1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21package proguard.classfile.visitor;
22
23import proguard.classfile.*;
24import proguard.classfile.constant.visitor.ConstantVisitor;
25import proguard.classfile.attribute.*;
26import proguard.classfile.attribute.visitor.ExceptionInfoVisitor;
27
28/**
29 * This <code>ExceptionInfoVisitor</code> lets a given
30 * <code>ConstantVisitor</code> visit all catch class constants of exceptions
31 * that it visits.
32 *
33 * @author Eric Lafortune
34 */
35public class ExceptionHandlerConstantVisitor
36implements   ExceptionInfoVisitor
37{
38    private final ConstantVisitor constantVisitor;
39
40
41    /**
42     * Creates a new ExceptionHandlerConstantVisitor.
43     * @param constantVisitor the ConstantVisitor that will visit the catch
44     *                        class constants.
45     */
46    public ExceptionHandlerConstantVisitor(ConstantVisitor constantVisitor)
47    {
48        this.constantVisitor = constantVisitor;
49    }
50
51
52    // Implementations for ExceptionInfoVisitor.
53
54    public void visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo)
55    {
56        int catchType = exceptionInfo.u2catchType;
57        if (catchType != 0)
58        {
59            clazz.constantPoolEntryAccept(catchType, constantVisitor);
60        }
61    }
62}