/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) Under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for Additional information regarding copyright ownership.
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The ASF licenses this file to You Under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed Under the License is distributed on an "AS Is" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations Under the License.
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==================================================================== */
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namespace HH.WMS.Utils.NPOI.HSSF.Model
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{
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using System;
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using System.Collections;
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using HH.WMS.Utils.NPOI.HSSF.Record;
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/// <summary>
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/// Simplifies iteration over a sequence of Record objects.
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/// @author Josh Micich
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/// </summary>
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public class RecordStream
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{
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private IList _list;
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private int _nextIndex;
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private int _endIx;
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private int _countRead;
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public RecordStream(IList inputList, int startIndex, int endIx)
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{
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_list = inputList;
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_nextIndex = startIndex;
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_endIx = endIx;
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_countRead = 0;
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}
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public RecordStream(IList records, int startIx):this(records, startIx, records.Count)
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{
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}
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/// <summary>
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/// Determines whether this instance has next.
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/// </summary>
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/// <returns>
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/// <c>true</c> if this instance has next; otherwise, <c>false</c>.
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/// </returns>
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public bool HasNext()
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{
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return _nextIndex < _endIx;
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}
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/// <summary>
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/// Gets the next record
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/// </summary>
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/// <returns></returns>
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public Record GetNext()
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{
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if (_nextIndex >= _list.Count)
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{
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throw new Exception("Attempt to Read past end of record stream");
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}
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_countRead++;
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return (Record)_list[_nextIndex++];
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}
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/// <summary>
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/// Peeks the next sid.
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/// </summary>
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/// <returns>-1 if at end of records</returns>
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public int PeekNextSid()
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{
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if (!HasNext())
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{
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return -1;
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}
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return ((Record)_list[_nextIndex]).Sid;
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}
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/// <summary>
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/// Peeks the next class.
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/// </summary>
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/// <returns>the class of the next Record.return null if this stream Is exhausted.</returns>
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public Type PeekNextClass()
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{
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if (_nextIndex >= _list.Count)
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{
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return null;
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}
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return _list[_nextIndex].GetType();
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}
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public int GetCountRead()
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{
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return _countRead;
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}
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}
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}
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