/*
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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 14, 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 abstract class StringOperationEval : OperationEval
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{
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/**
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* Returns an is StringValueEval or ErrorEval or BlankEval
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*
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* @param eval
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* @param srcRow
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* @param srcCol
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*/
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protected ValueEval SingleOperandEvaluate(Eval eval, int srcRow, short srcCol)
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{
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ValueEval retval;
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if (eval is AreaEval)
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{
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AreaEval ae = (AreaEval)eval;
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if (ae.Contains(srcRow, srcCol))
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{ // circular ref!
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retval = ErrorEval.CIRCULAR_REF_ERROR;
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}
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else if (ae.IsRow)
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{
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if (ae.ContainsColumn(srcCol))
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{
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ValueEval ve = ae.GetValue(ae.FirstRow, srcCol);
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retval = InternalResolveEval(eval);
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}
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else
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{
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retval = ErrorEval.NAME_INVALID;
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}
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}
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else if (ae.IsColumn)
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{
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if (ae.ContainsRow(srcRow))
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{
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ValueEval ve = ae.GetValue(srcRow, ae.FirstColumn);
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retval = InternalResolveEval(eval);
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}
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else
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{
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retval = ErrorEval.NAME_INVALID;
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}
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}
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else
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{
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retval = ErrorEval.NAME_INVALID;
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}
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}
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else
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{
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retval = InternalResolveEval(eval);
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}
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return retval;
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}
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private ValueEval InternalResolveEval(Eval eval)
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{
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ValueEval retval;
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if (eval is StringValueEval)
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{
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retval = (StringValueEval)eval;
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}
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else if (eval is RefEval)
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{
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RefEval re = (RefEval)eval;
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ValueEval tve = re.InnerValueEval;
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if (tve is StringValueEval || tve is BlankEval)
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{
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retval = tve;
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}
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else
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{
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retval = ErrorEval.NAME_INVALID;
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}
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}
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else if (eval is BlankEval)
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{
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retval = (BlankEval)eval;
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}
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else
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{
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retval = ErrorEval.NAME_INVALID;
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}
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return retval;
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}
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public abstract Eval Evaluate(Eval[] evals, int srcCellRow, short srcCellCol);
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public abstract int NumberOfOperands { get; }
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}
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}
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