| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2009 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.*; |
| |
| |
| /** |
| * This <code>ClassVisitor</code> lets a given <code>ClassVisitor</code> |
| * travel to the first concrete subclasses down in its hierarchy of abstract |
| * classes and concrete classes. |
| * |
| * @author Eric Lafortune |
| */ |
| public class ConcreteClassDownTraveler |
| implements ClassVisitor |
| { |
| private final ClassVisitor classVisitor; |
| |
| |
| /** |
| * Creates a new ConcreteClassDownTraveler. |
| * @param classVisitor the <code>ClassVisitor</code> to |
| * which visits will be delegated. |
| */ |
| public ConcreteClassDownTraveler(ClassVisitor classVisitor) |
| { |
| this.classVisitor = classVisitor; |
| } |
| |
| |
| // Implementations for ClassVisitor. |
| |
| public void visitProgramClass(ProgramClass programClass) |
| { |
| // Is this an abstract class or an interface? |
| if ((programClass.getAccessFlags() & |
| (ClassConstants.INTERNAL_ACC_INTERFACE | |
| ClassConstants.INTERNAL_ACC_ABSTRACT)) != 0) |
| { |
| // Travel down the hierarchy. |
| Clazz[] subClasses = programClass.subClasses; |
| if (subClasses != null) |
| { |
| for (int index = 0; index < subClasses.length; index++) |
| { |
| subClasses[index].accept(this); |
| } |
| } |
| } |
| else |
| { |
| // Visit the class. Don't descend any further. |
| programClass.accept(classVisitor); |
| } |
| } |
| |
| |
| public void visitLibraryClass(LibraryClass libraryClass) |
| { |
| // Is this an abstract class or interface? |
| if ((libraryClass.getAccessFlags() & |
| (ClassConstants.INTERNAL_ACC_INTERFACE | |
| ClassConstants.INTERNAL_ACC_ABSTRACT)) != 0) |
| { |
| // Travel down the hierarchy. |
| Clazz[] subClasses = libraryClass.subClasses; |
| if (subClasses != null) |
| { |
| for (int index = 0; index < subClasses.length; index++) |
| { |
| subClasses[index].accept(this); |
| } |
| } |
| } |
| else |
| { |
| // Visit the class. Don't descend any further. |
| libraryClass.accept(classVisitor); |
| } |
| } |
| } |