io.rsocket.frame.decoder.DefaultPayloadDecoder Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rsocket-core Show documentation

Core functionality for the RSocket library

The newest version!

package io.rsocket.frame.decoder;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.rsocket.Payload;
import io.rsocket.frame.FrameHeaderCodec;
import io.rsocket.frame.FrameType;
import io.rsocket.frame.MetadataPushFrameCodec;
import io.rsocket.frame.PayloadFrameCodec;
import io.rsocket.frame.RequestChannelFrameCodec;
import io.rsocket.frame.RequestFireAndForgetFrameCodec;
import io.rsocket.frame.RequestResponseFrameCodec;
import io.rsocket.frame.RequestStreamFrameCodec;
import io.rsocket.util.DefaultPayload;
import java.nio.ByteBuffer;

/** Default Frame decoder that copies the frames contents for easy of use. */
class DefaultPayloadDecoder implements PayloadDecoder {

  @Override
  public Payload apply(ByteBuf byteBuf) {
    ByteBuf m;
    ByteBuf d;
    FrameType type = FrameHeaderCodec.frameType(byteBuf);
    switch (type) {
      case REQUEST_FNF:
        d = RequestFireAndForgetFrameCodec.data(byteBuf);
        m = RequestFireAndForgetFrameCodec.metadata(byteBuf);
        break;
      case REQUEST_RESPONSE:
        d = RequestResponseFrameCodec.data(byteBuf);
        m = RequestResponseFrameCodec.metadata(byteBuf);
        break;
      case REQUEST_STREAM:
        d = RequestStreamFrameCodec.data(byteBuf);
        m = RequestStreamFrameCodec.metadata(byteBuf);
        break;
      case REQUEST_CHANNEL:
        d = RequestChannelFrameCodec.data(byteBuf);
        m = RequestChannelFrameCodec.metadata(byteBuf);
        break;
      case NEXT:
      case NEXT_COMPLETE:
        d = PayloadFrameCodec.data(byteBuf);
        m = PayloadFrameCodec.metadata(byteBuf);
        break;
      case METADATA_PUSH:
        d = Unpooled.EMPTY_BUFFER;
        m = MetadataPushFrameCodec.metadata(byteBuf);
        break;
      default:
        throw new IllegalArgumentException("unsupported frame type: " + type);
    }

    ByteBuffer data = ByteBuffer.allocate(d.readableBytes());
    data.put(d.nioBuffer());
    data.flip();

    if (m != null) {
      ByteBuffer metadata = ByteBuffer.allocate(m.readableBytes());
      metadata.put(m.nioBuffer());
      metadata.flip();

      return DefaultPayload.create(data, metadata);
    }

    return DefaultPayload.create(data);
  }
}