/*

     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 22.03.2005

  *

  */

 package net.sourceforge.combean.adapters.drasys.graph;

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

 import net.sourceforge.combean.interfaces.graph.prop.AddNodeGraphProp;

 import net.sourceforge.combean.util.except.GraphModificationException;

 import drasys.or.graph.AddVertexI;

 import drasys.or.graph.DuplicateVertexException;

 import drasys.or.graph.VertexI;

 /**

  * @author schickin

  *

  */

 public class DRAGraphWithAddVertexIAsGraph extends DRAGraphAsGraph implements

         AddNodeGraphProp {

     private AddVertexI draGraph = null;

     /**

      * @param draGraph

      */

     public DRAGraphWithAddVertexIAsGraph(AddVertexI draGraph) {

         super(draGraph);

         this.draGraph = draGraph;

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.AddNodeGraphProp#addNode()

      */

     public final Node addNode() {

         Node result = null;

         try {

          result = addDraVertex();

         }

         catch (DuplicateVertexException e) {

             throw new GraphModificationException("node cannot be added", e);

         }

         return result;

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.AddNodeGraphProp#ensureNodeCapacity()

      */

     public final void ensureNodeCapacity(int nodeCapacity) {

          this.draGraph.ensureVertexCapacity(nodeCapacity);

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.AddNodeGraphProp#freeze()

      */

     public final void freeze() {

         /*

          nothing to do

          */

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.adapters.drasys.DRAGraphWithAddVertexIAsGraph#addDraVertex()

      */

     protected Node addDraVertex()

     throws DuplicateVertexException {

         VertexI newVertex = this.draGraph.addVertex(getNewNodeKey());

         return convertToNode(newVertex);

     }

     /**

      * @return a key for a newly added node

      */

     protected Object getNewNodeKey() {

         // TODO more intelligent handling for graph with external vertex keys

         return new Integer(this.draGraph.sizeOfVertices());

     }

 }