001 // Copyright 2004, 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.tapestry.contrib.table.model.common; 016 017 import java.util.Iterator; 018 import java.util.NoSuchElementException; 019 020 /** 021 * @author mindbridge 022 */ 023 public class ArrayIterator implements Iterator 024 { 025 private Object[] m_arrValues; 026 private int m_nFrom; 027 private int m_nTo; 028 private int m_nCurrent; 029 030 public ArrayIterator(Object[] arrValues) 031 { 032 this(arrValues, 0, arrValues.length); 033 } 034 035 public ArrayIterator(Object[] arrValues, int nFrom, int nTo) 036 { 037 m_arrValues = arrValues; 038 m_nFrom = nFrom; 039 m_nTo = nTo; 040 041 if (m_nFrom < 0) 042 m_nFrom = 0; 043 if (m_nTo < m_nFrom) 044 m_nTo = m_nFrom; 045 if (m_nTo > m_arrValues.length) 046 m_nTo = m_arrValues.length; 047 048 m_nCurrent = m_nFrom; 049 } 050 051 /** 052 * @see java.util.Iterator#hasNext() 053 */ 054 public boolean hasNext() 055 { 056 return m_nCurrent < m_nTo; 057 } 058 059 /** 060 * @see java.util.Iterator#next() 061 */ 062 public Object next() 063 { 064 //System.out.println("index: " + m_nCurrent + " size: " + m_arrValues.length + " to: " + m_nTo); 065 if (!hasNext()) 066 throw new NoSuchElementException(); 067 return m_arrValues[m_nCurrent++]; 068 } 069 070 /** 071 * @see java.util.Iterator#remove() 072 */ 073 public void remove() 074 { 075 throw new UnsupportedOperationException(); 076 } 077 078 }