com.cognitect.transducers

Class AReducingFunctionOn<R,A,B>

java.lang.Object

com.cognitect.transducers.AReducingFunctionOn<R,A,B>

Type Parameters:

R - Type of first argument and return value of the reducing functions

A - Input type of reducing function being chained to

B - Input type of this reducing function

All Implemented Interfaces:

IReducingFunction<R,B>, IStepFunction<R,B>

public abstract class AReducingFunctionOn<R,A,B>
extends Object
implements IReducingFunction<R,B>

Abstract base class for implementing a reducing function that chains to another reducing function. Zero-arity and single-arity overloads of apply delegate to the chained reducing function. Derived classes must implement the three-arity overload of apply, and may implement either of the other two overloads as required.

Field Summary

Fields

Modifier and Type	Field and Description
protected IReducingFunction<R,? super A>	rf

Constructor Summary

Constructors

Constructor and Description
AReducingFunctionOn(IReducingFunction<R,? super A> rf) Constructs a reducing function that chains to the given reducing function.

Method Summary

Methods

Modifier and Type	Method and Description
R	apply() Forwards to chained reducing function.
R	apply(R result) Forwards to chained reducing function.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.cognitect.transducers.IStepFunction

apply

Field Detail

rf

protected IReducingFunction<R,? super A> rf

Constructor Detail

AReducingFunctionOn

public AReducingFunctionOn(IReducingFunction<R,? super A> rf)

Constructs a reducing function that chains to the given reducing function.

Parameters:

rf - a reducing function to chain to

Method Detail

apply

public R apply()

Forwards to chained reducing function.

Specified by:

apply in interface IReducingFunction<R,B>

Returns:

a new result

apply

public R apply(R result)

Forwards to chained reducing function.

Specified by:

apply in interface IReducingFunction<R,B>

Parameters:

result - The final reduction result

Returns:

the completed result