1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 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 */ 21 package proguard.classfile.visitor; 22 23 import proguard.classfile.*; 24 import proguard.classfile.attribute.*; 25 import proguard.classfile.attribute.visitor.ExceptionInfoVisitor; 26 import proguard.classfile.constant.visitor.ConstantVisitor; 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 */ 35 public class ExceptionHandlerConstantVisitor 36 implements 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 */ ExceptionHandlerConstantVisitor(ConstantVisitor constantVisitor)46 public ExceptionHandlerConstantVisitor(ConstantVisitor constantVisitor) 47 { 48 this.constantVisitor = constantVisitor; 49 } 50 51 52 // Implementations for ExceptionInfoVisitor. 53 visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo)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 }