51 lines
1.4 KiB
Java
51 lines
1.4 KiB
Java
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/*
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* Copyright (c) 2005,2008 Declarative Engineering LLC.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Declarative Engineering LLC
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* verson 1 which accompanies this distribution, and is available at
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* http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
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*/
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package com.common.util;
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/*
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* A simple empty iterator singleton.
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*/
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public final class EmptyIterator implements IIterator {
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/** The one and only empty iterator object. */
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private static EmptyIterator singleton = new EmptyIterator();
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/**
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* Gets the single instance of this iterator.
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* @return The one and only empty iterator object.
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*/
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public static IIterator getSingleton() {
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return singleton;
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}//getSingleton()//
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/**
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* EmptyIterator constructor.
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*/
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private EmptyIterator() {
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}//EmptyIterator()//
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/* (non-Javadoc)
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* @see com.common.util.IIterator#hasNext()
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*/
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public boolean hasNext() {
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return false;
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}//hasNext()//
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/* (non-Javadoc)
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* @see com.common.util.IIterator#next()
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*/
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public Object next() {
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throw new IndexOutOfBoundsException("Empty iterator.");
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}//next()//
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/* (non-Javadoc)
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* @see com.common.util.IIterator#remove()
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*/
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public boolean remove() {
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return false;
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}//remove()//
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/* (non-Javadoc)
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* @see com.common.util.IIterator#resetToFront()
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*/
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public void resetToFront() {
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}//resetToFront()//
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}//EmptyIterator//
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