/*

     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 22.04.2005

  *

  */

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

 import java.util.Enumeration;

 import net.sourceforge.combean.interfaces.mathprog.linalg.SparseVector;

 import net.sourceforge.combean.interfaces.mathprog.linalg.VectorIterator;

 import net.sourceforge.combean.interfaces.mathprog.linalg.VectorValue;

 import net.sourceforge.combean.interfaces.mathprog.lp.model.NoLabel;

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

 import drasys.or.matrix.VectorElementI;

 import drasys.or.matrix.VectorI;

 /**

  * Wrap a VectorI as SparseVec.

  * 

  * @author schickin

  *

  */

 public class VectorIAsSparseVector implements SparseVector {

     private VectorI draVec = null;

     /**

      * Constructor.

      * 

      * @param draVec the VectorI to be wrapped.

      */

     public VectorIAsSparseVector(VectorI draVec) {

         super();

         this.draVec = draVec;

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.mathprog.SparseVector#getDimension()

      */

     public int getDimension() {

          return this.draVec.size();

     }

     /**

      * A private class, representing a suitable VectorIterator-implementation

      * 

      * @author schickin

      *

      */

     private class VectorIEnumerationAsVectorIterator

     implements VectorIterator<NoLabel> {

         private Enumeration vecEnum = null;

         /**

          * Constructor

          * 

          * @param vec the vector to be iterated through.

          */

         public VectorIEnumerationAsVectorIterator(VectorI vec) {

             super();

             this.vecEnum = vec.elements();

         }

         /* (non-Javadoc)

          * @see net.sourceforge.combean.interfaces.mathprog.lp.VectorIterator#hasNext()

          */

         public boolean hasNext() {

              return this.vecEnum.hasMoreElements();

         }

         /* (non-Javadoc)

          * @see net.sourceforge.combean.interfaces.mathprog.lp.VectorIterator#next()

          */

         public VectorValue<NoLabel> next() {

             VectorElementI elem = (VectorElementI) this.vecEnum.nextElement();

             return new VectorElementIAsVectorValue(elem);

         }

         /* (non-Javadoc)

          * @see java.util.Iterator#remove()

          */

         public void remove() {

             throw new UnsupportedMethodException();

             // TODO Auto-generated method stub

             /*

              */

         }

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.mathprog.lp.SparseVector#getIterator()

      */

     public VectorIterator<NoLabel> iterator() {

          return new VectorIEnumerationAsVectorIterator(this.draVec);

     }

     /* (non-Javadoc)

      * @see net.sourceforge.combean.interfaces.mathprog.lp.SparseVector#getNumNonZeroEntries()

      */

     public int getNumIterations() {

          return this.draVec.sizeOfElements();

     }

 }