1b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/* 2b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ProGuard -- shrinking, optimization, obfuscation, and preverification 3b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * of Java bytecode. 4b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 5b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu) 6b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 7b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is free software; you can redistribute it and/or modify it 8b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * under the terms of the GNU General Public License as published by the Free 9b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Software Foundation; either version 2 of the License, or (at your option) 10b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * any later version. 11b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 12b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is distributed in the hope that it will be useful, but WITHOUT 13b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * more details. 16b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 17b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * You should have received a copy of the GNU General Public License along 18b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * with this program; if not, write to the Free Software Foundation, Inc., 19b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 21b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopackage proguard.classfile.visitor; 22b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 23b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.*; 24b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.util.SimplifiedVisitor; 25b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 26b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/** 27b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This <code>MemberVisitor</code> lets a given <code>MemberVisitor</code> 28b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * travel to all concrete and abstract implementations of the visited methods 29b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * in their class hierarchies. 30b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 31b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @author Eric Lafortune 32b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 33b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopublic class MethodImplementationTraveler 34b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoextends SimplifiedVisitor 35b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimplements MemberVisitor 36b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato{ 37b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private final boolean visitThisMethod; 38b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private final boolean visitSuperMethods; 39b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private final boolean visitInterfaceMethods; 40b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private final boolean visitOverridingMethods; 41b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private final MemberVisitor memberVisitor; 42b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 43b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 44b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 45b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Creates a new MethodImplementationTraveler. 46b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param visitThisMethod specifies whether to visit the originally 47b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * visited methods. 48b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param visitSuperMethods specifies whether to visit the method in 49b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * the super classes. 50b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param visitInterfaceMethods specifies whether to visit the method in 51b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * the interface classes. 52b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param visitOverridingMethods specifies whether to visit the method in 53b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * the subclasses. 54b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param memberVisitor the <code>MemberVisitor</code> to which 55b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * visits will be delegated. 56b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 57b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public MethodImplementationTraveler(boolean visitThisMethod, 58b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato boolean visitSuperMethods, 59b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato boolean visitInterfaceMethods, 60b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato boolean visitOverridingMethods, 61b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MemberVisitor memberVisitor) 62b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 63b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato this.visitThisMethod = visitThisMethod; 64b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato this.visitSuperMethods = visitSuperMethods; 65b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato this.visitInterfaceMethods = visitInterfaceMethods; 66b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato this.visitOverridingMethods = visitOverridingMethods; 67b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato this.memberVisitor = memberVisitor; 68b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 69b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 70b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 71b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for MemberVisitor. 72b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 73b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) 74b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 75b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (visitThisMethod) 76b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 77b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato programMethod.accept(programClass, memberVisitor); 78b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 79b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 80b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (!isSpecial(programClass, programMethod)) 81b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 82b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato programClass.hierarchyAccept(false, 83b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato visitSuperMethods, 84b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato visitInterfaceMethods, 85b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato visitOverridingMethods, 86b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new NamedMethodVisitor(programMethod.getName(programClass), 87b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato programMethod.getDescriptor(programClass), 88b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new MemberAccessFilter(0, 89b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_PRIVATE | 90b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_STATIC, 91b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato memberVisitor))); 92b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 93b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 94b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 95b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 96b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) 97b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 98b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (visitThisMethod) 99b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 100b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato libraryMethod.accept(libraryClass, memberVisitor); 101b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 102b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 103b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (!isSpecial(libraryClass, libraryMethod)) 104b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 105b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato libraryClass.hierarchyAccept(false, 106b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato visitSuperMethods, 107b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato visitInterfaceMethods, 108b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato visitOverridingMethods, 109b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new NamedMethodVisitor(libraryMethod.getName(libraryClass), 110b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato libraryMethod.getDescriptor(libraryClass), 111b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato new MemberAccessFilter(0, 112b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_PRIVATE | 113b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_STATIC, 114b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato memberVisitor))); 115b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 116b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 117b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 118b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 119b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Small utility methods. 120b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 121b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private boolean isSpecial(Clazz clazz, Method method) 122b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 123b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return (method.getAccessFlags() & 124b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato (ClassConstants.INTERNAL_ACC_PRIVATE | 125b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_STATIC)) != 0 || 126b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato method.getName(clazz).equals(ClassConstants.INTERNAL_METHOD_NAME_INIT); 127b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 128b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato} 129