52 lines
2.1 KiB
Java
52 lines
2.1 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.record.formula.functions;
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import org.apache.poi.hssf.record.formula.eval.BoolEval;
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import org.apache.poi.hssf.record.formula.eval.ErrorEval;
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import org.apache.poi.hssf.record.formula.eval.Eval;
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import org.apache.poi.hssf.record.formula.eval.EvaluationException;
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import org.apache.poi.hssf.record.formula.eval.OperandResolver;
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import org.apache.poi.hssf.record.formula.eval.ValueEval;
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/**
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* @author Amol S. Deshmukh < amol at apache dot org >
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* The NOT boolean function. Returns negation of specified value
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* (treated as a boolean). If the specified arg is a number,
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* then it is true <=> 'number is non-zero'
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*/
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public final class Not implements Function {
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public Eval evaluate(Eval[] args, int srcCellRow, short srcCellCol) {
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if (args.length != 1) {
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return ErrorEval.VALUE_INVALID;
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}
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boolean boolArgVal;
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try {
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ValueEval ve = OperandResolver.getSingleValue(args[0], srcCellRow, srcCellCol);
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Boolean b = OperandResolver.coerceValueToBoolean(ve, false);
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boolArgVal = b == null ? false : b.booleanValue();
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} catch (EvaluationException e) {
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return e.getErrorEval();
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}
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return BoolEval.valueOf(!boolArgVal);
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}
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}
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