org.apache.poi.hssf.record.formula.functions.Subtotal Maven / Gradle / Ivy
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package org.apache.poi.hssf.record.formula.functions;
import org.apache.poi.hssf.record.formula.eval.ErrorEval;
import org.apache.poi.hssf.record.formula.eval.EvaluationException;
import org.apache.poi.hssf.record.formula.eval.OperandResolver;
import org.apache.poi.hssf.record.formula.eval.ValueEval;
import org.apache.poi.ss.formula.eval.NotImplementedException;
/**
* Implementation for the Excel function SUBTOTAL
*
* Syntax :
* SUBTOTAL ( functionCode, ref1, ref2 ... )
*
* functionCode (1-11) Selects the underlying aggregate function to be used (see table below) ref1, ref2 ... Arguments to be passed to the underlying aggregate function
*
*
*
* functionCode Aggregate Function 1 AVERAGE 2 COUNT 3 COUNTA 4 MAX 5 MIN 6 PRODUCT 7 STDEV 8 STDEVP * 9 AVERAGE 10 VAR * 11 VARP * 101-111 *
* * Not implemented in POI yet. Functions 101-111 are the same as functions 1-11 but with
* the option 'ignore hidden values'.
*
*
* @author Paul Tomlin < pault at bulk sms dot com >
*/
public class Subtotal implements Function {
private static Function findFunction(int functionCode) throws EvaluationException {
switch (functionCode) {
case 1: return AggregateFunction.AVERAGE;
case 2: return new Count();
case 3: return new Counta();
case 4: return AggregateFunction.MAX;
case 5: return AggregateFunction.MIN;
case 6: return AggregateFunction.PRODUCT;
case 7: return AggregateFunction.STDEV;
case 8: throw new NotImplementedException("STDEVP");
case 9: return AggregateFunction.SUM;
case 10: throw new NotImplementedException("VAR");
case 11: throw new NotImplementedException("VARP");
}
if (functionCode > 100 && functionCode < 112) {
throw new NotImplementedException("SUBTOTAL - with 'exclude hidden values' option");
}
throw EvaluationException.invalidValue();
}
public ValueEval evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
int nInnerArgs = args.length-1; // -1: first arg is used to select from a basic aggregate function
if (nInnerArgs < 1) {
return ErrorEval.VALUE_INVALID;
}
Function innerFunc;
try {
ValueEval ve = OperandResolver.getSingleValue(args[0], srcRowIndex, srcColumnIndex);
int functionCode = OperandResolver.coerceValueToInt(ve);
innerFunc = findFunction(functionCode);
} catch (EvaluationException e) {
return e.getErrorEval();
}
ValueEval[] innerArgs = new ValueEval[nInnerArgs];
System.arraycopy(args, 1, innerArgs, 0, nInnerArgs);
return innerFunc.evaluate(innerArgs, srcRowIndex, srcColumnIndex);
}
}