| /* ==================================================================== |
| 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.eval; |
| |
| import org.apache.poi.ss.formula.functions.ArrayFunction; |
| import org.apache.poi.ss.formula.functions.Fixed1ArgFunction; |
| import org.apache.poi.ss.formula.functions.Function; |
| |
| |
| public final class UnaryPlusEval extends Fixed1ArgFunction implements ArrayFunction { |
| |
| public static final Function instance = new UnaryPlusEval(); |
| |
| private UnaryPlusEval() { |
| // enforce singleton |
| } |
| |
| public ValueEval evaluate(int srcCellRow, int srcCellCol, ValueEval arg0) { |
| double d; |
| try { |
| ValueEval ve = OperandResolver.getSingleValue(arg0, srcCellRow, srcCellCol); |
| if(ve instanceof StringEval) { |
| // Note - asymmetric with UnaryMinus |
| // -"hello" evaluates to #VALUE! |
| // but +"hello" evaluates to "hello" |
| return ve; |
| } |
| d = OperandResolver.coerceValueToDouble(ve); |
| } catch (EvaluationException e) { |
| return e.getErrorEval(); |
| } |
| return new NumberEval(+d); |
| } |
| |
| @Override |
| public ValueEval evaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex){ |
| if (args.length != 1) { |
| return ErrorEval.VALUE_INVALID; |
| } |
| return evaluateOneArrayArg(args[0], srcRowIndex, srcColumnIndex, (valA) -> |
| evaluate(srcRowIndex, srcColumnIndex, valA) |
| ); |
| } |
| |
| } |