/*
 * 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.classfile.engine.bcel;

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.npe2.DefinitelyNullSetAnalysis;
import edu.umd.cs.findbugs.ba.npe2.DefinitelyNullSetDataflow;
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;

/**
 * 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;
	}
}