Package Torello.Java.Function

Interface QuadConsumer<A,B,C,D>

Type Parameters:

A - The type of the first input-parameter.

B - The type of the second input-parameter.

C - The type of the third input-parameter.

D - The type of the last input-parameter.

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface QuadConsumer<A,B,C,D>

Function-Pointer Input: A, B, C, D Output: void.

This is an extension of Java's original functional-interfaces package. The Functional Interface designed here creates a "Quad Consumer" - a straight-forward extension of interface java.util.function.Consumer - but instead has an 'accept(...)' method receiving four variable-type parameters instead of just one.

NOTE: Java's Basic Package java.util.function.*, contains an interface named BiConsumer, that extends the basic Consumer<T> to interface BiConsumer<T, U>. The interface that is implemented here follows a similar vein, but extends the number of generic type-parameters to four, instead of two.

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Method Summary

@FunctionalInterface: (Lambda) Method
Modifier and Type	Method
void	accept(A a, B b, C c, D d)
Default Composition & Builder Method(s)
Modifier and Type	Method
default QuadConsumer<A,B,C,D>	andThen(QuadConsumer<? super A,? super B,? super C,? super D> after)

Method Detail

accept

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void accept(A a,
            B b,
            C c,
            D d)

Performs 'this' operation on the given arguments.

FunctionalInterface Target-Method:
This method corresponds to the @FunctionalInterface Annotation's method requirement. It is the only non-default, non-static method in this interface, and may be the target of a Lambda-Expression or '::' (double-colon) Function-Pointer.

Parameters:

a - the first input argument

b - the second input argument

c - the third input argument

d - the fourth input argument

andThen

🡅 ⇈ ⮫ 🗕 🗗 🗖

default QuadConsumer<A,B,C,D> andThen
            (QuadConsumer<? super A,? super B,? super C,? super D> after)

Returns a composed consumer that performs, in sequence, 'this' operation followed by the after operation. If performing either operation throws an exception, it is relayed to the caller of the composed operation. If performing this operation throws an exception, the 'after' operation will not be performed.

Parameters:

after - The operation to perform after this operation

Returns:

A composed consumer that performs in sequence 'this' operation followed by the 'after' operation.

Throws:

java.lang.NullPointerException - if parameter 'other' is null.

Code:

Exact Method Body:

 if (after == null)
     throw new NullPointerException("null has been passed to parameter 'after'");

 return (A a, B b, C c, D d) ->
 {
     this.accept(a, b, c, d);
     after.accept(a, b, c, d);
 };