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1 package org.logicalcobwebs.cglib.proxy;
2
3 import org.logicalcobwebs.cglib.core.*;
4 import java.lang.reflect.Method  ;
5 import java.util.*;
6 import org.logicalcobwebs.asm.Type;
7
8 class InvocationHandlerGenerator
9 implements CallbackGenerator
10 {
11 public static final InvocationHandlerGenerator INSTANCE = new InvocationHandlerGenerator();
12
13 private static final Type INVOCATION_HANDLER =
14 TypeUtils.parseType("org.logicalcobwebs.cglib.proxy.InvocationHandler");
15 private static final Type UNDECLARED_THROWABLE_EXCEPTION =
16 TypeUtils.parseType("org.logicalcobwebs.cglib.proxy.UndeclaredThrowableException");
17 private static final Type METHOD =
18 TypeUtils.parseType("java.lang.reflect.Method");
19 private static final Signature INVOKE =
20 TypeUtils.parseSignature("Object invoke(Object, java.lang.reflect.Method, Object[])");
21 private static final Signature CSTRUCT_THROWABLE =
22 TypeUtils.parseConstructor("Throwable");
23
24 private String getFieldName(Context context, Method method) {
25 return "CGLIB$$METHOD_" + context.getUniqueName(method);
26 }
27
28 public void generate(ClassEmitter ce, final Context context) {
29 for (Iterator it = context.getMethods(); it.hasNext();) {
30 Method method = (Method )it.next();
31
32 String fieldName = getFieldName(context, method);
33 ce.declare_field(Constants.PRIVATE_FINAL_STATIC, fieldName, METHOD, null, null);
34
35 CodeEmitter e = ce.begin_method(context.getModifiers(method),
36 ReflectUtils.getSignature(method),
37 ReflectUtils.getExceptionTypes(method),
38 null);
39 Block handler = e.begin_block();
40 context.emitCallback(e, context.getIndex(method));
41 e.load_this();
42 e.getfield(fieldName);
43 e.create_arg_array();
44 e.invoke_interface(INVOCATION_HANDLER, INVOKE);
45 e.unbox(Type.getType(method.getReturnType()));
46 e.return_value();
47 handler.end();
48
49
60 Class [] exceptionTypes = method.getExceptionTypes();
61 Set exceptionSet = new HashSet(Arrays.asList(exceptionTypes));
62 if (!(exceptionSet.contains(Exception .class) ||
63 exceptionSet.contains(Throwable .class))) {
64 if (!exceptionSet.contains(RuntimeException .class)) {
65 e.catch_exception(handler, Constants.TYPE_RUNTIME_EXCEPTION);
66 e.athrow();
67 }
68 if (!exceptionSet.contains(Error .class)) {
69 e.catch_exception(handler, Constants.TYPE_ERROR);
70 e.athrow();
71 }
72 for (int i = 0; i < exceptionTypes.length; i++) {
73 e.catch_exception(handler, Type.getType(exceptionTypes[i]));
74 e.athrow();
75 }
76 e.catch_exception(handler, Constants.TYPE_THROWABLE);
78 e.new_instance(UNDECLARED_THROWABLE_EXCEPTION);
79 e.dup_x1();
80 e.swap();
81 e.invoke_constructor(UNDECLARED_THROWABLE_EXCEPTION, CSTRUCT_THROWABLE);
82 e.athrow();
83 }
84 e.end_method();
85 }
86 }
87
88 public void generateStatic(CodeEmitter e, final Context context) {
89 for (Iterator it = context.getMethods(); it.hasNext();) {
90 Method method = (Method )it.next();
91 EmitUtils.load_method(e, method);
92 e.putfield(getFieldName(context, method));
93 }
94 }
95 }
96 |
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