001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *       http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License. 
018 *
019 */
020
021package org.apache.directory.server.dhcp.options;
022
023
024/**
025 * The Dynamic Host Configuration Protocol (DHCP) provides a framework for
026 * passing configuration information to hosts on a TCP/IP network. Configuration
027 * parameters and other control information are carried in tagged data items
028 * that are stored in the 'options' field of the DHCP message. The data items
029 * themselves are also called "options."
030 * 
031 * This abstract base class is for options that carry an unsigned short value
032 * (16 bit).
033 * 
034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
035 */
036public abstract class ShortOption extends DhcpOption
037{
038    /**
039     * The short value (represented as an int because of the unsignedness).
040     */
041    private int shortValue;
042
043
044    /*
045     * @see org.apache.directory.server.dhcp.options.DhcpOption#setData(byte[])
046     */
047    @Override
048    public void setData( byte[] data )
049    {
050        shortValue = ( data[0] & 0xff ) << 8 | ( data[1] & 0xff );
051    }
052
053
054    /*
055     * @see org.apache.directory.server.dhcp.options.DhcpOption#getData()
056     */
057    @Override
058    public byte[] getData()
059    {
060        return new byte[]
061            { ( byte ) ( shortValue >> 8 & 0xff ),
062                ( byte ) ( shortValue & 0xff ) };
063    }
064
065
066    public int getShortValue()
067    {
068        return shortValue;
069    }
070
071
072    public void setShortValue( int shortValue )
073    {
074        this.shortValue = shortValue;
075    }
076}