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package com.github.tadukoo.util.functional.function;

/**
 * A function that takes four arguments, returns a result,
 * and may throw a {@link Throwable}.
 *
 * @param  The 1st input argument type for the function
 * @param  The 2nd input argument type for the function
 * @param  The 3rd input argument type for the function
 * @param  The 4th input argument type for the function
 * @param  The output result type for the function
 * @param  The type of {@link Throwable} thrown by the function
 * 
 * @author Logan Ferree (Tadukoo)
 * @version 0.1-Alpha-SNAPSHOT
 */
@FunctionalInterface
public interface ThrowingFunction4{
	
	/**
	 * Takes four arguments and returns a result.
	 * 
	 * @param a The 1st argument
	 * @param b The 2nd argument
	 * @param c The 3rd argument
	 * @param d The 4th argument
	 * @return A result
	 * @throws T Determined by the function, not required
	 */
	R apply(A a, B b, C c, D d) throws T;
	
	/**
	 * Creates a ThrowingFunction3 that runs this ThrowingFunction4 and
	 * puts the result into the given {@link ThrowingFunction}.
	 * 
	 * @param  The output type of the {@link ThrowingFunction}
	 * @param after A {@link ThrowingFunction} to put the result of this ThrowingFunction4 into
	 * @return The ThrowingFunction4 made from composing this one and the given {@link ThrowingFunction}
	 */
	default  ThrowingFunction4 andThen(ThrowingFunction after){
		return (a, b, c, d) -> after.apply(this.apply(a, b, c, d));
	}
}