/*
 * Copyright 2015 Open Networking Laboratory
 *
 * Licensed 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.onosproject.pcepio.types;

import org.jboss.netty.buffer.ChannelBuffer;
import org.onlab.util.Identifier;
import org.onosproject.pcepio.protocol.PcepNai;

/**
 * Provides Pcep Nai Ipv4 Node Id.
 */
public class PcepNaiIpv4NodeId extends Identifier<Integer> implements PcepNai {

    public static final byte ST_TYPE = 0x01;

    /**
     * Constructor to initialize ipv4NodeId.
     *
     * @param value ipv4 node id
     */
    public PcepNaiIpv4NodeId(int value) {
        super(value);
    }

    /**
     * Returns an object of PcepNaiIpv4NodeId.
     *
     * @param value ipv4 node id
     * @return object of PcepNaiIpv4NodeId
     */
    public static PcepNaiIpv4NodeId of(int value) {
        return new PcepNaiIpv4NodeId(value);
    }

    @Override
    public byte getType() {
        return ST_TYPE;
    }

    @Override
    public int write(ChannelBuffer bb) {
        int iLenStartIndex = bb.writerIndex();
        bb.writeInt(identifier);
        return bb.writerIndex() - iLenStartIndex;
    }

    /**
     * Reads from the channel buffer and returns object of PcepNAIIpv4NodeIdVer1.
     *
     * @param bb of channel buffer.
     * @return object of PcepNAIIpv4NodeIdVer1
     */
    public static PcepNaiIpv4NodeId read(ChannelBuffer bb) {
        return new PcepNaiIpv4NodeId(bb.readInt());
    }
}