50 lines
1.4 KiB
Java
50 lines
1.4 KiB
Java
package org.warp.picalculator.math.rules;
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import org.warp.picalculator.math.functions.Division;
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import org.warp.picalculator.math.functions.Number;
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import org.warp.picalculator.math.functions.Function;
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import org.warp.picalculator.math.functions.Power;
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import java.math.BigInteger;
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import java.util.ArrayList;
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import org.nevec.rjm.NumeroAvanzato;
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import org.nevec.rjm.NumeroAvanzatoVec;
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import org.warp.picalculator.Error;
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/**
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* Fractions rule<br>
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* <b>(a / b) ^ -c = (b / a) ^ c</b>
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* @author Andrea Cavalli
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*
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*/
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public class FractionsRule5 {
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public static boolean compare(Function f) throws Error {
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if (f instanceof Power) {
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Power fnc = (Power) f;
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if (fnc.getVariable1() instanceof Division && fnc.getVariable2() instanceof Number) {
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Number n2 = (Number) fnc.getVariable2();
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if (n2.getTerm().compareTo(new NumeroAvanzatoVec(NumeroAvanzato.ZERO)) < 0) {
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return true;
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}
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}
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}
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return false;
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}
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public static ArrayList<Function> execute(Function f) throws Error {
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ArrayList<Function> result = new ArrayList<>();
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Power fnc = (Power) f;
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Function a = ((Division)fnc.getVariable1()).getVariable1();
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Function b = ((Division)fnc.getVariable1()).getVariable2();
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Function c = ((Number)fnc.getVariable2()).multiply(new Number(null, "-1"));
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Division dv = new Division(null, b, a);
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Power pow = new Power(f.getParent(), dv, c);
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dv.setParent(pow);
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result.add(pow);
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return result;
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}
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}
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