/*
|
* 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.
|
*/
|
/*
|
* Created on May 15, 2005
|
*
|
*/
|
namespace HH.WMS.Utils.NPOI.SS.Formula.Functions
|
{
|
using System;
|
using System.Text;
|
using HH.WMS.Utils.NPOI.SS.Formula.Eval;
|
|
/**
|
* An implementation of the Replace function:
|
* Replaces part of a text string based on the number of Chars
|
* you specify, with another text string.
|
* @author Manda Wilson < wilson at c bio dot msk cc dot org >
|
*/
|
public class Replace : TextFunction
|
{
|
|
/**
|
* Replaces part of a text string based on the number of Chars
|
* you specify, with another text string.
|
*
|
* @see org.apache.poi.hssf.record.formula.eval.Eval
|
*/
|
public override ValueEval EvaluateFunc(ValueEval[] args, int srcCellRow, int srcCellCol)
|
{
|
if (args.Length != 4)
|
{
|
return ErrorEval.VALUE_INVALID;
|
}
|
|
String oldStr = EvaluateStringArg(args[0], srcCellRow, srcCellCol);
|
int startNum = EvaluateIntArg(args[1], srcCellRow, srcCellCol);
|
int numChars = EvaluateIntArg(args[2], srcCellRow, srcCellCol);
|
String newStr = EvaluateStringArg(args[3], srcCellRow, srcCellCol);
|
|
if (startNum < 1 || numChars < 0)
|
{
|
return ErrorEval.VALUE_INVALID;
|
}
|
StringBuilder strBuff = new StringBuilder(oldStr);
|
// remove any characters that should be replaced
|
if (startNum <= oldStr.Length && numChars != 0)
|
{
|
strBuff.Remove(startNum - 1, startNum - 1 + numChars);
|
}
|
// now insert (or append) newStr
|
if (startNum > strBuff.Length)
|
{
|
strBuff.Append(newStr);
|
}
|
else
|
{
|
strBuff.Insert(startNum - 1, newStr);
|
}
|
return new StringEval(strBuff.ToString());
|
}
|
|
}
|
}
|
