/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF 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.apache.directory.server.dhcp.messages;

import javax.annotation.Nonnull;

/**
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
public enum MessageType {

    DHCPUNRECOGNIZED((byte) -1, "unrecognized"),
    DHCPDISCOVER((byte) 1, "DHCP Discover"),
    DHCPOFFER((byte) 2, "DHCP Offer"),
    DHCPREQUEST((byte) 3, "DHCP Request"),
    DHCPDECLINE((byte) 4, "DHCP Decline"),
    DHCPACK((byte) 5, "DHCP Acknowledge"),
    DHCPNAK((byte) 6, "DHCP Not Acknowledge"),
    DHCPRELEASE((byte) 7, "DHCP Release"),
    DHCPINFORM((byte) 8, "DHCP Inform");
    private final String name;
    private final byte ordinal;

    /**
     * Private constructor prevents construction outside of this class.
     */
    private MessageType(byte ordinal, String name) {
        this.ordinal = ordinal;
        this.name = name;
    }

    public byte getCode() {
        return ordinal;
    }

    @Override
    public String toString() {
        return name;
    }

    @Nonnull
    public static MessageType forTypeCode(byte type) {
        for (MessageType mt : MessageType.values())
            if (type == mt.getCode())
                return mt;
        return DHCPUNRECOGNIZED;
    }
}
