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.*; 24 25/** 26 * This <code>ClassVisitor</code> delegates its visits to another given 27 * <code>ClassVisitor</code>, except for classes are in a given list. 28 * 29 * @author Eric Lafortune 30 */ 31public class ExceptClassesFilter implements ClassVisitor 32{ 33 private final Clazz[] exceptClasses; 34 private final ClassVisitor classVisitor; 35 36 37 /** 38 * Creates a new ExceptClassesFilter. 39 * @param exceptClasses the classes that will not be visited. 40 * @param classVisitor the <code>ClassVisitor</code> to which visits will 41 * be delegated. 42 */ 43 public ExceptClassesFilter(Clazz[] exceptClasses, 44 ClassVisitor classVisitor) 45 { 46 this.exceptClasses = exceptClasses; 47 this.classVisitor = classVisitor; 48 } 49 50 51 // Implementations for ClassVisitor. 52 53 public void visitProgramClass(ProgramClass programClass) 54 { 55 if (!present(programClass)) 56 { 57 classVisitor.visitProgramClass(programClass); 58 } 59 } 60 61 62 public void visitLibraryClass(LibraryClass libraryClass) 63 { 64 if (!present(libraryClass)) 65 { 66 classVisitor.visitLibraryClass(libraryClass); 67 } 68 } 69 70 71 // Small utility methods. 72 73 private boolean present(Clazz clazz) 74 { 75 if (exceptClasses == null) 76 { 77 return false; 78 } 79 80 for (int index = 0; index < exceptClasses.length; index++) 81 { 82 if (exceptClasses[index].equals(clazz)) 83 { 84 return true; 85 } 86 } 87 88 return false; 89 } 90}