001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.runtime.type.it; 020 021import java.util.Enumeration; 022import java.util.Iterator; 023 024import lucee.runtime.type.Collection; 025import lucee.runtime.type.Collection.Key; 026 027/** 028 * Iterator Implementation for a Object Array 029 */ 030public final class KeyIterator implements Iterator<Collection.Key>,Enumeration<Collection.Key> { 031 032 private Collection.Key[] arr; 033 private int pos; 034 035 /** 036 * constructor for the class 037 * @param arr Base Array 038 */ 039 public KeyIterator(Collection.Key[] arr) { 040 041 this.arr=arr==null?new Collection.Key[0]:arr; 042 this.pos=0; 043 } 044 045 @Override 046 public void remove() { 047 throw new UnsupportedOperationException("this operation is not suppored"); 048 } 049 050 @Override 051 public boolean hasNext() { 052 return (arr.length)>pos; 053 } 054 055 @Override 056 public Collection.Key next() { 057 Key key = arr[pos++]; 058 if(key==null) return null; 059 return key; 060 } 061 062 public boolean hasMoreElements() { 063 return hasNext(); 064 } 065 066 public Collection.Key nextElement() { 067 return next(); 068 } 069}