/*

     This file is part of Combean.

     Combean is free software; you can redistribute it and/or modify

     it under the terms of the GNU General Public License as published by

     the Free Software Foundation; either version 2 of the License, or

     (at your option) any later version.

     Combean 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 General Public License for more details.

     You should have received a copy of the GNU General Public License

     along with Combean; if not, write to the Free Software

     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

 /*

  * Created on 17.04.2005

  *

  */

 package net.sourceforge.combean.graph.containers;

 import java.util.HashMap;

 import java.util.Map;

 import net.sourceforge.combean.interfaces.graph.Graph;

 import net.sourceforge.combean.interfaces.graph.Node;

 import net.sourceforge.combean.interfaces.graph.containers.NodeNumbering;

 /**

  * @author schickin

  *

  */

 public class MapAsNodeNumbering implements NodeNumbering {

     private Map<Node, Integer> jMap = null;

     private int defaultValue = 0;

     /**

      * Constructor. Use a HashMap internally

      */

     public MapAsNodeNumbering() {

         super();

         this.jMap = new HashMap<Node, Integer>();

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.containers.NodeNumbering#init(net.sourceforge.combean.interfaces.graph.Graph)

      */

     public void init(Graph g) {

         this.jMap.clear();

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.containers.NodeNumbering#fill(int)

      */

     public void fill(int num) {

         this.defaultValue = num;

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.containers.NodeNumbering#setNumber(net.sourceforge.combean.interfaces.graph.Node, int)

      */

     public void setNumber(Node v, int num) {

         this.jMap.put(v, new Integer(num));

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.containers.NodeNumbering#getNumber(net.sourceforge.combean.interfaces.graph.Node)

      */

     public int getNumber(Node v) {

         Object entryInMap = this.jMap.get(v);

         if (entryInMap == null) {

             return this.defaultValue;

         }

         return ((Number) entryInMap).intValue();

     }

 }