/*

     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 30.08.2005

  *

  */

 package net.sourceforge.combean.graph.containers.doubleval;

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

 import net.sourceforge.combean.interfaces.graph.containers.doubleval.FixedDoubleNodeMap;

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

 /**

  * Decorator for a double node map. Scales the values before returning them.

  * 

  * @author schickin

  *

  */

 public class ScalingDoubleNodeMapDecorator implements FixedDoubleNodeMap {

     private FixedDoubleNodeMap wrappedNodeMap = null;

     private double scalingFactor = 1.0;

     /**

      * Constructor

      * 

      * @param wrappedNodeMap the double node map to scale

      * @param scalingFactor the scaling factor

      */

     public ScalingDoubleNodeMapDecorator(FixedDoubleNodeMap wrappedNodeMap,

             double scalingFactor) {

         super();

         if (wrappedNodeMap == null) {

             throw new IllegalParameterException("wrappedNodeMap is null");

         }

         this.wrappedNodeMap = wrappedNodeMap;

         this.scalingFactor = scalingFactor;

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.graph.containers.doubleval.FixedDoubleNodeMap#getDouble(net.sourceforge.combean.interfaces.graph.Node)

      */

     public double getDouble(Node v) {

          return this.wrappedNodeMap.getDouble(v) * this.scalingFactor;

     }

 }