Package org.apache.lucene.facet.index.categorypolicy

Policies for indexing categories

See:
Description

Interface Summary

OrdinalPolicy	Filtering category ordinals in CategoryParentsStream, where a given category ordinal is added to the stream, and than its parents are being added one after the other using TaxonomyWriter.getParent(int).
PathPolicy	Filtering category paths in CategoryParentsStream, where a given category is added to the stream, and than all its parents are being added one after the other by successively removing the last component.

Class Summary

DefaultOrdinalPolicy	This class filters our the ROOT category ID.
DefaultPathPolicy	This class filters our the ROOT category path.
NonTopLevelOrdinalPolicy	Filter out any "top level" category ordinals.
NonTopLevelPathPolicy	This class filters our the ROOT category, and it's direct descendants.

Package org.apache.lucene.facet.index.categorypolicy Description

Policies for indexing categories

There are two kinds of policies:

• Path policies are based on the path of the category.
• Ordinal policies are based on the ordinal of the category.

Policies are "consulted" with during indexing, for deciding whether a category should be added to the index or not. The two kinds of policies can be used for different purposes. For example, path policies dictates which categories can participate in a drill-down operation, while ordinal policies affect which can be accumulated (e.g. counted).