com.cognitect.transducers

Class AReducingFunction<R,T>

java.lang.Object

com.cognitect.transducers.AReducingFunction<R,T>

Type Parameters:

R - Type of first argument and return value

T - Type of input to reduce

All Implemented Interfaces:

IReducingFunction<R,T>, IStepFunction<R,T>

public abstract class AReducingFunction<R,T>
extends Object
implements IReducingFunction<R,T>

Abstract base class for implementing a reducing function. Zero-arity overload of apply used for initialization throws an exception if called. Single-arity overload of apply used for completing reduction is the identity function. Derived classes must implement the three-arity overload of apply, and may implement either of the other two overloads as required.

Constructor Summary

Constructors

Constructor and Description
AReducingFunction()

Method Summary

Methods

Modifier and Type	Method and Description
R	apply() Throws IllegalStateException.
R	apply(R result) Returns the given result without alteration.

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

Constructor Detail

AReducingFunction

public AReducingFunction()

Method Detail

apply

public R apply()

Throws IllegalStateException.

Specified by:

apply in interface IReducingFunction<R,T>

Returns:

apply

public R apply(R result)

Returns the given result without alteration.

Specified by:

apply in interface IReducingFunction<R,T>

Parameters:

result - The final reduction result

Returns: