1b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/* 2b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ProGuard -- shrinking, optimization, obfuscation, and preverification 3b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * of Java bytecode. 4b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 5b9cc48a43ed984587c939d02fba5316bf5c0df6eYing Wang * Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu) 6b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 7b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is free software; you can redistribute it and/or modify it 8b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * under the terms of the GNU General Public License as published by the Free 9b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Software Foundation; either version 2 of the License, or (at your option) 10b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * any later version. 11b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 12b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is distributed in the hope that it will be useful, but WITHOUT 13b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * more details. 16b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 17b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * You should have received a copy of the GNU General Public License along 18b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * with this program; if not, write to the Free Software Foundation, Inc., 19b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 21b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopackage proguard.classfile.visitor; 22b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 23b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.*; 24b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.util.SimplifiedVisitor; 25b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 26b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/** 27b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This <code>MemberVisitor</code> delegates its visits to methods to 28b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * another given <code>MemberVisitor</code>, but only when the visited 29b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * method may have implementations. 30b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 31b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @see Clazz#mayHaveImplementations(Method) 32b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @author Eric Lafortune 33b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 34b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopublic class MethodImplementationFilter 35b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoextends SimplifiedVisitor 36b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimplements MemberVisitor 37b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato{ 38b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private final MemberVisitor memberVisitor; 39b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 40b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 41b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 42b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Creates a new MethodImplementationFilter. 43b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param memberVisitor the <code>MemberVisitor</code> to which 44b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * visits will be delegated. 45b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 46b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public MethodImplementationFilter(MemberVisitor memberVisitor) 47b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 48b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato this.memberVisitor = memberVisitor; 49b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 50b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 51b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 52b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for MemberVisitor. 53b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 54b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) 55b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 56b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (programClass.mayHaveImplementations(programMethod)) 57b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 58b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato memberVisitor.visitProgramMethod(programClass, programMethod); 59b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 60b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 61b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 62b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 63b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) 64b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 65b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (libraryClass.mayHaveImplementations(libraryMethod)) 66b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 67b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato memberVisitor.visitLibraryMethod(libraryClass, libraryMethod); 68b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 69b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 70b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato} 71