readerIndex();
int len = buf.readableBytes();
return buf.nioBufferCount() == 1
? buf.internalNioBuffer(index, len)
: buf.nioBuffer(index, len);
}
protected static ByteBuffer outputNioBuffer(ByteBuf buf) {
int index = buf.writerIndex();
int len = buf.writableBytes();
return buf.nioBufferCount() == 1
? buf.internalNioBuffer(index, len)
: buf.nioBuffer(index, len);
}
}