1 /***************************************************************************************
2 * Copyright (c) Jonas BonŽr, Alexandre Vasseur. All rights reserved. *
3 * http://aspectwerkz.codehaus.org *
4 * ---------------------------------------------------------------------------------- *
5 * The software in this package is published under the terms of the LGPL license *
6 * a copy of which has been included with this distribution in the license.txt file. *
7 **************************************************************************************/
8 package org.codehaus.aspectwerkz.joinpoint.impl;
9
10 import org.codehaus.aspectwerkz.joinpoint.MethodRtti;
11 import org.codehaus.aspectwerkz.joinpoint.Rtti;
12
13 import java.lang.ref.WeakReference;
14 import java.lang.reflect.Method;
15
16 /***
17 * Implementation for the method signature.
18 *
19 * @author <a href="mailto:jboner@codehaus.org">Jonas BonŽr </a>
20 */
21 public class MethodRttiImpl implements MethodRtti {
22 private static final Object[] EMPTY_OBJECT_ARRAY = new Object[]{};
23
24 private final MethodSignatureImpl m_signature;
25
26 private WeakReference m_thisRef;
27
28 private WeakReference m_targetRef;
29
30 private Object[] m_parameterValues = EMPTY_OBJECT_ARRAY;
31
32 private Object m_returnValue;
33
34 /***
35 * Creates a new method RTTI.
36 *
37 * @param signature
38 * @param thisInstance
39 * @param targetInstance
40 */
41 public MethodRttiImpl(final MethodSignatureImpl signature, final Object thisInstance, final Object targetInstance) {
42 m_signature = signature;
43 m_thisRef = new WeakReference(thisInstance);
44 m_targetRef = new WeakReference(targetInstance);
45 }
46
47 /***
48 * Clones the RTTI instance.
49 *
50 * @param thisInstance
51 * @param targetInstance
52 * @return
53 */
54 public Rtti cloneFor(final Object thisInstance, final Object targetInstance) {
55 return new MethodRttiImpl(m_signature, thisInstance, targetInstance);
56 }
57
58 /***
59 * Returns the target instance.
60 *
61 * @return the target instance
62 */
63 public Object getTarget() {
64 return m_targetRef.get();
65 }
66
67 /***
68 * Returns the instance currently executing.
69 *
70 * @return the instance currently executing
71 */
72 public Object getThis() {
73 return m_thisRef.get();
74 }
75
76 /***
77 * Returns the method.
78 *
79 * @return the method
80 */
81 public Method getMethod() {
82 return m_signature.getMethod();
83 }
84
85 /***
86 * Returns the declaring class.
87 *
88 * @return the declaring class
89 */
90 public Class getDeclaringType() {
91 return m_signature.getDeclaringType();
92 }
93
94 /***
95 * Returns the modifiers for the signature. <p/>Could be used like this:
96 * <p/>
97 * <pre>
98 * boolean isPublic = java.lang.reflect.Modifier.isPublic(signature.getModifiers());
99 * </pre>
100 *
101 * @return the mofifiers
102 */
103 public int getModifiers() {
104 return m_signature.getModifiers();
105 }
106
107 /***
108 * Returns the name (f.e. name of method of field).
109 *
110 * @return
111 */
112 public String getName() {
113 return m_signature.getName();
114 }
115
116 /***
117 * Returns the exception types declared by the code block.
118 *
119 * @return the exception types
120 */
121 public Class[] getExceptionTypes() {
122 return m_signature.getExceptionTypes();
123 }
124
125 /***
126 * Returns the parameter types.
127 *
128 * @return the parameter types
129 */
130 public Class[] getParameterTypes() {
131 return m_signature.getParameterTypes();
132 }
133
134 /***
135 * Sets the values of the parameters.
136 *
137 * @param parameterValues
138 */
139 public void setParameterValues(final Object[] parameterValues) {
140 m_parameterValues = parameterValues;
141 }
142
143 /***
144 * Returns the values of the parameters.
145 *
146 * @return the values of the parameters
147 */
148 public Object[] getParameterValues() {
149 return m_parameterValues;
150 }
151
152 /***
153 * Returns the return type.
154 *
155 * @return the return type
156 */
157 public Class getReturnType() {
158 return m_signature.getReturnType();
159 }
160
161 /***
162 * Sets the return value.
163 *
164 * @param returnValue the return value
165 */
166 public void setReturnValue(final Object returnValue) {
167 m_returnValue = returnValue;
168 }
169
170 /***
171 * Returns the value of the return type.
172 *
173 * @return the value of the return type
174 */
175 public Object getReturnValue() {
176 return m_returnValue;
177 }
178
179 /***
180 * Returns a string representation of the signature.
181 *
182 * @return a string representation
183 * @TODO: implement toString to something meaningful
184 */
185 public String toString() {
186 return super.toString();
187 }
188 }