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implemented the NOT boolean function

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git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@353725 13f79535-47bb-0310-9956-ffa450edef68
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Amol S. Deshmukh 2005-06-22 20:46:55 +00:00
parent 6c938f3c8a
commit 840c73af40
1 changed files with 97 additions and 4 deletions
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99
src/scratchpad/src/org/apache/poi/hssf/record/formula/functions/Not.java
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@ -4,11 +4,104 @@
*/ */
package org.apache.poi.hssf.record.formula.functions; package org.apache.poi.hssf.record.formula.functions;
import org.apache.poi.hssf.record.formula.eval.AreaEval;
import org.apache.poi.hssf.record.formula.eval.BlankEval;
import org.apache.poi.hssf.record.formula.eval.BoolEval;
import org.apache.poi.hssf.record.formula.eval.ErrorEval;
import org.apache.poi.hssf.record.formula.eval.Eval;
import org.apache.poi.hssf.record.formula.eval.NumberEval;
import org.apache.poi.hssf.record.formula.eval.RefEval;
import org.apache.poi.hssf.record.formula.eval.StringEval;
import org.apache.poi.hssf.record.formula.eval.ValueEval;
/** /**
* @author * @author Amol S. Deshmukh < amol at apache dot org >
* * The NOT boolean function. Returns negation of specified value
* (treated as a boolean). If the specified arg is a number,
* then it is true <=> 'number is non-zero'
*/ */
public class Not extends DefaultFunctionImpl { public class Not extends BooleanFunction {
public Eval evaluate(Eval[] operands, int srcRow, short srcCol) {
ValueEval retval = null;
boolean b = true;
ValueEval tempVe = null;
switch (operands.length) {
default:
retval = ErrorEval.VALUE_INVALID;
break;
case 1:
if (operands[0] instanceof AreaEval) {
AreaEval ae = (AreaEval) operands[0];
if (ae.isRow() && ae.containsColumn(srcCol)) {
ValueEval ve = ae.getValueAt(ae.getFirstRow(), srcCol);
tempVe = singleOperandEvaluate(ve);
} else if (ae.isColumn() && ae.containsRow(srcRow)) {
ValueEval ve = ae.getValueAt(srcRow, ae.getFirstColumn());
tempVe = singleOperandEvaluate(ve);
} else {
retval = ErrorEval.VALUE_INVALID;
}
}
else {
tempVe = singleOperandEvaluate(operands[0]);
if (tempVe instanceof StringEval) {
retval = ErrorEval.VALUE_INVALID;
}
else if (tempVe instanceof ErrorEval) {
retval = tempVe;
}
}
}
if (retval == null) { // if no error
if (tempVe instanceof BoolEval) {
b = b && ((BoolEval) tempVe).getBooleanValue();
}
else if (tempVe instanceof StringEval) {
retval = ErrorEval.VALUE_INVALID;
}
else if (tempVe instanceof ErrorEval) {
retval = tempVe;
}
retval = b ? BoolEval.FALSE : BoolEval.TRUE;
}
return retval;
}
protected ValueEval singleOperandEvaluate(Eval ve) {
ValueEval retval = ErrorEval.VALUE_INVALID;
if (ve instanceof RefEval) {
RefEval re = (RefEval) ve;
retval = singleOperandEvaluate(re.getInnerValueEval());
}
else if (ve instanceof BoolEval) {
retval = (BoolEval) ve;
}
else if (ve instanceof NumberEval) {
NumberEval ne = (NumberEval) ve;
retval = ne.getNumberValue() != 0 ? BoolEval.TRUE : BoolEval.FALSE;
}
else if (ve instanceof StringEval) {
StringEval se = (StringEval) ve;
String str = se.getStringValue();
retval = str.equalsIgnoreCase("true")
? BoolEval.TRUE
: str.equalsIgnoreCase("false")
? BoolEval.FALSE
: (ValueEval) ErrorEval.VALUE_INVALID;
}
else if (ve instanceof BlankEval) {
retval = BoolEval.FALSE;
}
else {
retval = ErrorEval.VALUE_INVALID;
}
return retval;
}
} }