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1
22 package org.jboss.annotation.factory;
23
24 import java.lang.reflect.InvocationHandler  ;
25 import java.lang.reflect.Method ;
26 import java.lang.reflect.Proxy ;
27 import java.util.Map ;
28
29
36 public class AnnotationProxy implements InvocationHandler
37 {
38 Map map;
39 Class annotationType;
40
41 public AnnotationProxy(Class annotationType, Map valueMap)
42 {
43 this.annotationType = annotationType;
44 map = valueMap;
45 }
46
47 public Object invoke(Object proxy, Method method, Object [] args)
48 throws Throwable
49 {
50 if (method.getName().equals("equals"))
51 {
52 return doEquals(proxy, args[0]);
53 }
54 else if (method.getName().equals("hashCode"))
55 {
56 return doHashCode();
57 }
58 else if (method.getName().equals("toString"))
59 {
60 return map.toString();
61 }
62 else if (method.getName().equals("annotationType"))
63 {
64 return annotationType;
65 }
66
67
75 return map.get(method.getName());
76 }
77
78 public Object getValue(String name)
79 {
80 return map.get(name);
81 }
82
83 @SuppressWarnings ("unchecked")
84 private Object doEquals(Object proxy, Object obj)
85 {
86 if (obj == proxy) return Boolean.TRUE;
87 if (obj == null) return Boolean.FALSE;
88
89 Class [] intfs = proxy.getClass().getInterfaces();
90 if (!intfs[0].isAssignableFrom(obj.getClass()))
91 {
92 return Boolean.FALSE;
93 }
94 try
95 {
96 Proxy.getInvocationHandler(obj);
97 }
98 catch (Exception ex)
99 {
100 return Boolean.FALSE;
101 }
102 return Boolean.TRUE;
103 }
104
105 private Object doHashCode()
106 {
107 return new Integer (map.hashCode());
108 }
109
110 public static Object createProxy(Map map, Class annotation) throws Exception
111 {
112 AnnotationProxy proxyHandler = new AnnotationProxy(annotation, map);
113 return java.lang.reflect.Proxy.newProxyInstance(annotation.getClassLoader(), new Class []{annotation}, proxyHandler);
114 }
115 }
116 |
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