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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *
10   *       http://www.apache.org/licenses/LICENSE-2.0
11   *
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *
19   */
20  
21  package org.apache.directory.server.dhcp.options;
22  
23  /**
24   * The Dynamic Host Configuration Protocol (DHCP) provides a framework for
25   * passing configuration information to hosts on a TCP/IP network. Configuration
26   * parameters and other control information are carried in tagged data items
27   * that are stored in the 'options' field of the DHCP message. The data items
28   * themselves are also called "options."
29   * 
30   * This abstract base class is for options that carry an unsigned short value
31   * (16 bit).
32   * 
33   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
34   * @version $Rev: 551805 $, $Date: 2007-06-29 00:57:04 -0500 (Fr, 29 Jun 2007) $
35   */
36  public abstract class ShortOption extends DhcpOption {
37      /**
38       * The short value (represented as an int because of the unsignedness).
39       */
40      private int shortValue;
41  
42      /*
43       * @see org.apache.directory.server.dhcp.options.DhcpOption#setData(byte[])
44       */
45      public void setData(byte[] data) {
46          shortValue = (data[0] & 0xff) << 8 | (data[1] & 0xff);
47      }
48  
49      /*
50       * @see org.apache.directory.server.dhcp.options.DhcpOption#getData()
51       */
52      public byte[] getData() {
53          return new byte[]{(byte) (shortValue >> 8 & 0xff),
54                  (byte) (shortValue & 0xff)};
55      }
56  
57      public int getShortValue() {
58          return shortValue;
59      }
60  
61      public void setShortValue(int shortValue) {
62          this.shortValue = shortValue;
63      }
64  }