|
1
22 package org.jboss.mx.interceptor;
23
24 import java.lang.reflect.Method  ;
25
26 import javax.management.Descriptor ;
27 import javax.management.InvalidAttributeValueException ;
28 import javax.management.MBeanException ;
29 import javax.management.ServiceNotFoundException ;
30 import javax.management.modelmbean.InvalidTargetObjectTypeException ;
31
32 import org.jboss.mx.modelmbean.ModelMBeanConstants;
33 import org.jboss.mx.server.Invocation;
34 import org.jboss.mx.server.MBeanInvoker;
35
36
42 public class AttributeDispatcher
43 extends ReflectedDispatcher
44 {
45 private Method getter;
46 private Method setter;
47
48 public AttributeDispatcher(Method getter, Method setter, boolean dynamic)
49 {
50 super(dynamic);
51 setName("Attribute Dispatcher");
52 this.getter = getter;
53 this.setter = setter;
54 }
55
56
62 public Object invoke(Invocation invocation) throws Throwable
63 {
64 Object target = invocation.getTarget();
65
66 Object value = null;
67 Object [] args = invocation.getArgs();
68 if( args == null )
70 {
71 Method getMethod = getter;
72 if (dynamic)
73 {
74 Descriptor d = invocation.getDescriptor();
75 if (d != null)
76 {
77 Object descriptorTarget = d.getFieldValue(ModelMBeanConstants.TARGET_OBJECT);
78 if (descriptorTarget != null)
79 {
80 String targetType = (String ) d.getFieldValue(ModelMBeanConstants.TARGET_TYPE);
81 if (ModelMBeanConstants.OBJECT_REF.equalsIgnoreCase(targetType) == false)
82 throw new InvalidTargetObjectTypeException ("Target type is " + targetType);
83 target = descriptorTarget;
84 }
85 String getMethodString = (String ) d.getFieldValue(ModelMBeanConstants.GET_METHOD);
86 if (getMethodString != null && (getMethod == null || getMethodString.equals(getMethod.getName()) == false))
87 {
88 MBeanInvoker invoker = invocation.getInvoker();
89 Object object = invoker.invoke(getMethodString, new Object [0], new String [0]);
90 checkAssignable(getMethodString, invocation.getAttributeTypeClass(), object);
91 return object;
92 }
93 }
94 }
95 if (target == null)
96 throw new MBeanException (new ServiceNotFoundException ("No Target"));
97 try
98 {
99 value = getMethod.invoke(target, args);
100 }
101 catch (Throwable t)
102 {
103 handleInvocationExceptions(t);
104 return null;
105 }
106 }
107 else
109 {
110 Method setMethod = setter;
111 if (dynamic)
112 {
113 Descriptor d = invocation.getDescriptor();
114 if (d != null)
115 {
116 Object descriptorTarget = d.getFieldValue(ModelMBeanConstants.TARGET_OBJECT);
117 if (descriptorTarget != null)
118 {
119 String targetType = (String ) d.getFieldValue(ModelMBeanConstants.TARGET_TYPE);
120 if (ModelMBeanConstants.OBJECT_REF.equalsIgnoreCase(targetType) == false)
121 throw new InvalidTargetObjectTypeException ("Target type is " + targetType);
122 target = descriptorTarget;
123 }
124 String setMethodString = (String ) d.getFieldValue(ModelMBeanConstants.SET_METHOD);
125 if (setMethodString != null && (setMethod == null || setMethodString.equals(setMethod.getName()) == false))
126 {
127 MBeanInvoker invoker = invocation.getInvoker();
128 return invoker.invoke(setMethodString, new Object [] { args[0] }, new String [] { invocation.getAttributeType() });
129 }
130 }
131 }
132 if (target == null)
133 throw new MBeanException (new ServiceNotFoundException ("No Target"));
134 try
135 {
136 value = setMethod.invoke(target, args);
137 }
138 catch (Throwable t)
139 {
140 handleInvocationExceptions(t);
141 return null;
142 }
143 }
144 return value;
145 }
146
147 protected void checkAssignable(String context, Class clazz, Object value) throws InvalidAttributeValueException , ClassNotFoundException
148 {
149 if (value != null && clazz.isAssignableFrom(value.getClass()) == false)
150 throw new InvalidAttributeValueException (context + " has class " + value.getClass() + " loaded from " + value.getClass().getClassLoader() +
151 " that is not assignable to attribute class " + clazz + " loaded from " + clazz.getClassLoader());
152 }
153 }
154 |
Popular Tags |
Java API By Example, From Geeks To Geeks.