BN089-BS开发框架MVC4版/source20131023/Zephyr.Net/Zephyr.Utils/Document/Excel/NPOI/SS/Formula/Eval/NumberEval.cs

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/*
* 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 8, 2005
 *
 */
namespace Zephyr.Utils.NPOI.SS.Formula.Eval
{
    using System;
    using Zephyr.Utils.NPOI.SS.Formula.PTG;
    using Zephyr.Utils.NPOI.SS.Util;
    using System.Globalization;

    /**
     * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
     *  
     */
    public class NumberEval : NumericValueEval, StringValueEval
    {

        public static NumberEval ZERO = new NumberEval(0);

        private double _value;
        private String _stringValue;


        public NumberEval(Ptg ptg)
        {
            if (ptg is IntPtg)
            {
                this._value = ((IntPtg)ptg).Value;
            }
            else if (ptg is NumberPtg)
            {
                this._value = ((NumberPtg)ptg).Value;
            }
        }

        public NumberEval(double value)
        {
            this._value = value;
        }

        public double NumberValue
        {
            get { return _value; }