mirror of https://github.com/DanilaFe/abacus
40 lines
1.2 KiB
Java
Executable File
40 lines
1.2 KiB
Java
Executable File
package org.nwapw.abacus.function;
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import org.nwapw.abacus.number.NumberInterface;
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/**
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* A function that operates on one or more
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* inputs and returns a single number.
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*/
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public abstract class Function {
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/**
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* Checks whether the given params will work for the given function.
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*
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* @param params the given params
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* @return true if the params can be used with this function.
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*/
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protected abstract boolean matchesParams(NumberInterface[] params);
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/**
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* Internal apply implementation, which already receives appropriately promoted
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* parameters that have bee run through matchesParams
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*
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* @param params the promoted parameters.
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* @return the return value of the function.
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*/
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protected abstract NumberInterface applyInternal(NumberInterface[] params);
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/**
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* Function to check, promote arguments and run the function.
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*
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* @param params the raw input parameters.
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* @return the return value of the function, or null if an error occurred.
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*/
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public NumberInterface apply(NumberInterface... params) {
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if (!matchesParams(params)) return null;
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return applyInternal(params);
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}
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}
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