| /* ==================================================================== |
| 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.ss.formula.eval; |
| |
| import org.apache.poi.ss.formula.functions.Fixed2ArgFunction; |
| import org.apache.poi.ss.formula.functions.Function; |
| |
| /** |
| * @author Josh Micich |
| */ |
| public abstract class TwoOperandNumericOperation extends Fixed2ArgFunction { |
| |
| protected final double singleOperandEvaluate(ValueEval arg, int srcCellRow, int srcCellCol) throws EvaluationException { |
| ValueEval ve = OperandResolver.getSingleValue(arg, srcCellRow, srcCellCol); |
| return OperandResolver.coerceValueToDouble(ve); |
| } |
| public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) { |
| double result; |
| try { |
| double d0 = singleOperandEvaluate(arg0, srcRowIndex, srcColumnIndex); |
| double d1 = singleOperandEvaluate(arg1, srcRowIndex, srcColumnIndex); |
| result = evaluate(d0, d1); |
| if (result == 0.0) { // this '==' matches +0.0 and -0.0 |
| // Excel converts -0.0 to +0.0 for '*', '/', '%', '+' and '^' |
| if (!(this instanceof SubtractEvalClass)) { |
| return NumberEval.ZERO; |
| } |
| } |
| if (Double.isNaN(result) || Double.isInfinite(result)) { |
| return ErrorEval.NUM_ERROR; |
| } |
| } catch (EvaluationException e) { |
| return e.getErrorEval(); |
| } |
| return new NumberEval(result); |
| } |
| |
| protected abstract double evaluate(double d0, double d1) throws EvaluationException; |
| |
| public static final Function AddEval = new TwoOperandNumericOperation() { |
| protected double evaluate(double d0, double d1) { |
| return d0+d1; |
| } |
| }; |
| public static final Function DivideEval = new TwoOperandNumericOperation() { |
| protected double evaluate(double d0, double d1) throws EvaluationException { |
| if (d1 == 0.0) { |
| throw new EvaluationException(ErrorEval.DIV_ZERO); |
| } |
| return d0/d1; |
| } |
| }; |
| public static final Function MultiplyEval = new TwoOperandNumericOperation() { |
| protected double evaluate(double d0, double d1) { |
| return d0*d1; |
| } |
| }; |
| public static final Function PowerEval = new TwoOperandNumericOperation() { |
| protected double evaluate(double d0, double d1) { |
| return Math.pow(d0, d1); |
| } |
| }; |
| private static final class SubtractEvalClass extends TwoOperandNumericOperation { |
| public SubtractEvalClass() { |
| // |
| } |
| protected double evaluate(double d0, double d1) { |
| return d0-d1; |
| } |
| } |
| public static final Function SubtractEval = new SubtractEvalClass(); |
| } |