org.lenskit.knn.item.model

Interface NeighborIterationStrategy

All Known Implementing Classes:

BasicNeighborIterationStrategy, SparseNeighborIterationStrategy

@DefaultProvider(value=DefaultNeighborIterationStrategyProvider.class)
public interface NeighborIterationStrategy

Abstraction of strategies for iterating over potential neighboring items. This is used by the item-item model builder to iterate over the potential neighbors of an item. It is abstracted so that different strategies can be used depending on the properties of the similarity function and data set.

Since:

2.1

Method Summary

Modifier and Type	Method and Description
LongIterator	neighborIterator(ItemItemBuildContext context, long item, boolean onlyAfter) Get an iterator over possible neighbors of an item.

Method Detail

neighborIterator

LongIterator neighborIterator(ItemItemBuildContext context,
                              long item,
                              boolean onlyAfter)

Get an iterator over possible neighbors of an item.

Parameters:

context - The build context (to get item & neighbor information).

item - The item ID. The item may or may not be included in the returned items.

onlyAfter - If true, only consider item IDs after item, because the caller only needs unique unordered pairs.

Returns:

An iterator over possible neighbors of item.