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1
54 package org.logicalcobwebs.cglib.proxy;
55
56 import org.logicalcobwebs.asm.Type;
57
58 class CallbackUtils {
59 private CallbackUtils() { }
60
61 static Class  determineType(Callback callback) {
62 Class test = typeHelper(callback, null, NoOp.class);
63 test = typeHelper(callback, test, MethodInterceptor.class);
64 test = typeHelper(callback, test, InvocationHandler.class);
65 test = typeHelper(callback, test, LazyLoader.class);
66 test = typeHelper(callback, test, Dispatcher.class);
67 test = typeHelper(callback, test, FixedValue.class);
68 if (test == null) {
69 throw new IllegalStateException ("Unknown callback " + callback.getClass());
70 }
71 return test;
72 }
73
74 private static Class typeHelper(Callback callback, Class cur, Class callbackType) {
75 if (callback == null) {
76 throw new IllegalStateException ("Callback is null");
77 }
78 if (callbackType.isAssignableFrom(callback.getClass())) {
79 if (cur != null) {
80 throw new IllegalStateException ("Callback implements both " + cur + " and " + callbackType + "; use setCallbackTypes to distinguish");
81 }
82 return callbackType;
83 } else {
84 return cur;
85 }
86 }
87
88 static CallbackGenerator getGenerator(Class type) {
89 if (type.equals(NoOp.class)) {
90 return NoOpGenerator.INSTANCE;
91 } else if (type.equals(MethodInterceptor.class)) {
92 return MethodInterceptorGenerator.INSTANCE;
93 } else if (type.equals(InvocationHandler.class)) {
94 return InvocationHandlerGenerator.INSTANCE;
95 } else if (type.equals(LazyLoader.class)) {
96 return LazyLoaderGenerator.INSTANCE;
97 } else if (type.equals(Dispatcher.class)) {
98 return DispatcherGenerator.INSTANCE;
99 } else if (type.equals(FixedValue.class)) {
100 return FixedValueGenerator.INSTANCE;
101 } else {
102 throw new IllegalStateException ("Unknown callback " + type);
103 }
104 }
105 }
106 |
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