78 lines
2.0 KiB
Java
78 lines
2.0 KiB
Java
package rules;
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/*
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SETTINGS: (please don't move this part)
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PATH=FractionsRule11
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*/
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import it.cavallium.warppi.math.Function;
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import it.cavallium.warppi.math.FunctionOperator;
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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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* Fractions rule
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* a / (b / c) = (a * c) / 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 FractionsRule11 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 "FractionsRule11";
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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.EXPANSION;
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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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boolean isExecutable = false;
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if (f instanceof Division) {
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final FunctionOperator fnc = (FunctionOperator) f;
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@SuppressWarnings("unused")
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Function a;
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@SuppressWarnings("unused")
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Function c;
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FunctionOperator div2;
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if (fnc.getParameter2() instanceof Division) {
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div2 = (FunctionOperator) fnc.getParameter2();
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a = fnc.getParameter1();
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c = div2.getParameter2();
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isExecutable = true;
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} else
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isExecutable = false;
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}
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if (isExecutable) {
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final ObjectArrayList<Function> result = new ObjectArrayList<>();
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final FunctionOperator fnc = (FunctionOperator) f;
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Function a;
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Function b;
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Function c;
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final FunctionOperator div2 = (FunctionOperator) fnc.getParameter2();
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a = fnc.getParameter1();
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b = div2.getParameter1();
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c = div2.getParameter2();
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result.add(new Division(fnc.getMathContext(), new Multiplication(fnc.getMathContext(), a, c), b));
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return result;
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} else
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return null;
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}
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}
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