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 */ 21package proguard.classfile.visitor; 22 23import proguard.classfile.Clazz; 24import proguard.classfile.constant.*; 25import proguard.classfile.constant.visitor.ConstantVisitor; 26import proguard.classfile.util.*; 27 28/** 29 * This ConstantVisitor lets a given ClassVisitor visit all the referenced 30 * classes that are returned by the invoke dynamic constants that it visits. 31 * 32 * @author Eric Lafortune 33 */ 34public class DynamicReturnedClassVisitor 35extends SimplifiedVisitor 36implements ConstantVisitor 37{ 38 protected final ClassVisitor classVisitor; 39 40 41 public DynamicReturnedClassVisitor(ClassVisitor classVisitor) 42 { 43 this.classVisitor = classVisitor; 44 } 45 46 47 // Implementations for ConstantVisitor. 48 49 public void visitAnyConstant(Clazz clazz, Constant constant) {} 50 51 52 public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant) 53 { 54 // Is the method returning a class type? 55 Clazz[] referencedClasses = invokeDynamicConstant.referencedClasses; 56 if (referencedClasses != null && 57 referencedClasses.length > 0 && 58 ClassUtil.isInternalClassType(ClassUtil.internalMethodReturnType(invokeDynamicConstant.getType(clazz)))) 59 { 60 // Let the visitor visit the return type class, if any. 61 Clazz referencedClass = referencedClasses[referencedClasses.length - 1]; 62 if (referencedClass != null) 63 { 64 referencedClass.accept(classVisitor); 65 } 66 } 67 } 68} 69