/* ====================================================================
Licensed to the Apache Software Foundation (ASF) Under one or more
contributor license agreements. See the NOTICE file distributed with
this work for Additional information regarding copyright ownership.
The ASF licenses this file to You Under the Apache 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.apache.org/licenses/LICENSE-2.0
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.
==================================================================== */
namespace HH.WMS.Utils.NPOI.HSSF.Model
{
using System;
using System.Collections;
using HH.WMS.Utils.NPOI.HSSF.Record;
///
/// Simplifies iteration over a sequence of Record objects.
/// @author Josh Micich
///
public class RecordStream
{
private IList _list;
private int _nextIndex;
private int _endIx;
private int _countRead;
public RecordStream(IList inputList, int startIndex, int endIx)
{
_list = inputList;
_nextIndex = startIndex;
_endIx = endIx;
_countRead = 0;
}
public RecordStream(IList records, int startIx):this(records, startIx, records.Count)
{
}
///
/// Determines whether this instance has next.
///
///
/// true if this instance has next; otherwise, false.
///
public bool HasNext()
{
return _nextIndex < _endIx;
}
///
/// Gets the next record
///
///
public Record GetNext()
{
if (_nextIndex >= _list.Count)
{
throw new Exception("Attempt to Read past end of record stream");
}
_countRead++;
return (Record)_list[_nextIndex++];
}
///
/// Peeks the next sid.
///
/// -1 if at end of records
public int PeekNextSid()
{
if (!HasNext())
{
return -1;
}
return ((Record)_list[_nextIndex]).Sid;
}
///
/// Peeks the next class.
///
/// the class of the next Record.return null if this stream Is exhausted.
public Type PeekNextClass()
{
if (_nextIndex >= _list.Count)
{
return null;
}
return _list[_nextIndex].GetType();
}
public int GetCountRead()
{
return _countRead;
}
}
}