/* * ProGuard -- shrinking, optimization, obfuscation, and preverification * of Java bytecode. * * Copyright (c) 2002-2011 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.optimize.info; import proguard.classfile.*; import proguard.classfile.attribute.CodeAttribute; import proguard.classfile.constant.*; import proguard.classfile.constant.visitor.ConstantVisitor; import proguard.classfile.instruction.*; import proguard.classfile.instruction.visitor.InstructionVisitor; import proguard.classfile.util.SimplifiedVisitor; import proguard.classfile.visitor.ClassVisitor; /** * This InstructionVisitor marks all classes that are used in a .class * construct by any of the instructions that it visits. * * @author Eric Lafortune */ public class DotClassMarker extends SimplifiedVisitor implements InstructionVisitor, ConstantVisitor, ClassVisitor { // Implementations for InstructionVisitor. public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) {} public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction) { if (constantInstruction.opcode == InstructionConstants.OP_LDC || constantInstruction.opcode == InstructionConstants.OP_LDC_W) { clazz.constantPoolEntryAccept(constantInstruction.constantIndex, this); } } // Implementations for ConstantVisitor. public void visitAnyConstant(Clazz clazz, Constant constant) {} public void visitClassConstant(Clazz clazz, ClassConstant classConstant) { classConstant.referencedClassAccept(this); } // Implementations for ClassVisitor. public void visitLibraryClass(LibraryClass libraryClass) {} public void visitProgramClass(ProgramClass programClass) { setDotClassed(programClass); } // Small utility methods. private static void setDotClassed(Clazz clazz) { ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz); if (info != null) { info.setDotClassed(); } } public static boolean isDotClassed(Clazz clazz) { ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz); return info == null || info.isDotClassed(); } }