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1
54 package org.logicalcobwebs.cglib.proxy;
55
56 import java.io.Serializable  ;
57 import java.lang.reflect.Method ;
58 import java.lang.reflect.Member ;
59 import org.logicalcobwebs.cglib.core.CodeGenerationException;
60
61
76 public class Proxy implements Serializable {
77 protected InvocationHandler h;
78
79 private static final CallbackFilter BAD_OBJECT_METHOD_FILTER = new CallbackFilter() {
80 public int accept(Method method) {
81 if (method.getDeclaringClass().getName().equals("java.lang.Object")) {
82 String name = method.getName();
83 if (!(name.equals("hashCode") ||
84 name.equals("equals") ||
85 name.equals("toString"))) {
86 return 1;
87 }
88 }
89 return 0;
90 }
91 };
92
93 protected Proxy(InvocationHandler h) {
94 EnhancerEmitter.setThreadCallbacks(getClass(), new Callback[]{ h, null });
95 this.h = h;
96 }
97
98 private static class ProxyImpl extends Proxy {
100 protected ProxyImpl(InvocationHandler h) {
101 super(h);
102 }
103 }
104
105 public static InvocationHandler getInvocationHandler(Object proxy) {
106 if (!(proxy instanceof ProxyImpl)) {
107 throw new IllegalArgumentException ("Object is not a proxy");
108 }
109 return ((Proxy)proxy).h;
110 }
111
112 public static Class getProxyClass(ClassLoader loader, Class [] interfaces) {
113 Enhancer e = new Enhancer();
114 e.setSuperclass(ProxyImpl.class);
115 e.setInterfaces(interfaces);
116 e.setCallbackTypes(new Class []{
117 InvocationHandler.class,
118 NoOp.class,
119 });
120 e.setCallbackFilter(BAD_OBJECT_METHOD_FILTER);
121 e.setUseFactory(false);
122 return e.createClass();
123 }
124
125 public static boolean isProxyClass(Class cl) {
126 return cl.getSuperclass().equals(ProxyImpl.class);
127 }
128
129 public static Object newProxyInstance(ClassLoader loader, Class [] interfaces, InvocationHandler h) {
130 try {
131 Class clazz = getProxyClass(loader, interfaces);
132 return clazz.getConstructor(new Class []{ InvocationHandler.class }).newInstance(new Object []{ h });
133 } catch (RuntimeException e) {
134 throw e;
135 } catch (Exception e) {
136 throw new CodeGenerationException(e);
137 }
138 }
139 }
140 |
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