/* ====================================================================
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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.SS.Formula.PTG
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{
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using System;
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using System.Text;
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/**
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* Unary Plus operator
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* does not have any effect on the operand
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* @author Avik Sengupta
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*/
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public class UnaryMinusPtg : ValueOperatorPtg
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{
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public const byte sid = 0x13;
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private static String MINUS = "-";
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public static ValueOperatorPtg instance = new UnaryMinusPtg();
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private UnaryMinusPtg()
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{
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// enforce singleton
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}
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protected override byte Sid
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{
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get { return sid; }
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}
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public override int NumberOfOperands
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{
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get { return 1; }
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}
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/** implementation of method from OperationsPtg*/
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public override String ToFormulaString(String[] operands)
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{
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StringBuilder buffer = new StringBuilder();
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buffer.Append(MINUS);
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buffer.Append(operands[0]);
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return buffer.ToString();
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}
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}
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}
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