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jsync.io is a non-blocking, event-driven networking framework for Java
There is a newer version: 1.10.13
/*
 * 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.jsync.http.impl;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.DecoderResult;
import io.netty.handler.codec.http.*;

/**
 * Helper wrapper class which allows to assemble a LastHttpContent and a HttpResponse into one "packet" and so more
 * efficient write it through the pipeline.
 *
 * @author Norman Maurer
 */
class AssembledFullHttpResponse extends AssembledHttpResponse implements FullHttpResponse {

    public AssembledFullHttpResponse(HttpResponse response, LastHttpContent content) {
        this(response, content.content(), content.trailingHeaders(), content.getDecoderResult());
    }

    public AssembledFullHttpResponse(HttpResponse response) {
        this(response, Unpooled.EMPTY_BUFFER);
    }

    public AssembledFullHttpResponse(HttpResponse response, ByteBuf buf) {
        super(response, toLastContent(buf, null, DecoderResult.SUCCESS));
    }

    public AssembledFullHttpResponse(HttpResponse response, ByteBuf buf, HttpHeaders trailingHeaders, DecoderResult result) {
        super(response, toLastContent(buf, trailingHeaders, result));
    }

    private static LastHttpContent toLastContent(ByteBuf buf, HttpHeaders trailingHeaders, DecoderResult result) {
        if (buf.isReadable()) {
            if (trailingHeaders == null) {
                return new DefaultLastHttpContent(buf);
            } else {
                return new AssembledLastHttpContent(buf, trailingHeaders, result);
            }
        } else {
            if (trailingHeaders == null) {
                return LastHttpContent.EMPTY_LAST_CONTENT;
            } else {
                return new AssembledLastHttpContent(Unpooled.EMPTY_BUFFER, trailingHeaders, result);
            }
        }
    }

    @Override
    public AssembledFullHttpResponse setStatus(HttpResponseStatus status) {
        super.setStatus(status);
        return this;
    }

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

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

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

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

    @Override
    public AssembledFullHttpResponse setProtocolVersion(HttpVersion version) {
        super.setProtocolVersion(version);
        return this;
    }

    @Override
    public HttpHeaders trailingHeaders() {
        return ((LastHttpContent) content).trailingHeaders();
    }
}