|
1
7 package org.jboss.ejb3.callback;
8
9 import javax.ejb.CallbackListener;
10
11 import org.jboss.aop.Advisor;
12
13 import java.lang.reflect.Method  ;
14
15
19 public class CallbackResolver
20 {
21 public static Callback resolveCallback(Class beanClass, Class annotation, Class listener) throws Exception
22 {
23 Callback callback = null;
24 Method [] methods = beanClass.getDeclaredMethods();
25
26 for (int i = 0 ; i < methods.length ; i++)
27 {
28 if (methods[i].getAnnotation(annotation) != null)
29 {
30 if (callback == null)
31 {
32 callback = new BeanCallback(methods[i]);
33 Class returnType = methods[i].getReturnType();
34 Class [] args = methods[i].getParameterTypes();
35 if (returnType != Void.TYPE && args.length != 0)
36 {
37 throw new RuntimeException ("Callback methods annotated on the bean class must return void and take no arguments: " + annotation.getName() + " - " + methods[i]);
38 }
39 }
40 else
41 {
42 throw new RuntimeException ("You can only annotate one callback method with "
43 + annotation.getName() + " in bean class: " + beanClass.getName());
44 }
45 }
46 }
47
48 if (listener != null)
49 {
50 try
51 {
52 methods = listener.getDeclaredMethods();
53 for (int i = 0 ; i < methods.length ; i++)
54 {
55 if (methods[i].getAnnotation(annotation) != null)
56 {
57 if (callback == null)
58 {
59 callback = new ListenerCallback(methods[i], listener.newInstance());
60 Class returnType = methods[i].getReturnType();
61 Class [] args = methods[i].getParameterTypes();
62 if (returnType != Void.TYPE && args.length != 0)
63 {
64 throw new RuntimeException ("Callback methods annotated in a listener bean class must return void and take one argument: " + annotation.getName() + " - " + methods[i]);
65 }
66 }
67 else
68 {
69 throw new RuntimeException ("You can only annotate one callback method with "
70 + annotation.getName() + " in bean class: " + beanClass.getName() + " and callback listener: "
71 + listener.getName());
72 }
73 }
74 }
75 }
76 catch(Exception e)
77 {
78 throw new RuntimeException (e.getCause());
79 }
80 }
81
82 return callback;
83 }
84
85 public static Callback resolveCallback(Advisor beanAdvisor, Class beanClass, Class annotation, Class listener) throws Exception
86 {
87 Callback callback = null;
88 Method [] methods = beanClass.getDeclaredMethods();
89
90 for (int i = 0 ; i < methods.length ; i++)
91 {
92 if ( (methods[i].getAnnotation(annotation) != null) || (beanAdvisor.resolveAnnotation(methods[i], annotation) != null))
93 {
94 if (callback == null)
95 {
96 callback = new BeanCallback(methods[i]);
97 Class returnType = methods[i].getReturnType();
98 Class [] args = methods[i].getParameterTypes();
99 if (returnType != Void.TYPE && args.length != 0)
100 {
101 throw new RuntimeException ("Callback methods annotated on the bean class must return void and take no arguments: " + annotation.getName() + " - " + methods[i]);
102 }
103 }
104 else
105 {
106 throw new RuntimeException ("You can only annotate one callback method with "
107 + annotation.getName() + " in bean class: " + beanClass.getName());
108 }
109 }
110 }
111
112 if (listener != null)
113 {
114 try
115 {
116 methods = listener.getDeclaredMethods();
117 for (int i = 0 ; i < methods.length ; i++)
118 {
119 if (methods[i].getAnnotation(annotation) != null)
120 {
121 if (callback == null)
122 {
123 callback = new ListenerCallback(methods[i], listener.newInstance());
124 Class returnType = methods[i].getReturnType();
125 Class [] args = methods[i].getParameterTypes();
126 if (returnType != Void.TYPE && args.length != 0)
127 {
128 throw new RuntimeException ("Callback methods annotated in a listener bean class must return void and take one argument: " + annotation.getName() + " - " + methods[i]);
129 }
130 }
131 else
132 {
133 throw new RuntimeException ("You can only annotate one callback method with "
134 + annotation.getName() + " in bean class: " + beanClass.getName() + " and callback listener: "
135 + listener.getName());
136 }
137 }
138 }
139 }
140 catch(Exception e)
141 {
142 throw new RuntimeException (e.getCause());
143 }
144 }
145
146 return callback;
147 }
148 }
149 |
Popular Tags |
Java API By Example, From Geeks To Geeks.