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The Netty project is an effort to provide an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

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/*
 * Copyright 2013 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package org.jboss.netty.handler.codec.spdy;

import org.jboss.netty.util.internal.StringUtil;

/**
 * The default {@link SpdyWindowUpdateFrame} implementation.
 */
public class DefaultSpdyWindowUpdateFrame implements SpdyWindowUpdateFrame {

    private int streamId;
    private int deltaWindowSize;

    /**
     * Creates a new instance.
     *
     * @param streamId        the Stream-ID of this frame
     * @param deltaWindowSize the Delta-Window-Size of this frame
     */
    public DefaultSpdyWindowUpdateFrame(int streamId, int deltaWindowSize) {
        setStreamId(streamId);
        setDeltaWindowSize(deltaWindowSize);
    }

    public int getStreamId() {
        return streamId;
    }

    public void setStreamId(int streamId) {
        if (streamId < 0) {
            throw new IllegalArgumentException(
                    "Stream-ID cannot be negative: " + streamId);
        }
        this.streamId = streamId;
    }

    public int getDeltaWindowSize() {
        return deltaWindowSize;
    }

    public void setDeltaWindowSize(int deltaWindowSize) {
        if (deltaWindowSize <= 0) {
            throw new IllegalArgumentException(
                    "Delta-Window-Size must be positive: " +
                    deltaWindowSize);
        }
        this.deltaWindowSize = deltaWindowSize;
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder();
        buf.append(getClass().getSimpleName());
        buf.append(StringUtil.NEWLINE);
        buf.append("--> Stream-ID = ");
        buf.append(getStreamId());
        buf.append(StringUtil.NEWLINE);
        buf.append("--> Delta-Window-Size = ");
        buf.append(getDeltaWindowSize());
        return buf.toString();
    }
}