/*
 * Copyright 2012 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 SpdyGoAwayFrame} implementation.
 */
public class DefaultSpdyGoAwayFrame implements SpdyGoAwayFrame {

    private int lastGoodStreamID;

    /**
     * Creates a new instance.
     *
     * @param lastGoodStreamID the Last-good-stream-ID of this frame
     */
    public DefaultSpdyGoAwayFrame(int lastGoodStreamID) {
        setLastGoodStreamID(lastGoodStreamID);
    }

    public int getLastGoodStreamID() {
        return lastGoodStreamID;
    }

    public void setLastGoodStreamID(int lastGoodStreamID) {
        if (lastGoodStreamID < 0) {
            throw new IllegalArgumentException("Last-good-stream-ID"
                    + " cannot be negative: " + lastGoodStreamID);
        }
        this.lastGoodStreamID = lastGoodStreamID;
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder();
        buf.append(getClass().getSimpleName());
        buf.append(StringUtil.NEWLINE);
        buf.append("--> Last-good-stream-ID = ");
        buf.append(lastGoodStreamID);
        return buf.toString();
    }
}