| /* ==================================================================== |
| 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. |
| ==================================================================== */ |
| |
| package org.apache.poi.ss.formula.functions; |
| |
| import org.apache.poi.ss.formula.eval.BlankEval; |
| import org.apache.poi.ss.formula.eval.ErrorEval; |
| import org.apache.poi.ss.formula.eval.EvaluationException; |
| import org.apache.poi.ss.formula.eval.MissingArgEval; |
| import org.apache.poi.ss.formula.eval.OperandResolver; |
| import org.apache.poi.ss.formula.eval.ValueEval; |
| |
| /** |
| * @author Josh Micich |
| */ |
| public final class Choose implements Function { |
| |
| public ValueEval evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex) { |
| if (args.length < 2) { |
| return ErrorEval.VALUE_INVALID; |
| } |
| |
| try { |
| int ix = evaluateFirstArg(args[0], srcRowIndex, srcColumnIndex); |
| if (ix < 1 || ix >= args.length) { |
| return ErrorEval.VALUE_INVALID; |
| } |
| ValueEval result = OperandResolver.getSingleValue(args[ix], srcRowIndex, srcColumnIndex); |
| if (result == MissingArgEval.instance) { |
| return BlankEval.instance; |
| } |
| return result; |
| } catch (EvaluationException e) { |
| return e.getErrorEval(); |
| } |
| } |
| |
| public static int evaluateFirstArg(ValueEval arg0, int srcRowIndex, int srcColumnIndex) |
| throws EvaluationException { |
| ValueEval ev = OperandResolver.getSingleValue(arg0, srcRowIndex, srcColumnIndex); |
| return OperandResolver.coerceValueToInt(ev); |
| } |
| } |