Source code: org/activemq/jndi/LazyCreateContext.java
1 /**
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * 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 package org.activemq.jndi;
19
20 import javax.naming.NameNotFoundException;
21 import javax.naming.NamingException;
22
23 /**
24 * Allows users to dynamically create items
25 *
26 * @version $Revision: 1.1 $
27 */
28 public abstract class LazyCreateContext extends ReadOnlyContext {
29 public Object lookup(String name) throws NamingException {
30 try {
31 return super.lookup(name);
32 }
33 catch (NameNotFoundException e) {
34 Object answer = createEntry(name);
35 if (answer == null) {
36 throw e;
37 }
38 internalBind(name, answer);
39 return answer;
40 }
41 }
42
43 protected abstract Object createEntry(String name);
44 }