67 lines
1.5 KiB
Java
67 lines
1.5 KiB
Java
/*
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SETTINGS: (please don't move this part)
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PATH=FractionsRule2
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*/
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//Imports
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import org.warp.picalculator.Error;
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import org.warp.picalculator.math.Function;
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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.rules.Rule;
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import org.warp.picalculator.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 / 1 = a
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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 FractionsRule2 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 "FractionsRule2";
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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(Function f) {
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boolean isExecutable = false;
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if (f instanceof Division) {
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Division fnc = (Division) f;
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if (fnc.getParameter2() instanceof Number) {
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Number numb = (Number) fnc.getParameter2();
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if (numb.equals(new Number(f.getMathContext(), 1))) {
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isExecutable = true;
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}
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}
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}
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if (isExecutable) {
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ObjectArrayList<Function> result = new ObjectArrayList<>();
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Division fnc = (Division) f;
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result.add(fnc.getParameter1());
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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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}
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