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/*
 * Copyright (c) 2011-2013 The original author or authors
 * ------------------------------------------------------
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Apache License v2.0 which accompanies this distribution.
 *
 *     The Eclipse Public License is available at
 *     http://www.eclipse.org/legal/epl-v10.html
 *
 *     The Apache License v2.0 is available at
 *     http://www.opensource.org/licenses/apache2.0.php
 *
 * You may elect to redistribute this code under either of these licenses.
 */
package io.vertx.core.http.impl;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.DefaultByteBufHolder;
import io.netty.handler.codec.DecoderResult;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.LastHttpContent;

/**
 * Helper wrapper class which allows to assemble a ByteBuf and a HttpHeaders into one "packet" and so more
 * efficient write it through the pipeline.
 *
 * @author Norman Maurer
 */
class AssembledLastHttpContent extends DefaultByteBufHolder implements LastHttpContent {
  private final HttpHeaders trailingHeaders;
  private DecoderResult result;
  public AssembledLastHttpContent(ByteBuf buf, HttpHeaders trailingHeaders, DecoderResult result) {
    super(buf);
    this.trailingHeaders = trailingHeaders;
    this.result = result;
  }

  @Override
  public HttpHeaders trailingHeaders() {
    return trailingHeaders;
  }

  @Override
  public LastHttpContent copy() {
    throw new UnsupportedOperationException();
  }

  @Override
  public LastHttpContent retain(int increment) {
    super.retain(increment);
    return this;
  }

  @Override
  public LastHttpContent retain() {
    super.retain();
    return this;
  }

  @Override
  public HttpContent duplicate() {
    throw new UnsupportedOperationException();
  }

  @Override
  public DecoderResult getDecoderResult() {
    return result;
  }

  @Override
  public void setDecoderResult(DecoderResult result) {
    this.result = result;
  }
}