/*
 * Bytecode Analysis Framework
 * Copyright (C) 2003,2004 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.ba.type;

import org.apache.bcel.generic.Type;

import edu.umd.cs.findbugs.ba.DataflowAnalysisException;

/**
 * Interface for object which merges types for TypeAnalysis. By allowing
 * multiple implementations, we allow creation of specialized type systems.
 *
 * @author David Hovemeyer
 * @see TypeAnalysis
 */
public interface TypeMerger {
    /**
     * Merge type Types.
     *
     * @param a
     *            a Type
     * @param b
     *            a Type
     * @return the result of merging the two Types
     */
    public Type mergeTypes(Type a, Type b) throws DataflowAnalysisException;
}

