78 lines
2.5 KiB
Java
78 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.hssf.record.formula.functions;
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import org.apache.poi.hssf.record.formula.eval.ErrorEval;
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import org.apache.poi.hssf.record.formula.eval.MissingArgEval;
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import org.apache.poi.hssf.record.formula.eval.NumberEval;
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import org.apache.poi.hssf.record.formula.eval.ValueEval;
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import org.apache.poi.hssf.record.formula.functions.CountUtils.I_MatchPredicate;
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/**
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* Counts the number of cells that contain numeric data within
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* the list of arguments.
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*
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* Excel Syntax
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* COUNT(value1,value2,...)
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* Value1, value2, ... are 1 to 30 arguments representing the values or ranges to be counted.
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*
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* TODO: Check this properly matches excel on edge cases
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* like formula cells, error cells etc
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*/
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public final class Count implements Function {
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public ValueEval evaluate(ValueEval[] args, int srcCellRow, int srcCellCol) {
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int nArgs = args.length;
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if (nArgs < 1) {
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// too few arguments
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return ErrorEval.VALUE_INVALID;
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}
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if (nArgs > 30) {
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// too many arguments
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return ErrorEval.VALUE_INVALID;
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}
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int temp = 0;
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for(int i=0; i<nArgs; i++) {
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temp += CountUtils.countArg(args[i], predicate);
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}
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return new NumberEval(temp);
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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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if(valueEval instanceof NumberEval) {
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// only numbers are counted
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return true;
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}
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if(valueEval == MissingArgEval.instance) {
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// oh yeah, and missing arguments
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return true;
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}
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// error values and string values not counted
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return false;
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}
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};
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}
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