http://findbugs.sourceforge.net/: Findbugs: Because it's easy! 
/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2005, University of Maryland
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs;

import java.io.Serializable;
import java.util.Comparator;

import edu.umd.cs.findbugs.model.ClassNameRewriter;


Author:David Hovemeyer
/**
 * @author David Hovemeyer
 */
public interface WarningComparator extends Comparator<BugInstance>, Serializable {

    public abstract void setClassNameRewriter(ClassNameRewriter classNameRewriter);

    @Override
    public abstract int compare(BugInstance lhs, BugInstance rhs);

}