InMemoryRegistryImpl xref

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1   /*
2   * Licensed to the Apache Software Foundation (ASF) under one or more
3   * contributor license agreements.  See the NOTICE file distributed with
4   * this work for additional information regarding copyright ownership.
5   * The ASF licenses this file to You under the Apache License, Version 2.0
6   * (the "License"); you may not use this file except in compliance with
7   * the License.  You may obtain a copy of the License at
8   *
9   *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17  /***
18   * Created on Jan 13, 2004
19   *
20   * 
21   * @author
22   */
23  package org.apache.jetspeed.deployment.simpleregistry.impl;
24  
25  import java.util.Collection;
26  import java.util.HashMap;
27  import java.util.Map;
28  
29  import org.apache.jetspeed.deployment.simpleregistry.Entry;
30  import org.apache.jetspeed.deployment.simpleregistry.SimpleRegistry;
31  import org.apache.jetspeed.deployment.simpleregistry.SimpleRegistryException;
32  
33  /***
34   * <p>
35   * InMemoryRegistryImpl
36   * </p>
37   * 
38   * @author <a href="mailto:weaver@apache.org">Scott T. Weaver</a>
39   * @version $Id: InMemoryRegistryImpl.java 516881 2007-03-11 10:34:21Z ate $
40   *
41   */
42  public class InMemoryRegistryImpl implements SimpleRegistry
43  {
44  	protected Map registry;
45  	
46  	public InMemoryRegistryImpl()
47  	{
48  		super();
49  		registry = new HashMap();
50  	}
51  
52      /***
53       * @see org.apache.jetspeed.cps.simpleregistry.SimpleRegistry#register(org.apache.jetspeed.cps.simpleregistry.Entry)
54       */
55      public void register(Entry entry) throws SimpleRegistryException
56      {
57      	checkArguments(entry);	
58          if(!isRegistered(entry))
59          {
60          	registry.put(entry.getId(), entry);
61          }
62          else
63          {
64          	throw new SimpleRegistryException(entry.getId()+" is already registered.");
65          }
66  
67      }
68  
69      /***
70       * @see org.apache.jetspeed.cps.simpleregistry.SimpleRegistry#deRegister(org.apache.jetspeed.cps.simpleregistry.Entry)
71       */
72      public void deRegister(Entry entry)
73      {
74          checkArguments(entry);
75          registry.remove(entry.getId());
76  
77      }
78  
79      /***
80       * @see org.apache.jetspeed.cps.simpleregistry.SimpleRegistry#isRegistered(org.apache.jetspeed.cps.simpleregistry.Entry)
81       */
82      public boolean isRegistered(Entry entry)
83      {        
84      	checkArguments(entry);
85          return registry.containsKey(entry.getId());
86      }
87  
88      /***
89       * @see org.apache.jetspeed.cps.simpleregistry.SimpleRegistry#getRegistry()
90       */
91      public Collection getRegistry()
92      {
93          return registry.values();
94      }
95      
96      protected void checkArguments(Entry entry)
97      {
98      	if(entry == null )
99      	{
100     		throw new IllegalArgumentException("Entry cannot be null.");
101     	}
102     	
103 		if(entry.getId() == null )
104 		{
105 			throw new IllegalArgumentException("Entry.getId() cannot be null.");
106 		}
107     }
108 
109 }