68 lines
2.5 KiB
Java
68 lines
2.5 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.atp;
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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.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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import org.apache.poi.hssf.record.formula.functions.FreeRefFunction;
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import org.apache.poi.ss.formula.OperationEvaluationContext;
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/**
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* Implementation of Excel 'Analysis ToolPak' function ISEVEN() ISODD()<br/>
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*
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* @author Josh Micich
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*/
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final class ParityFunction implements FreeRefFunction {
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public static final FreeRefFunction IS_EVEN = new ParityFunction(0);
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public static final FreeRefFunction IS_ODD = new ParityFunction(1);
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private final int _desiredParity;
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private ParityFunction(int desiredParity) {
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_desiredParity = desiredParity;
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}
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public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
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if (args.length != 1) {
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return ErrorEval.VALUE_INVALID;
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}
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int val;
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try {
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val = evaluateArgParity(args[0], ec.getRowIndex(), ec.getColumnIndex());
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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(val == _desiredParity);
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}
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private static int evaluateArgParity(ValueEval arg, int srcCellRow, int srcCellCol) throws EvaluationException {
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ValueEval ve = OperandResolver.getSingleValue(arg, srcCellRow, (short)srcCellCol);
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double d = OperandResolver.coerceValueToDouble(ve);
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if (d < 0) {
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d = -d;
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}
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long v = (long) Math.floor(d);
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return (int) (v & 0x0001);
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}
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}
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