package org.apache.commons.ognl;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.Enumeration;

 import java.util.NoSuchElementException;

 /**

  * Implementation of ElementsAccessor that returns an iterator over integers from 0 up to the given target.

  *

  * @author Luke Blanshard (blanshlu@netscape.net)

  * @author Drew Davidson (drew@ognl.org)

  */

 public class NumberElementsAccessor

     implements ElementsAccessor, NumericTypes

 {

     /**

      * {@inheritDoc}

      */

     public Enumeration<?> getElements( final Object target )

     {

         return new Enumeration<Object>()

         {

             private int type = OgnlOps.getNumericType( target );

             private long next = 0;

             private long finish = OgnlOps.longValue( target );

             public boolean hasMoreElements()

             {

                 return next < finish;

             }

             public Object nextElement()

             {

                 if ( next >= finish )

                 {

                     throw new NoSuchElementException();

                 }

                 return OgnlOps.newInteger( type, next++ );

             }

         };

     }

 }