trunk/protocol-dhcp/src/main/java/org/apache/directory/server/dhcp/options/IntOption.java

/*
 * 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.options;


/**
 * The Dynamic Host Configuration Protocol (DHCP) provides a framework for
 * passing configuration information to hosts on a TCP/IP network. Configuration
 * parameters and other control information are carried in tagged data items
 * that are stored in the 'options' field of the DHCP message. The data items
 * themselves are also called "options."
 * 
 * This abstract base class is for options that carry a short value (16 bit).
 * 
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
public abstract class IntOption extends DhcpOption
{
    /**
     * The int value (represented as a long because of the unsignedness).
     */
    private long intValue;


    /*
     * @see org.apache.directory.server.dhcp.options.DhcpOption#setData(byte[])
     */
    public void setData( byte[] data )
    {
        intValue = ( data[0] & 0xff ) << 24 | ( data[1] & 0xff ) << 16
            | ( data[2] & 0xff ) << 8 | ( data[3] & 0xff );
    }


    /*
     * @see org.apache.directory.server.dhcp.options.DhcpOption#getData()
     */
    public byte[] getData()
    {
        return new byte[]
            { ( byte ) ( intValue >> 24 & 0xff ),
                ( byte ) ( intValue >> 16 & 0xff ), ( byte ) ( intValue >> 8 & 0xff ),
                ( byte ) ( intValue & 0xff ) };
    }


    public long getIntValue()
    {
        return intValue;
    }


    public void setIntValue( long intValue )
    {
        this.intValue = intValue;
    }
}