/* $Id: MemberInfoNameCollector.java,v 1.3.2.1 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.visitor.*;import java.io.IOException;import java.util.*;/** * This MemberInfoVisitor collects all new (obfuscation) names of the members * that it visits. * * @see MemberInfoLinker * @see MemberInfoObfuscator * * @author Eric Lafortune */public class MemberInfoNameCollector implements MemberInfoVisitor{    private boolean allowAggressiveOverloading;    private Map     descriptorMap;    /**     * Creates a new MemberInfoNameCollector.     * @param allowAggressiveOverloading a flag that specifies whether class     *                                   members can be overloaded aggressively.     * @param descriptorMap              the map of descriptors to     *                                   [new name - old name] maps.     */    public MemberInfoNameCollector(boolean allowAggressiveOverloading,                                   Map     descriptorMap)    {        this.allowAggressiveOverloading = allowAggressiveOverloading;        this.descriptorMap              = descriptorMap;    }    // Implementations for MemberInfoVisitor.    public void visitProgramFieldInfo(ProgramClassFile programClassFile, ProgramFieldInfo programFieldInfo)    {        collectName(programClassFile, programFieldInfo);    }    public void visitProgramMethodInfo(ProgramClassFile programClassFile, ProgramMethodInfo programMethodInfo)    {        collectName(programClassFile, programMethodInfo);    }    public void visitLibraryFieldInfo(LibraryClassFile libraryClassFile, LibraryFieldInfo libraryFieldInfo)    {        collectName(libraryClassFile, libraryFieldInfo);    }    public void visitLibraryMethodInfo(LibraryClassFile libraryClassFile, LibraryMethodInfo libraryMethodInfo)    {        collectName(libraryClassFile, libraryMethodInfo);    }    /**     * Inserts the new name of the given class member into the map.     * @param classFile  the class file of the given member.     * @param memberInfo the class member to be linked.     */    private void collectName(ClassFile classFile, MemberInfo memberInfo)    {        // Special cases: <clinit> and <init> are always kept unchanged.        // We can ignore them here.        String name = memberInfo.getName(classFile);        if (name.equals(ClassConstants.INTERNAL_METHOD_NAME_CLINIT) ||            name.equals(ClassConstants.INTERNAL_METHOD_NAME_INIT))        {            return;        }        // Get the member's new name.        String newName = MemberInfoObfuscator.newMemberName(memberInfo);        // Remember it, if it has already been set.        if (newName != null)        {            // Get the member's descriptor.            String descriptor = memberInfo.getDescriptor(classFile);            // Check whether we're allowed to do aggressive overloading            if (!allowAggressiveOverloading)            {                // Trim the return argument from the descriptor if not.                // Works for fields and methods alike.                descriptor = descriptor.substring(0, descriptor.indexOf(')')+1);            }            // Put the [descriptor - new name] in the map,            // creating a new [new name - old name] map if necessary.            Map newNameMap = MemberInfoObfuscator.retrieveNameMap(descriptorMap, descriptor);            // Is the other original name different from this original name?            if (newNameMap.get(newName) == null ||                MemberInfoObfuscator.hasFixedNewMemberName(memberInfo))            {                // Remember not to use the new name again in this name space.                newNameMap.put(newName, name);            }        }    }}