| /* |
| * 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; |
| |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| |
| /** |
| * 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." |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class OptionsField |
| { |
| /** |
| * A map of option code (Integer)->DhcpOption. FIXME: use IntHashtable from |
| * commons collections |
| */ |
| private Map options = new HashMap(); |
| |
| |
| public void add( DhcpOption option ) |
| { |
| options.put( Integer.valueOf( option.getTag() ), option ); |
| } |
| |
| |
| public boolean isEmpty() |
| { |
| return options.isEmpty(); |
| } |
| |
| |
| public Iterator iterator() |
| { |
| return options.values().iterator(); |
| } |
| |
| |
| /** |
| * Return the (first) DHCP option matching a given option class or |
| * <code>null</code> of the option isn't set. |
| * |
| * @param optionClass |
| */ |
| public DhcpOption get( Class optionClass ) |
| { |
| Integer key = Integer.valueOf( DhcpOption.getTagByClass( optionClass ) ); |
| return ( DhcpOption ) options.get( key ); |
| } |
| |
| |
| /** |
| * Return the (first) DHCP option matching a given tag or <code>null</code> |
| * of the option isn't set. |
| * |
| * @param tag |
| */ |
| public DhcpOption get( int tag ) |
| { |
| Integer key = Integer.valueOf( tag ); |
| return ( DhcpOption ) options.get( key ); |
| } |
| |
| |
| /** |
| * Merge the options from the given options field into my options. Existing |
| * options are replaced by the ones from the supplied options field. |
| * |
| * @param options |
| */ |
| public void merge( OptionsField options ) |
| { |
| if ( null == options ) |
| { |
| return; |
| } |
| |
| for ( Iterator i = options.iterator(); i.hasNext(); ) |
| { |
| DhcpOption option = ( DhcpOption ) i.next(); |
| this.options.put( Integer.valueOf( option.getTag() ), option ); |
| } |
| } |
| |
| |
| /** |
| * Remove instances of the given option class. |
| * |
| * @param c |
| */ |
| public void remove( Class c ) |
| { |
| Integer key = Integer.valueOf( DhcpOption.getTagByClass( c ) ); |
| options.remove( key ); |
| } |
| |
| |
| /** |
| * Remove options matching the given tag |
| * |
| * @param tag |
| */ |
| public void remove( int tag ) |
| { |
| Integer key = Integer.valueOf( tag ); |
| options.remove( key ); |
| } |
| |
| |
| /** |
| * @see Map#clear() |
| */ |
| public void clear() |
| { |
| options.clear(); |
| } |
| } |