57 lines
1.6 KiB
Java
57 lines
1.6 KiB
Java
package rules;
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/*
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SETTINGS: (please don't move this part)
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PATH=FractionsRule8
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*/
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import it.cavallium.warppi.math.Function;
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import it.cavallium.warppi.math.MathContext;
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import it.cavallium.warppi.math.functions.Division;
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import it.cavallium.warppi.math.functions.Multiplication;
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import it.cavallium.warppi.math.rules.Rule;
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import it.cavallium.warppi.math.rules.RuleType;
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import it.unimi.dsi.fastutil.objects.ObjectArrayList;
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/**
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* Number rule
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* -a/-b = a/b
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*
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* @author Andrea Cavalli
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*
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*/
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public class FractionsRule8 implements Rule {
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// Rule name
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@Override
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public String getRuleName() {
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return "FractionsRule8";
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}
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// Rule type
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@Override
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public RuleType getRuleType() {
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return RuleType.CALCULATION;
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}
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/* Rule function
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Returns:
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- null if it's not executable on the function "f"
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- An ObjectArrayList<Function> if it did something
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*/
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@Override
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public ObjectArrayList<Function> execute(final Function f) {
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if (f instanceof Division) {
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final MathContext root = f.getMathContext();
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final Division div = (Division) f;
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if (div.getParameter1() instanceof Multiplication && ((Multiplication) div.getParameter1()).isNegative())
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if (div.getParameter2() instanceof Multiplication && ((Multiplication) div.getParameter2()).isNegative()) {
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final ObjectArrayList<Function> result = new ObjectArrayList<>();
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result.add(new Division(root, ((Multiplication) div.getParameter1()).toPositive(), ((Multiplication) div.getParameter2()).toPositive()));
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return result;
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}
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}
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return null;
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}
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}
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