/*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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/*
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* Created on May 8, 2005
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*
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*/
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namespace HH.WMS.Utils.NPOI.SS.Formula.Eval
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{
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/**
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* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
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*
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*/
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public interface OperationEval : Eval
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{
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/*
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* Read this, this will make your work easier when coding
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* an "Evaluate()"
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*
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* Things to note when implementing Evaluate():
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* 1. Check the Length of operands
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* (use "switch(operands[x])" if possible)
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*
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* 2. The possible Evals that you can Get as args to Evaluate are one of:
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* NumericValueEval, StringValueEval, RefEval, AreaEval
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* 3. If it is RefEval, the innerValueEval could be one of:
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* NumericValueEval, StringValueEval, BlankEval
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* 4. If it is AreaEval, each of the values could be one of:
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* NumericValueEval, StringValueEval, BlankEval, RefEval
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*
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* 5. For numeric functions/operations, keep the result in double
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* till the end and before returning a new NumberEval, Check to see
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* if the double is a NaN - if NaN, return ErrorEval.ERROR_503
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*/
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Eval Evaluate(Eval[] evals, int srcCellRow, short srcCellCol);
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int NumberOfOperands { get; }
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//int Type { get; }
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}
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}
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