| /* |
| * 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>ClassVisitor</code> makes the program classes that it visits |
| * final, if possible. |
| * |
| * @author Eric Lafortune |
| */ |
| public class ClassFinalizer |
| extends SimplifiedVisitor |
| implements ClassVisitor |
| { |
| private final ClassVisitor extraClassVisitor; |
| |
| |
| /** |
| * Creates a new ClassFinalizer. |
| */ |
| public ClassFinalizer() |
| { |
| this(null); |
| } |
| |
| |
| /** |
| * Creates a new ClassFinalizer. |
| * @param extraClassVisitor an optional extra visitor for all finalized |
| * classes. |
| */ |
| public ClassFinalizer(ClassVisitor extraClassVisitor) |
| { |
| this.extraClassVisitor = extraClassVisitor; |
| } |
| |
| |
| // Implementations for ClassVisitor. |
| |
| public void visitProgramClass(ProgramClass programClass) |
| { |
| // If the class is not final/interface/abstract, |
| // and it is not being kept, |
| // and it doesn't have any subclasses, |
| // then make it final. |
| if ((programClass.u2accessFlags & (ClassConstants.INTERNAL_ACC_FINAL | |
| ClassConstants.INTERNAL_ACC_INTERFACE | |
| ClassConstants.INTERNAL_ACC_ABSTRACT)) == 0 && |
| !KeepMarker.isKept(programClass) && |
| programClass.subClasses == null) |
| { |
| programClass.u2accessFlags |= ClassConstants.INTERNAL_ACC_FINAL; |
| |
| // Visit the class, if required. |
| if (extraClassVisitor != null) |
| { |
| extraClassVisitor.visitProgramClass(programClass); |
| } |
| } |
| } |
| } |