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/* $Id: MemberInfoNameConflictFilter.java,v 1.3 2005/06/11 13:21:35 eric Exp $
*
* ProGuard -- shrinking, optimization, and obfuscation of Java class files.
*
* Copyright (c) 2002-2005 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.MemberInfoVisitor;
import java.util.*;
/**
* This <code>MemberInfoVisitor</code> delegates its visits to another given
* <code>MemberInfoVisitor</code>, but only when the visited member has been
* marked as having a conflicting name.
*
* @see MemberInfoLinker
* @see MemberInfoObfuscator
*
* @author Eric Lafortune
*/
public class MemberInfoNameConflictFilter implements MemberInfoVisitor
{
private static final String CONFLICT = "_ CONFLICT _";
private MemberInfoVisitor memberInfoVisitor;
/**
* Creates a new MemberInfoNameConflictFilter.
* @param memberInfoVisitor the <code>MemberInfoVisitor</code> to which
* visits will be delegated.
*/
public MemberInfoNameConflictFilter(MemberInfoVisitor memberInfoVisitor)
{
this.memberInfoVisitor = memberInfoVisitor;
}
// Implementations for MemberInfoVisitor.
public void visitProgramFieldInfo(ProgramClassFile programClassFile, ProgramFieldInfo programFieldInfo)
{
if (hasConflictingName(programFieldInfo))
{
memberInfoVisitor.visitProgramFieldInfo(programClassFile, programFieldInfo);
}
}
public void visitProgramMethodInfo(ProgramClassFile programClassFile, ProgramMethodInfo programMethodInfo)
{
if (hasConflictingName(programMethodInfo))
{
memberInfoVisitor.visitProgramMethodInfo(programClassFile, programMethodInfo);
}
}
public void visitLibraryFieldInfo(LibraryClassFile libraryClassFile, LibraryFieldInfo libraryFieldInfo) {}
public void visitLibraryMethodInfo(LibraryClassFile libraryClassFile, LibraryMethodInfo libraryMethodInfo) {}
// Small utility methods.
/**
* Marks the given class member as having a conflicting name.
* @param memberInfo the class member.
*/
static void markConflictingName(MemberInfo memberInfo)
{
MemberInfoObfuscator.setNewMemberName(memberInfo, CONFLICT);
}
/**
* Returns whether the given class member has been marked as having a
* conflicting name.
* @param memberInfo the class member.
*/
static boolean hasConflictingName(MemberInfo memberInfo)
{
String newName = MemberInfoObfuscator.newMemberName(memberInfo);
return newName != null &&
newName.equals(CONFLICT);
}
}
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