org.apache.poi.ss.formula.functions.IfFunc Maven / Gradle / Ivy
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package org.apache.poi.ss.formula.functions;
import org.apache.poi.ss.formula.eval.BlankEval;
import org.apache.poi.ss.formula.eval.BoolEval;
import org.apache.poi.ss.formula.eval.EvaluationException;
import org.apache.poi.ss.formula.eval.MissingArgEval;
import org.apache.poi.ss.formula.eval.OperandResolver;
import org.apache.poi.ss.formula.eval.ValueEval;
import org.apache.poi.ss.formula.ptg.Ptg;
import org.apache.poi.ss.formula.ptg.RefPtg;
/**
* Implementation for the Excel function IF
*
* Note that Excel is a bit picky about the arguments to this function,
* when serialised into {@link Ptg}s in a HSSF file. While most cases are
* pretty chilled about the R vs V state of {@link RefPtg} arguments,
* for IF special care is needed to avoid Excel showing #VALUE.
* See bug numbers #55324 and #55747 for the full details on this.
* TODO Fix this...
*/
public final class IfFunc extends Var2or3ArgFunction {
public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) {
boolean b;
try {
b = evaluateFirstArg(arg0, srcRowIndex, srcColumnIndex);
} catch (EvaluationException e) {
return e.getErrorEval();
}
if (b) {
if (arg1 == MissingArgEval.instance) {
return BlankEval.instance;
}
return arg1;
}
return BoolEval.FALSE;
}
public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1,
ValueEval arg2) {
boolean b;
try {
b = evaluateFirstArg(arg0, srcRowIndex, srcColumnIndex);
} catch (EvaluationException e) {
return e.getErrorEval();
}
if (b) {
if (arg1 == MissingArgEval.instance) {
return BlankEval.instance;
}
return arg1;
}
if (arg2 == MissingArgEval.instance) {
return BlankEval.instance;
}
return arg2;
}
public static boolean evaluateFirstArg(ValueEval arg, int srcCellRow, int srcCellCol)
throws EvaluationException {
ValueEval ve = OperandResolver.getSingleValue(arg, srcCellRow, srcCellCol);
Boolean b = OperandResolver.coerceValueToBoolean(ve, false);
if (b == null) {
return false;
}
return b.booleanValue();
}
}