fitnesse.util.partitioner

Class FunctionBasedListPartitioner<T>

java.lang.Object

fitnesse.util.partitioner.FunctionBasedListPartitioner<T>

Type Parameters:

T - list element type

All Implemented Interfaces:

ListPartitioner<T>

Direct Known Subclasses:

MapBasedListPartitioner

public class FunctionBasedListPartitioner<T>
extends java.lang.Object
implements ListPartitioner<T>

Splits a list into sublists based on two functions. One will give positions where a preference for a sublist is known beforehand, the o

Constructor Summary

Constructors

Constructor and Description
FunctionBasedListPartitioner(java.util.function.Function<T,java.util.Optional<java.lang.Integer>> positionFunction, java.util.function.BiFunction<java.util.List<java.util.List<T>>,java.util.List<T>,java.util.List<java.util.List<T>>> notFoundFunction) Creates new.

Method Summary

Modifier and Type	Method and Description
protected java.util.List<T>	addUsingPositionFunction(java.util.List<T> source, java.util.List<java.util.List<T>> result)
protected java.util.List<java.util.List<T>>	combinePlacedAndNotFound(java.util.List<java.util.List<T>> partitions, java.util.List<java.util.List<T>> extraItems)
java.util.List<java.util.List<T>>	split(java.util.List<T> source, int partitionCount) Splits source.

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionBasedListPartitioner

public FunctionBasedListPartitioner(java.util.function.Function<T,java.util.Optional<java.lang.Integer>> positionFunction,
                                    java.util.function.BiFunction<java.util.List<java.util.List<T>>,java.util.List<T>,java.util.List<java.util.List<T>>> notFoundFunction)

Creates new.

Parameters:

positionFunction - indicates sublist index for an element if it can be determined on its own

notFoundFunction - partitions the elements for which the positionFunction did not give an index, it gets the partitions created based on the positionFunctions and the elements not yet placed in a partition.

Method Detail

split

public java.util.List<java.util.List<T>> split(java.util.List<T> source,
                                               int partitionCount)

Description copied from interface: ListPartitioner

Splits source.

Specified by:

split in interface ListPartitioner<T>

Parameters:

source - list to split.

partitionCount - number of partitions to create.

Returns:

list of partitionCount lists each containing zero or more of source's elements.

addUsingPositionFunction

protected java.util.List<T> addUsingPositionFunction(java.util.List<T> source,
                                                     java.util.List<java.util.List<T>> result)

combinePlacedAndNotFound

protected java.util.List<java.util.List<T>> combinePlacedAndNotFound(java.util.List<java.util.List<T>> partitions,
                                                                     java.util.List<java.util.List<T>> extraItems)