/* * 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 Nov 25, 2006 * */ namespace HH.WMS.Utils.NPOI.SS.Formula.Functions { using System; using HH.WMS.Utils.NPOI.SS.Formula.Eval; /** * @author Amol S. Deshmukh < amolweb at ya hoo dot com > * */ public class If : Var2or3ArgFunction { public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) { bool b; try { b = EvaluateFirstArg(arg0, srcRowIndex, srcColumnIndex); } catch (EvaluationException e) { return e.GetErrorEval(); } if (b) { if (arg1 == MissingArgEval.instance) { return BlankEval.instance; } return arg1; } return BoolEval.FALSE; } public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1, ValueEval arg2) { bool b; try { b = EvaluateFirstArg(arg0, srcRowIndex, srcColumnIndex); } catch (EvaluationException e) { return e.GetErrorEval(); } if (b) { if (arg1 == MissingArgEval.instance) { return BlankEval.instance; } return arg1; } if (arg2 == MissingArgEval.instance) { return BlankEval.instance; } return arg2; } public static bool EvaluateFirstArg(ValueEval arg, int srcCellRow, int srcCellCol) { ValueEval ve = OperandResolver.GetSingleValue(arg, srcCellRow, srcCellCol); bool? b = OperandResolver.CoerceValueToBoolean(ve, false); if (b == null) { return false; } return (bool)b; } } }