/*

  * Copyright 2005-2008 The Kuali Foundation

  * 

  * 

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  * 

  * 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.

  */

 package org.kuali.rice.kew.util;

 import java.util.ArrayList;

 import java.util.Enumeration;

 import java.util.Iterator;

 import java.util.List;

 /*

  * A simple Enumeration implementation which is backed by a List and it's Iterator.

  * Provides a few convienance constructors for creating the Enumeration.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class SimpleEnumeration<T> implements Enumeration<T> {

         private List<T> internalList = new ArrayList<T>();

         private Iterator<T> iterator;

         public SimpleEnumeration(T object) {

                 if (object != null) {

                         internalList.add(object);

                 }

                 iterator = internalList.iterator();

         }

         public SimpleEnumeration(Enumeration<T> enumeration, T object) {

                 while (enumeration.hasMoreElements()) {

                         internalList.add(enumeration.nextElement());

                 }

                 internalList.add(object);

                 iterator = internalList.iterator();

         }

         public SimpleEnumeration(Enumeration<T> enumeration1, Enumeration<T> enumeration2) {

                 while (enumeration1.hasMoreElements()) {

                         internalList.add(enumeration1.nextElement());

                 }

                 while (enumeration2.hasMoreElements()) {

                         internalList.add(enumeration2.nextElement());

                 }

                 iterator = internalList.iterator();

         }

         public boolean hasMoreElements() {

                 return iterator.hasNext();

         }

         public T nextElement() {

                 return iterator.next();

         }

 }