1 /*
2 * Copyright 2003-2004 The Apache Software Foundation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.apache.commons.convert1.util;
17
18 import java.util.HashMap;
19 import java.util.Iterator;
20
21 /**
22 * A map which stores objects by a key Class.
23 * When obtaining the object, it will check inheritence and
24 * interface trees to see if the Class matches.
25 */
26 public class ClassMap extends ProxyMap {
27
28 private Inheritor inh;
29
30 public ClassMap() {
31 this(new BasicInheritor());
32 }
33
34 public ClassMap(Inheritor inh) {
35 super(new HashMap());
36 this.inh = inh;
37 }
38
39 public Inheritor getInheritor() {
40 return inh;
41 }
42
43 /**
44 * Get the object from the map. If the key is not
45 * a Class object, then it uses the Class of the object.
46 */
47 public Object get(Object key) {
48 if(key == null) {
49 return null;
50 }
51 Class clss = null;
52
53 if(key instanceof Class) {
54 clss = (Class) key;
55 } else {
56 clss = key.getClass();
57 }
58
59 Object obj = super.get(clss);
60
61 if(obj == null) {
62
63 inh.setTarget(clss);
64 Iterator itr = inh.iterator();
65 while(itr.hasNext() && obj == null) {
66 obj = super.get(itr.next());
67 }
68 }
69
70 return obj;
71 }
72
73 }