1 /*
2 * Copyright 2006-2007 the original author or authors.
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
17 package net.sf.ezmorph.object;
18
19 import net.sf.ezmorph.MorphException;
20 import net.sf.ezmorph.ObjectMorpher;
21
22 /**
23 * Morphs to a Class.<br>
24 * This morpher is a singleton.
25 *
26 * @author Andres Almiray <aalmiray@users.sourceforge.net>
27 */
28 public final class ClassMorpher implements ObjectMorpher
29 {
30 private static final ClassMorpher INSTANCE = new ClassMorpher();
31
32 /**
33 * Returns the singleton instance
34 */
35 public static ClassMorpher getInstance()
36 {
37 return INSTANCE;
38 }
39
40 private ClassMorpher()
41 {
42 }
43
44 public boolean equals( Object obj )
45 {
46 return INSTANCE == obj;
47 }
48
49 public int hashCode()
50 {
51 return 42 + getClass().hashCode();
52 }
53
54 public Object morph( Object value )
55 {
56 if( value == null ){
57 return null;
58 }
59
60 if( value instanceof Class ){
61 return (Class) value;
62 }
63
64 if( "null".equals( value ) ){
65 return null;
66 }
67
68 try{
69 return Class.forName( value.toString() );
70 }
71 catch( Exception e ){
72 throw new MorphException( e );
73 }
74 }
75
76 public Class morphsTo()
77 {
78 return Class.class;
79 }
80
81 public boolean supports( Class clazz )
82 {
83 return true;
84 }
85 }