/* $Id: ClassFileOpener.java,v 1.2.2.1 2006/01/16 22:57:56 eric Exp $ * * ProGuard -- shrinking, optimization, and obfuscation of Java class files. * * Copyright (c) 2002-2006 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.obfuscate;import proguard.classfile.*;import proguard.classfile.editor.ConstantPoolEditor;import proguard.classfile.attribute.*;import proguard.classfile.attribute.annotation.*;import proguard.classfile.util.*;import proguard.classfile.visitor.*;/** * This <code>ClassFileVisitor</code> makes package visible classes and class * members public. * * @author Eric Lafortune */public class ClassFileOpener  implements ClassFileVisitor,             MemberInfoVisitor{    // Implementations for ClassFileVisitor.    public void visitProgramClassFile(ProgramClassFile programClassFile)    {        // Make the class public, if it is package visible.        makePackageVisible(programClassFile);        // Make package visible class members public.        programClassFile.fieldsAccept(this);        programClassFile.methodsAccept(this);    }    public void visitLibraryClassFile(LibraryClassFile libraryClassFile) {}    // Implementations for MemberInfoVisitor.    public void visitProgramFieldInfo(ProgramClassFile programClassFile, ProgramFieldInfo programFieldInfo)    {        makePackageVisible(programFieldInfo);    }    public void visitProgramMethodInfo(ProgramClassFile programClassFile, ProgramMethodInfo programMethodInfo)    {        makePackageVisible(programMethodInfo);    }    public void visitLibraryFieldInfo(LibraryClassFile libraryClassFile, LibraryFieldInfo libraryFieldInfo) {}    public void visitLibraryMethodInfo(LibraryClassFile libraryClassFile, LibraryMethodInfo libraryMethodInfo) {}    // Small utility methods.    /**     * Makes the given class file public, if it is package visible.     */    private void makePackageVisible(ProgramClassFile programClassFile)    {        if (isPackageVisible(programClassFile.u2accessFlags))        {            programClassFile.u2accessFlags = makePublic(programClassFile.u2accessFlags);        }    }    /**     * Makes the given class member public, if it is package visible.     */    private void makePackageVisible(ProgramMemberInfo programMemberInfo)    {        if (isPackageVisible(programMemberInfo.u2accessFlags))        {            programMemberInfo.u2accessFlags = makePublic(programMemberInfo.u2accessFlags);        }    }    /**     * Returns whether the given access flags specify a package visible class     * or class member (including public or protected access).     */    private boolean isPackageVisible(int accessFlags)    {        return AccessUtil.accessLevel(accessFlags) >= AccessUtil.PACKAGE_VISIBLE;    }    /**     * Returns the given access flags, modified such that the class or class     * member becomes public.     */    private int makePublic(int accessFlags)    {        return AccessUtil.replaceAccessFlags(accessFlags,                                             ClassConstants.INTERNAL_ACC_PUBLIC);    }}