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- /* ====================================================================
- 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.atp;
-
- import org.apache.poi.ss.formula.OperationEvaluationContext;
- import org.apache.poi.ss.formula.eval.ErrorEval;
- import org.apache.poi.ss.formula.eval.EvaluationException;
- import org.apache.poi.ss.formula.eval.NumberEval;
- import org.apache.poi.ss.formula.eval.ValueEval;
- import org.apache.poi.ss.formula.functions.FreeRefFunction;
- import org.apache.poi.ss.usermodel.DateUtil;
-
- /**
- * Implementation of Excel 'Analysis ToolPak' function WORKDAY()<br>
- * Returns the date past a number of workdays beginning at a start date, considering an interval of holidays. A workday is any non
- * saturday/sunday date.
- * <p>
- * <b>Syntax</b><br>
- * <b>WORKDAY</b>(<b>startDate</b>, <b>days</b>, holidays)
- * <p>
- */
- final class WorkdayFunction implements FreeRefFunction {
-
- public static final FreeRefFunction instance = new WorkdayFunction(ArgumentsEvaluator.instance);
-
- private ArgumentsEvaluator evaluator;
-
- private WorkdayFunction(ArgumentsEvaluator anEvaluator) {
- // enforces singleton
- this.evaluator = anEvaluator;
- }
-
- /**
- * Evaluate for WORKDAY. Given a date, a number of days and a optional date or interval of holidays, determines which date it is past
- * number of parametrized workdays.
- *
- * @return {@link ValueEval} with date as its value.
- */
- public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
- if (args.length < 2 || args.length > 3) {
- return ErrorEval.VALUE_INVALID;
- }
-
- int srcCellRow = ec.getRowIndex();
- int srcCellCol = ec.getColumnIndex();
-
- double start;
- int days;
- double[] holidays;
- try {
- start = this.evaluator.evaluateDateArg(args[0], srcCellRow, srcCellCol);
- days = (int) Math.floor(this.evaluator.evaluateNumberArg(args[1], srcCellRow, srcCellCol));
- ValueEval holidaysCell = args.length == 3 ? args[2] : null;
- holidays = this.evaluator.evaluateDatesArg(holidaysCell, srcCellRow, srcCellCol);
- return new NumberEval(DateUtil.getExcelDate(WorkdayCalculator.instance.calculateWorkdays(start, days, holidays)));
- } catch (EvaluationException e) {
- return ErrorEval.VALUE_INVALID;
- }
- }
-
- }
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