/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.hssf.record.formula.functions;
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.EvaluationException;
import org.apache.poi.hssf.record.formula.eval.OperandResolver;
import org.apache.poi.hssf.record.formula.eval.ValueEval;
/**
* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
*
*/
public final class If implements Function {
public Eval evaluate(Eval[] args, int srcCellRow, short srcCellCol) {
Eval falseResult;
switch (args.length) {
case 3:
falseResult = args[2];
break;
case 2:
falseResult = BoolEval.FALSE;
break;
default:
return ErrorEval.VALUE_INVALID;
}
boolean b;
try {
b = evaluateFirstArg(args[0], srcCellRow, srcCellCol);
} catch (EvaluationException e) {
return e.getErrorEval();
}
if (b) {
return args[1];
}
return falseResult;
}
private static boolean evaluateFirstArg(Eval arg, int srcCellRow, short srcCellCol)
throws EvaluationException {
ValueEval ve = OperandResolver.getSingleValue(arg, srcCellRow, srcCellCol);
Boolean b = OperandResolver.coerceValueToBoolean(ve, false);
if (b == null) {
return false;
}
return b.booleanValue();
}
}