01: /**
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. You may obtain a copy of the License at
09: *
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: */package org.apache.cxf.bus.extension;
19:
20: import java.util.concurrent.ConcurrentHashMap;
21:
22: public class DeferredMap<V> extends ConcurrentHashMap<String, V> {
23:
24: ExtensionManager em;
25: Class<V> type;
26:
27: public DeferredMap(ExtensionManagerImpl em, Class<V> type) {
28: this .em = em;
29:
30: this .type = type;
31: }
32:
33: @Override
34: public V get(Object key) {
35: // TODO Auto-generated method stub
36: V v = super .get(key);
37:
38: if (v == null) {
39: String k = (String) key;
40: em.activateViaNS(k);
41:
42: v = em.getExtension(k, type);
43: if (v != null) {
44: put(k, v);
45: }
46: }
47:
48: return v;
49: }
50: }
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