package org.apache.ojb.odmg.collections;

 /* Copyright 2002-2005 The Apache Software Foundation

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 import java.util.Iterator;

 import org.apache.ojb.odmg.TransactionImpl;

 /**

  * Iterator implementation for {@link org.odmg.DSet} implementation.

  *

  * @version $Id: DSetIterator.java,v 1.1 2007-08-24 22:17:37 ewestfal Exp $

  */

 class DSetIterator implements Iterator

 {

     private Iterator iter;

     private DSetImpl dSet;

     private DSetEntry currentEntry = null;

     /**

      * DListIterator constructor comment.

      */

     public DSetIterator(DSetImpl set)

     {

         this.dSet = set;

         this.iter = set.getElements().iterator();

     }

     /**

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

      */

     public boolean hasNext()

     {

         return iter.hasNext();

     }

     /**

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

      */

     public Object next()

     {

         currentEntry = ((DSetEntry) iter.next());

         return currentEntry.getRealSubject();

     }

     /**

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

      */

     public void remove()

     {

         iter.remove();

         TransactionImpl tx = dSet.getTransaction();

         if (tx != null)

         {

             tx.markDelete(currentEntry);

         }

         currentEntry = null;

     }

 }