121 lines
3.4 KiB
Java
121 lines
3.4 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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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.AreaEval;
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import org.apache.poi.hssf.record.formula.eval.BlankEval;
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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.Eval;
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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.RefEval;
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import org.apache.poi.hssf.record.formula.eval.StringEval;
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import org.apache.poi.hssf.record.formula.eval.ValueEval;
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/**
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* Counts the number of cells that contain data within the list of arguments.
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*
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* Excel Syntax
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* COUNTA(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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* @author Josh Micich
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*/
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public final class Counta implements Function {
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public Eval evaluate(Eval[] args, int srcCellRow, short 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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// Note - observed behavior of Excel:
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// Error values like #VALUE!, #REF!, #DIV/0!, #NAME? etc don't cause this COUNTA to return an error
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// in fact, they seem to get counted
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for(int i=0; i<nArgs; i++) {
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temp += countArg(args[i]);
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}
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return new NumberEval(temp);
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}
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private static int countArg(Eval eval) {
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if (eval instanceof AreaEval) {
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AreaEval ae = (AreaEval) eval;
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return countAreaEval(ae);
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}
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if (eval instanceof RefEval) {
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RefEval refEval = (RefEval)eval;
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return countValue(refEval.getInnerValueEval());
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}
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if (eval instanceof NumberEval) {
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return 1;
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}
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if (eval instanceof StringEval) {
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return 1;
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}
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throw new RuntimeException("Unexpected eval type (" + eval.getClass().getName() + ")");
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}
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private static int countAreaEval(AreaEval ae) {
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int temp = 0;
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ValueEval[] values = ae.getValues();
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for (int i = 0; i < values.length; i++) {
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ValueEval val = values[i];
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if(val == null) {
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// seems to occur. Really we would have expected BlankEval
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continue;
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}
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temp += countValue(val);
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}
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return temp;
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}
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private static int countValue(ValueEval valueEval) {
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if(valueEval == BlankEval.INSTANCE) {
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return 0;
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}
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if(valueEval instanceof BlankEval) {
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// wouldn't need this if BlankEval was final
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return 0;
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}
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if(valueEval instanceof ErrorEval) {
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// note - error values are counted
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return 1;
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}
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// also empty strings and zeros are counted too
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return 1;
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}
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}
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