| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu) |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| package proguard.classfile.visitor; |
| |
| import proguard.classfile.*; |
| import proguard.classfile.util.SimplifiedVisitor; |
| |
| /** |
| * This <code>MemberVisitor</code> lets a given <code>MemberVisitor</code> |
| * travel to all concrete and abstract implementations of the visited methods |
| * in their class hierarchies. |
| * |
| * @author Eric Lafortune |
| */ |
| public class MethodImplementationTraveler |
| extends SimplifiedVisitor |
| implements MemberVisitor |
| { |
| private final boolean visitThisMethod; |
| private final boolean visitSuperMethods; |
| private final boolean visitInterfaceMethods; |
| private final boolean visitOverridingMethods; |
| private final MemberVisitor memberVisitor; |
| |
| |
| /** |
| * Creates a new MethodImplementationTraveler. |
| * @param visitThisMethod specifies whether to visit the originally |
| * visited methods. |
| * @param visitSuperMethods specifies whether to visit the method in |
| * the super classes. |
| * @param visitInterfaceMethods specifies whether to visit the method in |
| * the interface classes. |
| * @param visitOverridingMethods specifies whether to visit the method in |
| * the subclasses. |
| * @param memberVisitor the <code>MemberVisitor</code> to which |
| * visits will be delegated. |
| */ |
| public MethodImplementationTraveler(boolean visitThisMethod, |
| boolean visitSuperMethods, |
| boolean visitInterfaceMethods, |
| boolean visitOverridingMethods, |
| MemberVisitor memberVisitor) |
| { |
| this.visitThisMethod = visitThisMethod; |
| this.visitSuperMethods = visitSuperMethods; |
| this.visitInterfaceMethods = visitInterfaceMethods; |
| this.visitOverridingMethods = visitOverridingMethods; |
| this.memberVisitor = memberVisitor; |
| } |
| |
| |
| // Implementations for MemberVisitor. |
| |
| public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) |
| { |
| if (visitThisMethod) |
| { |
| programMethod.accept(programClass, memberVisitor); |
| } |
| |
| if (!isSpecial(programClass, programMethod)) |
| { |
| programClass.hierarchyAccept(false, |
| visitSuperMethods, |
| visitInterfaceMethods, |
| visitOverridingMethods, |
| new NamedMethodVisitor(programMethod.getName(programClass), |
| programMethod.getDescriptor(programClass), |
| new MemberAccessFilter(0, |
| ClassConstants.INTERNAL_ACC_PRIVATE | |
| ClassConstants.INTERNAL_ACC_STATIC, |
| memberVisitor))); |
| } |
| } |
| |
| |
| public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) |
| { |
| if (visitThisMethod) |
| { |
| libraryMethod.accept(libraryClass, memberVisitor); |
| } |
| |
| if (!isSpecial(libraryClass, libraryMethod)) |
| { |
| libraryClass.hierarchyAccept(false, |
| visitSuperMethods, |
| visitInterfaceMethods, |
| visitOverridingMethods, |
| new NamedMethodVisitor(libraryMethod.getName(libraryClass), |
| libraryMethod.getDescriptor(libraryClass), |
| new MemberAccessFilter(0, |
| ClassConstants.INTERNAL_ACC_PRIVATE | |
| ClassConstants.INTERNAL_ACC_STATIC, |
| memberVisitor))); |
| } |
| } |
| |
| |
| // Small utility methods. |
| |
| private boolean isSpecial(Clazz clazz, Method method) |
| { |
| return (method.getAccessFlags() & |
| (ClassConstants.INTERNAL_ACC_PRIVATE | |
| ClassConstants.INTERNAL_ACC_STATIC)) != 0 || |
| method.getName(clazz).equals(ClassConstants.INTERNAL_METHOD_NAME_INIT); |
| } |
| } |