61 lines
2.5 KiB
Java
61 lines
2.5 KiB
Java
/* ====================================================================
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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package org.apache.poi.ss.formula.functions;
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import org.apache.poi.ss.formula.ThreeDEval;
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import org.apache.poi.ss.formula.eval.*;
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import org.apache.poi.ss.formula.functions.CountUtils.I_MatchPredicate;
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/**
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* Implementation for the function COUNTBLANK
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* <p>
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* Syntax: COUNTBLANK ( range )
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* <table border="0" cellpadding="1" cellspacing="0" summary="Parameter descriptions">
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* <tr><th>range </th><td>is the range of cells to count blanks</td></tr>
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* </table>
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* </p>
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*
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* @author Mads Mohr Christensen
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*/
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public final class Countblank extends Fixed1ArgFunction {
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public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0) {
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double result;
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if (arg0 instanceof RefEval) {
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result = CountUtils.countMatchingCellsInRef((RefEval) arg0, predicate);
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} else if (arg0 instanceof ThreeDEval) {
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result = CountUtils.countMatchingCellsInArea((ThreeDEval) arg0, predicate);
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} else {
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throw new IllegalArgumentException("Bad range arg type (" + arg0.getClass().getName() + ")");
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}
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return new NumberEval(result);
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}
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private static final I_MatchPredicate predicate = new I_MatchPredicate() {
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public boolean matches(ValueEval valueEval) {
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// Note - only BlankEval counts
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return valueEval == BlankEval.instance ||
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// see https://support.office.com/en-us/article/COUNTBLANK-function-6a92d772-675c-4bee-b346-24af6bd3ac22
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// "Cells with formulas that return "" (empty text) are also counted."
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(valueEval instanceof StringEval && "".equals(((StringEval)valueEval).getStringValue()));
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}
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};
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}
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