1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2009 Eric Lafortune (eric (at) 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.optimize; 22 23 import proguard.classfile.*; 24 import proguard.classfile.visitor.MemberVisitor; 25 import proguard.optimize.info.*; 26 27 /** 28 * This <code>MemberVisitor</code> delegates its visits to another given 29 * <code>MemberVisitor</code>, but only when the visited member has optimization 30 * info. 31 * 32 * @see FieldOptimizationInfo 33 * @see MethodOptimizationInfo 34 * @author Eric Lafortune 35 */ 36 public class OptimizationInfoMemberFilter 37 implements MemberVisitor 38 { 39 private final MemberVisitor memberVisitor; 40 41 42 /** 43 * Creates a new OptimizationInfoMemberFilter. 44 * @param memberVisitor the <code>MemberVisitor</code> to which visits will 45 * be delegated. 46 */ 47 public OptimizationInfoMemberFilter(MemberVisitor memberVisitor) 48 { 49 this.memberVisitor = memberVisitor; 50 } 51 52 53 // Implementations for MemberVisitor. 54 55 56 public void visitProgramField(ProgramClass programClass, ProgramField programField) 57 { 58 // Does the field have optimization info? 59 if (FieldOptimizationInfo.getFieldOptimizationInfo(programField) != null) 60 { 61 memberVisitor.visitProgramField(programClass, programField); 62 } 63 } 64 65 66 public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField) 67 { 68 // Does the field have optimization info? 69 if (FieldOptimizationInfo.getFieldOptimizationInfo(libraryField) != null) 70 { 71 memberVisitor.visitLibraryField(libraryClass, libraryField); 72 } 73 } 74 75 76 public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) 77 { 78 // Does the method have optimization info? 79 if (MethodOptimizationInfo.getMethodOptimizationInfo(programMethod) != null) 80 { 81 memberVisitor.visitProgramMethod(programClass, programMethod); 82 } 83 } 84 85 86 public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) 87 { 88 // Does the method have optimization info? 89 if (MethodOptimizationInfo.getMethodOptimizationInfo(libraryMethod) != null) 90 { 91 memberVisitor.visitLibraryMethod(libraryClass, libraryMethod); 92 } 93 } 94 } 95