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45 package org.openejb.util.proxy;
46
47 import java.lang.reflect.Constructor  ;
48 import java.lang.reflect.InvocationTargetException ;
49 import java.lang.reflect.Proxy ;
50 import java.util.Properties ;
51
52 import org.openejb.OpenEJBException;
53
54
62 public class Jdk13ProxyFactory implements ProxyFactory {
63 public void init(Properties props) throws OpenEJBException {
64 String version = "";
65 String badVersion = "1.3.0-";
66 try{
67 version = System.getProperty("java.vm.version");
68 } catch(Exception e){
69 }
70 if (version.indexOf(badVersion) != -1) {
71 String message = ""+
72 "INCOMPATIBLE VM: \n\n"+
73 "The Java Virtual Machine you are using contains a bug\n"+
74 "in the proxy generation logic. This bug has been \n"+
75 "documented by Sun and has been fixed in later VMs. \n"+
76 "Please download the latest 1.3 Virtual Machine. \n"+
77 "For more details see: \n"+
78 "http://developer.java.sun.com/developer/bugParade/bugs/4346224.html\n ";
79 throw new OpenEJBException(message);
80 }
81 }
82
83
86 public org.openejb.util.proxy.InvocationHandler getInvocationHandler(Object proxy) throws IllegalArgumentException {
87 Jdk13InvocationHandler handler = (Jdk13InvocationHandler)Proxy.getInvocationHandler(proxy);
88 if(handler == null)
89 return null;
90 return handler.getInvocationHandler();
91 }
92
93
96 public Object setInvocationHandler(Object proxy, org.openejb.util.proxy.InvocationHandler handler) throws IllegalArgumentException {
97 Jdk13InvocationHandler jdk13 = (Jdk13InvocationHandler)Proxy.getInvocationHandler(proxy);
98 if(jdk13 == null)
99 throw new IllegalArgumentException ("Proxy "+proxy+" unknown!");
100 return jdk13.setInvocationHandler(handler);
101 }
102
103
106 public Class getProxyClass(Class interfce) throws IllegalArgumentException {
107 return Proxy.getProxyClass(interfce.getClassLoader(), new Class []{interfce});
108 }
109
112 public Class getProxyClass(Class [] interfaces) throws IllegalArgumentException {
113 if(interfaces.length < 1) {
114 throw new IllegalArgumentException ("It's boring to implement 0 interfaces!");
115 }
116 return Proxy.getProxyClass(interfaces[0].getClassLoader(), interfaces);
117 }
118
119
120
123 public boolean isProxyClass(Class cl) {
124 return Proxy.isProxyClass(cl);
125 }
126
127 private final static Class [] constructorParams = { java.lang.reflect.InvocationHandler .class };
128
129 public Object newProxyInstance(Class proxyClass) throws IllegalArgumentException {
130 if(!Proxy.isProxyClass(proxyClass))
131 throw new IllegalArgumentException ();
132 try {
133 Constructor cons = proxyClass.getConstructor(constructorParams);
134 return (Object ) cons.newInstance(new Object [] { new Jdk13InvocationHandler() });
135 } catch (NoSuchMethodException e) {
136 throw new InternalError (e.toString());
137 } catch (IllegalAccessException e) {
138 throw new InternalError (e.toString());
139 } catch (InstantiationException e) {
140 throw new InternalError (e.toString());
141 } catch (InvocationTargetException e) {
142 throw new InternalError (e.toString());
143 }
144 }
145
146
150 public Object newProxyInstance(Class interfce, org.openejb.util.proxy.InvocationHandler h) throws IllegalArgumentException {
151 Jdk13InvocationHandler handler = new Jdk13InvocationHandler(h);
152 return Proxy.newProxyInstance(interfce.getClassLoader(), new Class []{interfce}, handler);
153 }
154
155
159 public Object newProxyInstance(Class [] interfaces, org.openejb.util.proxy.InvocationHandler h) throws IllegalArgumentException {
160 if(interfaces.length < 1) {
161 throw new IllegalArgumentException ("It's boring to implement 0 interfaces!");
162 }
163 Jdk13InvocationHandler handler = new Jdk13InvocationHandler(h);
164 return Proxy.newProxyInstance(interfaces[0].getClassLoader(), interfaces, handler);
165 }
166 }
167
168 |
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