1/*
2 * Copyright 2003 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.transform.impl;
17
18import org.mockito.asm.Attribute;
19import org.mockito.cglib.core.*;
20import org.mockito.cglib.transform.*;
21
22/**
23 * A {@link GeneratorStrategy} suitable for use with {@link org.mockito.cglib.Enhancer} which
24 * causes all undeclared exceptions thrown from within a proxied method to be wrapped
25 * in an alternative exception of your choice.
26 */
27public class UndeclaredThrowableStrategy extends DefaultGeneratorStrategy {
28    private ClassTransformer t;
29
30    /**
31     * Create a new instance of this strategy.
32     * @param wrapper a class which extends either directly or
33     * indirectly from <code>Throwable</code> and which has at least one
34     * constructor that takes a single argument of type
35     * <code>Throwable</code>, for example
36     * <code>java.lang.reflect.UndeclaredThrowableException.class</code>
37     */
38    public UndeclaredThrowableStrategy(Class wrapper) {
39        t = new UndeclaredThrowableTransformer(wrapper);
40        t = new MethodFilterTransformer(TRANSFORM_FILTER, t);
41    }
42
43    private static final MethodFilter TRANSFORM_FILTER = new MethodFilter() {
44        public boolean accept(int access, String name, String desc, String signature, String[] exceptions) {
45            return !TypeUtils.isPrivate(access) && name.indexOf('$') < 0;
46        }
47    };
48
49    protected ClassGenerator transform(ClassGenerator cg) throws Exception {
50        return new TransformingClassGenerator(cg, t);
51    }
52}
53
54