InvocationHandlerGenerator.java revision 674060f01e9090cd21b3c5656cc3204912ad17a6 
1/*
2 * Copyright 2003,2004 The Apache Software Foundation
3 *
4 *  Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 *  Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package org.mockito.cglib.proxy;
17
18import java.util.*;
19
20import org.mockito.asm.Type;
21import org.mockito.cglib.core.*;
22
23class InvocationHandlerGenerator
24implements CallbackGenerator
25{
26    public static final InvocationHandlerGenerator INSTANCE = new InvocationHandlerGenerator();
27
28    private static final Type INVOCATION_HANDLER =
29      TypeUtils.parseType("org.mockito.cglib.proxy.InvocationHandler");
30    private static final Type UNDECLARED_THROWABLE_EXCEPTION =
31      TypeUtils.parseType("org.mockito.cglib.proxy.UndeclaredThrowableException");
32    private static final Type METHOD =
33      TypeUtils.parseType("java.lang.reflect.Method");
34    private static final Signature INVOKE =
35      TypeUtils.parseSignature("Object invoke(Object, java.lang.reflect.Method, Object[])");
36
37    public void generate(ClassEmitter ce, Context context, List methods) {
38        for (Iterator it = methods.iterator(); it.hasNext();) {
39            MethodInfo method = (MethodInfo)it.next();
40            Signature impl = context.getImplSignature(method);
41            ce.declare_field(Constants.PRIVATE_FINAL_STATIC, impl.getName(), METHOD, null);
42
43            CodeEmitter e = context.beginMethod(ce, method);
44            Block handler = e.begin_block();
45            context.emitCallback(e, context.getIndex(method));
46            e.load_this();
47            e.getfield(impl.getName());
48            e.create_arg_array();
49            e.invoke_interface(INVOCATION_HANDLER, INVOKE);
50            e.unbox(method.getSignature().getReturnType());
51            e.return_value();
52            handler.end();
53            EmitUtils.wrap_undeclared_throwable(e, handler, method.getExceptionTypes(), UNDECLARED_THROWABLE_EXCEPTION);
54            e.end_method();
55        }
56    }
57
58    public void generateStatic(CodeEmitter e, Context context, List methods) {
59        for (Iterator it = methods.iterator(); it.hasNext();) {
60            MethodInfo method = (MethodInfo)it.next();
61            EmitUtils.load_method(e, method);
62            e.putfield(context.getImplSignature(method).getName());
63        }
64    }
65}
66