| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2009 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.peephole; |
| |
| import proguard.classfile.*; |
| import proguard.classfile.util.*; |
| import proguard.classfile.visitor.*; |
| import proguard.optimize.KeepMarker; |
| |
| /** |
| * This <code>MemberVisitor</code> makes the program methods that it visits |
| * final, if possible. |
| * |
| * @author Eric Lafortune |
| */ |
| public class MethodFinalizer |
| extends SimplifiedVisitor |
| implements MemberVisitor |
| { |
| private final MemberVisitor extraMemberVisitor; |
| |
| private final MemberFinder memberFinder = new MemberFinder(); |
| |
| |
| /** |
| * Creates a new ClassFinalizer. |
| */ |
| public MethodFinalizer() |
| { |
| this(null); |
| } |
| |
| |
| /** |
| * Creates a new ClassFinalizer. |
| * @param extraMemberVisitor an optional extra visitor for all finalized |
| * methods. |
| */ |
| public MethodFinalizer(MemberVisitor extraMemberVisitor) |
| { |
| this.extraMemberVisitor = extraMemberVisitor; |
| } |
| |
| |
| // Implementations for MemberVisitor. |
| |
| public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) |
| { |
| String name = programMethod.getName(programClass); |
| |
| // If the method is not already private/static/final/abstract, |
| // and it is not a constructor, |
| // and its class is final, |
| // or it is not being kept and it is not overridden, |
| // then make it final. |
| if ((programMethod.u2accessFlags & (ClassConstants.INTERNAL_ACC_PRIVATE | |
| ClassConstants.INTERNAL_ACC_STATIC | |
| ClassConstants.INTERNAL_ACC_FINAL | |
| ClassConstants.INTERNAL_ACC_ABSTRACT)) == 0 && |
| !name.equals(ClassConstants.INTERNAL_METHOD_NAME_INIT) && |
| ((programClass.u2accessFlags & ClassConstants.INTERNAL_ACC_FINAL) != 0 || |
| (!KeepMarker.isKept(programMethod) && |
| (programClass.subClasses == null || |
| !memberFinder.isOverriden(programClass, programMethod))))) |
| { |
| programMethod.u2accessFlags |= ClassConstants.INTERNAL_ACC_FINAL; |
| |
| // Visit the method, if required. |
| if (extraMemberVisitor != null) |
| { |
| extraMemberVisitor.visitProgramMethod(programClass, programMethod); |
| } |
| } |
| } |
| } |