com.bigdata.rdf.rules
Class BaseClosure

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

Direct Known Subclasses:

FastClosure, FullClosure

public abstract class BaseClosure
extends Object

Base class for classes that provide closure programs.

Version:

$Id: BaseClosure.java 6031 2012-02-16 08:43:46Z mrpersonick $

Author:

Bryan Thompson

Field Summary

protected AbstractTripleStore	db The database whose configuration will determine which entailments are to be maintained and which of those entailments are computed by forward closure vs backchained.
protected boolean	forwardChainOwlEquivalentClass
protected boolean	forwardChainOwlEquivalentProperty
protected boolean	forwardChainOwlHasValue
protected boolean	forwardChainOwlInverseOf
protected boolean	forwardChainOwlSameAsClosure
protected boolean	forwardChainOwlSameAsProperties
protected boolean	forwardChainOwlSymmetricProperty
protected boolean	forwardChainOwlTransitiveProperty
protected boolean	forwardChainRdfTypeRdfsResource
protected boolean	rdfsOnly
protected Vocabulary	vocab Various term identifiers that we need to construct the rules.

Constructor Summary

protected

BaseClosure(AbstractTripleStore db)

Method Summary

protected List<Rule>	getCustomRules(String database) Allow subclasses of the fast and full closure programs to provide a set of custom rules that will be run towards the end of the standard closure program.
abstract MappedProgram	getProgram(String database, 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

Field Detail

db

protected final AbstractTripleStore db

The database whose configuration will determine which entailments are to be maintained and which of those entailments are computed by forward closure vs backchained.

rdfsOnly

protected final boolean rdfsOnly

forwardChainRdfTypeRdfsResource

protected final boolean forwardChainRdfTypeRdfsResource

forwardChainOwlSameAsClosure

protected final boolean forwardChainOwlSameAsClosure

forwardChainOwlSameAsProperties

protected final boolean forwardChainOwlSameAsProperties

forwardChainOwlEquivalentProperty

protected final boolean forwardChainOwlEquivalentProperty

forwardChainOwlEquivalentClass

protected final boolean forwardChainOwlEquivalentClass

forwardChainOwlTransitiveProperty

protected final boolean forwardChainOwlTransitiveProperty

forwardChainOwlInverseOf

protected final boolean forwardChainOwlInverseOf

forwardChainOwlHasValue

protected final boolean forwardChainOwlHasValue

forwardChainOwlSymmetricProperty

protected final boolean forwardChainOwlSymmetricProperty

vocab

protected final Vocabulary vocab

Various term identifiers that we need to construct the rules.

Constructor Detail

BaseClosure

protected BaseClosure(AbstractTripleStore db)

Parameters:

db - The database whose configuration will determine which entailments are to be maintained and which of those entailments are computed by forward closure vs backchained.

Throws:

IllegalArgumentException - if the db is null.

Method Detail

getProgram

public abstract MappedProgram getProgram(String database,
                                         String focusStore)

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

Parameters:

database - 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.

TODO:

the returned program can be cached for a given database and focusStore (or for the database if no focusStore is used).

getCustomRules

protected List<Rule> getCustomRules(String database)

Allow subclasses of the fast and full closure programs to provide a set of custom rules that will be run towards the end of the standard closure program.