1 // ========================================================================
2 // Copyright (c) 2004-2009 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // All rights reserved. This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v1.0
6 // and Apache License v2.0 which accompanies this distribution.
7 // The Eclipse Public License is available at
8 // http://www.eclipse.org/legal/epl-v10.html
9 // The Apache License v2.0 is available at
10 // http://www.opensource.org/licenses/apache2.0.php
11 // You may elect to redistribute this code under either of these licenses.
12 // ========================================================================
13
14 package org.mortbay.util.ajax;
15
16 import java.util.Map;
17
18 import org.mortbay.util.Loader;
19 import org.mortbay.util.ajax.JSON.Convertor;
20 import org.mortbay.util.ajax.JSON.Output;
21
22 /**
23 * {@link JSONPojoConvertor} factory convertor.
24 * <p>
25 * This {@link Convertor} will create and register {@link JSONPojoConvertor} instances for unknown classes.
26 *
27 */
28 public class JSONPojoConvertorFactory implements JSON.Convertor
29 {
30 private final JSON _json;
31 private final boolean _fromJSON;
32
33 /**
34 * @param json The JSON to use for conversions and registrations
35 */
36 public JSONPojoConvertorFactory(JSON json)
37 {
38 _json=json;
39 _fromJSON=true;
40 if (json==null)
41 {
42 throw new IllegalArgumentException();
43 }
44 }
45
46 /**
47 * @param json The JSON to use for conversions and registrations
48 * @param fromJSON Passed to {@link JSONPojoConvertor} constructor.
49 */
50 public JSONPojoConvertorFactory(JSON json,boolean fromJSON)
51 {
52 _json=json;
53 _fromJSON=fromJSON;
54 if (json==null)
55 {
56 throw new IllegalArgumentException();
57 }
58 }
59
60 public void toJSON(Object obj, Output out)
61 {
62 String clsName=obj.getClass().getName();
63 Convertor convertor=_json.getConvertorFor(clsName);
64 if (convertor==null)
65 {
66 try
67 {
68 Class cls=Loader.loadClass(JSON.class,clsName);
69 convertor=new JSONPojoConvertor(cls,_fromJSON);
70 _json.addConvertorFor(clsName, convertor);
71 }
72 catch (ClassNotFoundException e)
73 {
74 e.printStackTrace();
75 }
76 }
77 if (convertor!=null&&obj.getClass()!=Object.class)
78 {
79 convertor.toJSON(obj, out);
80 }
81 else
82 {
83 out.add(obj.toString());
84 }
85 }
86
87 public Object fromJSON(Map object)
88 {
89 Map map=object;
90 String clsName=(String)map.get("class");
91 if (clsName!=null)
92 {
93 Convertor convertor=_json.getConvertorFor(clsName);
94 if (convertor==null)
95 {
96 try
97 {
98 Class cls=Loader.loadClass(JSON.class,clsName);
99 convertor=new JSONPojoConvertor(cls);
100 _json.addConvertorFor(clsName, convertor);
101 }
102 catch (ClassNotFoundException e)
103 {
104 e.printStackTrace();
105 }
106 }
107 if (convertor!=null&&!clsName.equals(Object.class.getName()))
108 {
109 return convertor.fromJSON(object);
110 }
111 }
112 return map;
113 }
114 }