52 lines
1.8 KiB
Java
52 lines
1.8 KiB
Java
package org.warp.commonutils.functional;
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import java.util.Objects;
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import java.util.function.Function;
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/**
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* Represents a function that accepts three arguments and produces a result.
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* This is the three-arity specialization of {@link Function}.
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*
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* <p>This is a <a href="package-summary.html">functional interface</a>
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* whose functional method is {@link #apply(Object, Object, Object)}.
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*
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* @param <T> the type of the first argument to the function
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* @param <U> the type of the second argument to the function
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* @param <X> the type of the third argument to the function
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* @param <R> the type of the result of the function
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*
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* @see Function
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* @since 1.8
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*/
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@FunctionalInterface
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public interface TriFunction<T, U, X, R> {
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/**
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* Applies this function to the given arguments.
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*
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* @param t the first function argument
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* @param u the second function argument
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* @param x the third function argument
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* @return the function result
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*/
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R apply(T t, U u, X x);
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/**
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* Returns a composed function that first applies this function to
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* its input, and then applies the {@code after} function to the result.
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* If evaluation of either function throws an exception, it is relayed to
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* the caller of the composed function.
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*
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* @param <V> the type of output of the {@code after} function, and of the
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* composed function
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* @param after the function to apply after this function is applied
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* @return a composed function that first applies this function and then
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* applies the {@code after} function
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* @throws NullPointerException if after is null
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*/
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default <V> org.warp.commonutils.functional.TriFunction<T, U, X, V> andThen(Function<? super R, ? extends V> after) {
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Objects.requireNonNull(after);
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return (T t, U u, X x) -> after.apply(apply(t, u, x));
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}
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}
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