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package cn.nukkit.utils.functional;
import java.util.Objects;
import java.util.function.Function;
/**
* Represents a function that accepts three arguments and produces a result.
* This is the three-arity specialization of {@link Function}.
*
* This is a functional interface
* whose functional method is {@link #apply(Object, Object, Object)}.
*
* @param the type of the first argument to the function
* @param the type of the second argument to the function
* @param the type of the third argument to the function
* @param the type of the result of the function
*
* @see Function
* @since 1.4.0.0-PN
*/
@FunctionalInterface
public interface TriFunction {
/**
* Applies this function to the given arguments.
*
* @param f the first function argument
* @param s the second function argument
* @param t the third function argument
* @return the function result
*/
R apply(F f, S s, T t);
/**
* Returns a composed function that first applies this function to
* its input, and then applies the {@code after} function to the result.
* If evaluation of either function throws an exception, it is relayed to
* the caller of the composed function.
*
* @param the type of output of the {@code after} function, and of the
* composed function
* @param after the function to apply after this function is applied
* @return a composed function that first applies this function and then
* applies the {@code after} function
* @throws NullPointerException if after is null
*/
default TriFunction andThen(Function after) {
Objects.requireNonNull(after);
return (F f, S s, T t) -> after.apply(apply(f, s, t));
}
}