/*
* 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.
*/
/*
* Created on May 14, 2005
*
*/
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.ErrorEval;
import org.apache.poi.hssf.record.formula.eval.Eval;
import org.apache.poi.hssf.record.formula.eval.ValueEval;
import org.apache.poi.hssf.record.formula.eval.ValueEvalToNumericXlator;
/**
* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
*
*/
public abstract class NumericFunction implements Function {
protected static final double E = Math.E;
protected static final double PI = Math.PI;
private static final ValueEvalToNumericXlator DEFAULT_NUM_XLATOR =
new ValueEvalToNumericXlator((short) (
ValueEvalToNumericXlator.BOOL_IS_PARSED
| ValueEvalToNumericXlator.REF_BOOL_IS_PARSED
| ValueEvalToNumericXlator.EVALUATED_REF_BOOL_IS_PARSED
| ValueEvalToNumericXlator.STRING_IS_PARSED
| ValueEvalToNumericXlator.REF_STRING_IS_PARSED
| ValueEvalToNumericXlator.EVALUATED_REF_STRING_IS_PARSED
//| ValueEvalToNumericXlator.STRING_TO_BOOL_IS_PARSED
//| ValueEvalToNumericXlator.REF_STRING_TO_BOOL_IS_PARSED
//| ValueEvalToNumericXlator.STRING_IS_INVALID_VALUE
//| ValueEvalToNumericXlator.REF_STRING_IS_INVALID_VALUE
));
private static final int DEFAULT_MAX_NUM_OPERANDS = 30;
/**
* this is the default impl of the factory(ish) method getXlator.
* Subclasses can override this method
* if they desire to return a different ValueEvalToNumericXlator instance
* than the default.
*/
protected ValueEvalToNumericXlator getXlator() {
return DEFAULT_NUM_XLATOR;
}
protected ValueEval singleOperandEvaluate(Eval eval, int srcRow, short srcCol) {
ValueEval retval;
if (eval instanceof AreaEval) {
AreaEval ae = (AreaEval) eval;
if (ae.contains(srcRow, srcCol)) { // circular ref!
retval = ErrorEval.CIRCULAR_REF_ERROR;
}
else if (ae.isRow()) {
if (ae.containsColumn(srcCol)) {
ValueEval ve = ae.getValueAt(ae.getFirstRow(), srcCol);
ve = getXlator().attemptXlateToNumeric(ve);
retval = getXlator().attemptXlateToNumeric(ve);
}
else {
retval = ErrorEval.VALUE_INVALID;
}
}
else if (ae.isColumn()) {
if (ae.containsRow(srcRow)) {
ValueEval ve = ae.getValueAt(srcRow, ae.getFirstColumn());
retval = getXlator().attemptXlateToNumeric(ve);
}
else {
retval = ErrorEval.VALUE_INVALID;
}
}
else {
retval = ErrorEval.VALUE_INVALID;
}
}
else {
retval = getXlator().attemptXlateToNumeric((ValueEval) eval);
}
return retval;
}
}
|