1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2009 Eric Lafortune (eric (at) 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.editor; 22 23 import proguard.classfile.*; 24 import proguard.classfile.attribute.*; 25 import proguard.classfile.attribute.visitor.ExceptionInfoVisitor; 26 27 /** 28 * This ExceptionInfoVisitor adds all exception information that it visits to 29 * the given target code attribute. 30 * 31 * @author Eric Lafortune 32 */ 33 public class ExceptionInfoAdder 34 implements ExceptionInfoVisitor 35 { 36 private final ConstantAdder constantAdder; 37 private final CodeAttributeComposer codeAttributeComposer; 38 39 40 /** 41 * Creates a new ExceptionAdder that will copy exceptions into the given 42 * target code attribute. 43 */ 44 public ExceptionInfoAdder(ProgramClass targetClass, 45 CodeAttributeComposer targetComposer) 46 { 47 constantAdder = new ConstantAdder(targetClass); 48 codeAttributeComposer = targetComposer; 49 } 50 51 52 // Implementations for ExceptionInfoVisitor. 53 54 public void visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo) 55 { 56 // Create a copy of the exception info. 57 ExceptionInfo newExceptionInfo = 58 new ExceptionInfo(exceptionInfo.u2startPC, 59 exceptionInfo.u2endPC, 60 exceptionInfo.u2handlerPC, 61 exceptionInfo.u2catchType == 0 ? 0 : 62 constantAdder.addConstant(clazz, exceptionInfo.u2catchType)); 63 64 // Add the completed exception info. 65 codeAttributeComposer.appendException(newExceptionInfo); 66 } 67 }