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/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003-2008, 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.plan;

import edu.umd.cs.findbugs.graph.AbstractGraph;

/**
 * Graph of Detector ordering constraints. It may represent ordering constraints
 * between analysis passes, or ordering constraints within a single pass. Edges
 * flow from earlier detectors to later detectors.
 *
 * @see DetectorNode
 * @see ConstraintEdge
 * @see ExecutionPlan
 * @author David Hovemeyer
 */
public class ConstraintGraph extends AbstractGraph {
    @Override
    protected ConstraintEdge allocateEdge(DetectorNode source, DetectorNode target) {
        return new ConstraintEdge(source, target);
    }

    @Override
    public String toString() {
        return "ConstraintGraph[Vertices: " + getNumVertices() + " Edges: " + getNumEdges() + "]";
    }
}