/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2003-2007 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.npe2;

import edu.umd.cs.findbugs.ba.CFG;
import edu.umd.cs.findbugs.ba.CompactLocationNumbering;
import edu.umd.cs.findbugs.ba.DepthFirstSearch;
import edu.umd.cs.findbugs.ba.vna.ValueNumberDataflow;
import edu.umd.cs.findbugs.classfile.CheckedAnalysisException;
import edu.umd.cs.findbugs.classfile.IAnalysisCache;
import edu.umd.cs.findbugs.classfile.MethodDescriptor;
import edu.umd.cs.findbugs.classfile.engine.bcel.AnalysisFactory;

/**
 * Analysis engine to produce DefinitelyNullSetDataflow objects for analyzed
 * methods.
 * 
 * @author David Hovemeyer
 */
public class DefinitelyNullSetDataflowFactory extends AnalysisFactory<DefinitelyNullSetDataflow> {
    public DefinitelyNullSetDataflowFactory() {
        super("definitely null set dataflow", DefinitelyNullSetDataflow.class);
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * edu.umd.cs.findbugs.classfile.IAnalysisEngine#analyze(edu.umd.cs.findbugs
     * .classfile.IAnalysisCache, java.lang.Object)
     */
    public DefinitelyNullSetDataflow analyze(IAnalysisCache analysisCache, MethodDescriptor descriptor)
            throws CheckedAnalysisException {
        CFG cfg = getCFG(analysisCache, descriptor);
        DepthFirstSearch dfs = getDepthFirstSearch(analysisCache, descriptor);
        ValueNumberDataflow vnaDataflow = getValueNumberDataflow(analysisCache, descriptor);
        CompactLocationNumbering compactLocationNumbering = getCompactLocationNumbering(analysisCache, descriptor);

        DefinitelyNullSetAnalysis analysis = new DefinitelyNullSetAnalysis(dfs, vnaDataflow, compactLocationNumbering);
        DefinitelyNullSetDataflow dataflow = new DefinitelyNullSetDataflow(cfg, analysis);

        dataflow.execute();

        return dataflow;
    }
}
