65 lines
1.6 KiB
Java
65 lines
1.6 KiB
Java
package rules;
|
|
/*
|
|
SETTINGS: (please don't move this part)
|
|
PATH=FractionsRule6
|
|
*/
|
|
|
|
import it.cavallium.warppi.math.Function;
|
|
import it.cavallium.warppi.math.MathContext;
|
|
import it.cavallium.warppi.math.functions.Division;
|
|
import it.cavallium.warppi.math.functions.Number;
|
|
import it.cavallium.warppi.math.functions.Power;
|
|
import it.cavallium.warppi.math.rules.Rule;
|
|
import it.cavallium.warppi.math.rules.RuleType;
|
|
import it.unimi.dsi.fastutil.objects.ObjectArrayList;
|
|
|
|
/**
|
|
* Number rule
|
|
* a ^ -1 = 1/a
|
|
*
|
|
* @author Andrea Cavalli
|
|
*
|
|
*/
|
|
public class FractionsRule6 implements Rule {
|
|
// Rule name
|
|
@Override
|
|
public String getRuleName() {
|
|
return "FractionsRule6";
|
|
}
|
|
|
|
// Rule type
|
|
@Override
|
|
public RuleType getRuleType() {
|
|
return RuleType.EXPANSION;
|
|
}
|
|
|
|
/* Rule function
|
|
Returns:
|
|
- null if it's not executable on the function "f"
|
|
- An ObjectArrayList<Function> if it did something
|
|
*/
|
|
|
|
@Override
|
|
public ObjectArrayList<Function> execute(final Function f) {
|
|
boolean isExecutable = false;
|
|
if (f instanceof Power) {
|
|
final MathContext root = f.getMathContext();
|
|
final Power pow = (Power) f;
|
|
if (pow.getParameter2() instanceof Number) {
|
|
final Function numb = pow.getParameter2();
|
|
if (numb.equals(new Number(root, -1)))
|
|
isExecutable = true;
|
|
}
|
|
}
|
|
|
|
if (isExecutable) {
|
|
final MathContext root = f.getMathContext();
|
|
final ObjectArrayList<Function> result = new ObjectArrayList<>();
|
|
final Function a = new Division(root, new Number(root, 1), ((Power) f).getParameter1());
|
|
result.add(a);
|
|
return result;
|
|
} else
|
|
return null;
|
|
}
|
|
}
|