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 */ 21 package proguard.classfile.util; 22 23 import proguard.classfile.*; 24 import proguard.classfile.visitor.ClassVisitor; 25 26 /** 27 * This ClassVisitor adds all classes that it visits to the list of subclasses 28 * of their superclass. These subclass lists make it more convenient to travel 29 * 30 * @author Eric Lafortune 31 */ 32 public class ClassSubHierarchyInitializer 33 implements ClassVisitor 34 { 35 // Implementations for ClassVisitor. 36 visitProgramClass(ProgramClass programClass)37 public void visitProgramClass(ProgramClass programClass) 38 { 39 // Add this class to the subclasses of its superclass. 40 addSubclass(programClass, programClass.getSuperClass()); 41 42 // Add this class to the subclasses of its interfaces. 43 for (int index = 0; index < programClass.u2interfacesCount; index++) 44 { 45 addSubclass(programClass, programClass.getInterface(index)); 46 } 47 } 48 49 visitLibraryClass(LibraryClass libraryClass)50 public void visitLibraryClass(LibraryClass libraryClass) 51 { 52 // Add this class to the subclasses of its superclass, 53 addSubclass(libraryClass, libraryClass.superClass); 54 55 // Add this class to the subclasses of its interfaces. 56 Clazz[] interfaceClasses = libraryClass.interfaceClasses; 57 if (interfaceClasses != null) 58 { 59 for (int index = 0; index < interfaceClasses.length; index++) 60 { 61 // Add this class to the subclasses of the interface class. 62 addSubclass(libraryClass, interfaceClasses[index]); 63 } 64 } 65 } 66 67 68 // Small utility methods. 69 addSubclass(Clazz subclass, Clazz clazz)70 private void addSubclass(Clazz subclass, Clazz clazz) 71 { 72 if (clazz != null) 73 { 74 clazz.addSubClass(subclass); 75 } 76 } 77 } 78