| /* |
| * 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.ClassConstant; |
| 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 an 'instanceof' |
| * test by any of the instructions that it visits. |
| * |
| * @author Eric Lafortune |
| */ |
| public class InstanceofClassMarker |
| 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_INSTANCEOF) |
| { |
| clazz.constantPoolEntryAccept(constantInstruction.constantIndex, this); |
| } |
| } |
| |
| |
| // Implementations for ConstantVisitor. |
| |
| public void visitClassConstant(Clazz clazz, ClassConstant classConstant) |
| { |
| classConstant.referencedClassAccept(this); |
| } |
| |
| |
| // Implementations for ClassVisitor. |
| |
| public void visitLibraryClass(LibraryClass libraryClass) {} |
| |
| public void visitProgramClass(ProgramClass programClass) |
| { |
| setInstanceofed(programClass); |
| } |
| |
| |
| // Small utility methods. |
| |
| private static void setInstanceofed(Clazz clazz) |
| { |
| ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz); |
| if (info != null) |
| { |
| info.setInstanceofed(); |
| } |
| } |
| |
| |
| public static boolean isInstanceofed(Clazz clazz) |
| { |
| ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz); |
| return info == null || info.isInstanceofed(); |
| } |
| } |