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1
22 package org.jboss.mx.mxbean;
23
24 import java.lang.reflect.InvocationHandler  ;
25 import java.lang.reflect.Method ;
26 import java.lang.reflect.Proxy ;
27 import java.lang.reflect.Type ;
28
29 import javax.management.openmbean.CompositeData ;
30 import javax.management.openmbean.InvalidKeyException ;
31
32 import org.jboss.util.UnreachableStatementException;
33
34
40 public class CompositeDataInvocationHandler implements InvocationHandler
41 {
42
43 private CompositeData compositeData;
44
45
50 public CompositeDataInvocationHandler(CompositeData compositeData)
51 {
52 if (compositeData == null)
53 throw new IllegalArgumentException ("Null compositeData");
54 this.compositeData = compositeData;
55 }
56
57
62 public CompositeData getCompositeData()
63 {
64 return compositeData;
65 }
66
67 public Object invoke(Object proxy, Method method, Object [] args) throws Throwable
68 {
69 if (Object .class.equals(method.getDeclaringClass()))
70 return handleObjectInvocation(method.getName(), args);
71
72 Object value = getValue(method);
73
74 Type returnType = method.getGenericReturnType();
75 return MXBeanUtils.reconstruct(returnType, value, method);
76 }
77
78 private Object getValue(Method method)
79 {
80 String key = MXBeanUtils.getCompositeDataKey(method);
81 if (key == null)
82 throw new IllegalArgumentException ("Unsupported method '" + method + "'; it must be a property getter.");
83 try
84 {
85 return compositeData.get(key);
86 }
87 catch (InvalidKeyException e)
88 {
89 throw new IllegalArgumentException ("Unsupported method '" + method + "'; it must be a property getter for one of the item names of the composite data: " + compositeData, e);
90 }
91 }
92
93 private Object handleObjectInvocation(String name, Object [] args) throws Throwable
94 {
95 if ("equals".equals(name))
96 {
97 Object object = args[0];
98 if (object == null || object instanceof Proxy == false)
99 return false;
100 InvocationHandler handler = Proxy.getInvocationHandler(object);
101 if (handler == this)
102 return true;
103 if (handler == null || handler instanceof CompositeDataInvocationHandler == false)
104 return false;
105
106 CompositeDataInvocationHandler other = (CompositeDataInvocationHandler) handler;
107 return getCompositeData().equals(other.getCompositeData());
108 }
109 else if ("hashCode".equals(name))
110 return getCompositeData().hashCode();
111 else if ("toString".equals(name))
112 return getCompositeData().toString();
113 throw new UnreachableStatementException();
114 }
115 }
116 |
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