com.bigdata.rdf.rules
Class FastClosure

java.lang.Object
  com.bigdata.rdf.rules.BaseClosure
      com.bigdata.rdf.rules.FastClosure

public class FastClosure
extends BaseClosure

Fast forward closure of the store based on "An approach to RDF(S) Query, Manipulation and Inference on Databases" by Lu, Yu, Tu, Lin, and Zhang.

Version:

$Id: FastClosure.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Field Summary

Fields inherited from class com.bigdata.rdf.rules.BaseClosure

db, forwardChainOwlEquivalentClass, forwardChainOwlEquivalentProperty, forwardChainOwlHasValue, forwardChainOwlInverseOf, forwardChainOwlSameAsClosure, forwardChainOwlSameAsProperties, forwardChainOwlTransitiveProperty, forwardChainRdfTypeRdfsResource, rdfsOnly, vocab

Constructor Summary

FastClosure(AbstractTripleStore db)

Method Summary

MappedProgram

getProgram(String db, String focusStore) Return the program that will be used to compute the closure of the database.

Methods inherited from class java.lang.Object

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

Constructor Detail

FastClosure

public FastClosure(AbstractTripleStore db)

Method Detail

getProgram

public MappedProgram getProgram(String db,
                                String focusStore)

Description copied from class: BaseClosure

Return the program that will be used to compute the closure of the database.

Specified by:

getProgram in class BaseClosure

Parameters:

db - The database whose closure will be updated.

focusStore - When non-null, the focusStore will be closed against the database with the entailments written into the database. When null, the entire database will be closed (database-at-once closure).

Returns:

The program to be executed.