org.apache.jena.reasoner.transitiveReasoner

Class TransitiveInfGraph

java.lang.Object

org.apache.jena.graph.impl.GraphBase

org.apache.jena.reasoner.BaseInfGraph

org.apache.jena.reasoner.transitiveReasoner.TransitiveInfGraph

All Implemented Interfaces:

Graph, GraphWithPerform, InfGraph

public class TransitiveInfGraph
extends BaseInfGraph

Implementation of InfGraph used by the TransitiveReasoner. This is returned by the TransitiveReasoner when a data graph (together with an optional schema) has been bound.

The cached property and class graphs are calculated by the reasoner when the schema is bound. If the data graph does not include schema information then the caches generated at schema binding stage are reused here. Otherwise the caches are regenerated.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.jena.reasoner.BaseInfGraph

BaseInfGraph.InfCapabilities, BaseInfGraph.InfFindSafeCapabilities, BaseInfGraph.InfTransactionHandler

Field Summary

Fields inherited from class org.apache.jena.graph.impl.GraphBase

TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

Fields inherited from interface org.apache.jena.graph.Graph

emptyGraph

Constructor Summary

Constructors

Constructor and Description
TransitiveInfGraph(Graph data, TransitiveReasoner reasoner) Constructor.

Method Summary

Modifier and Type	Method and Description
ExtendedIterator<Triple>	find(TriplePattern pattern) Basic pattern lookup interface.
ExtendedIterator<Triple>	findWithContinuation(TriplePattern pattern, Finder continuation) Extended find interface used in situations where the implementator may or may not be able to answer the complete query.
Capabilities	getCapabilities() Answer the InfCapabilities of this InfGraph.
Graph	getSchemaGraph() Return the schema graph, if any, bound into this inference graph.
ExtendedIterator<Triple>	graphBaseFind(Node subject, Node property, Node object) Returns an iterator over Triples.
void	performAdd(Triple t) Add one triple to the data graph, run any rules triggered by the new data item, recursively adding any generated triples.
void	performDelete(Triple t) Removes the triple t (if possible) from the set belonging to this graph.
void	prepare() Perform any initial processing and caching.

Methods inherited from class org.apache.jena.reasoner.BaseInfGraph

clear, cloneWithPremises, close, find, getDeductionsGraph, getDerivation, getGlobalProperty, getPrefixMapping, getRawGraph, getReasoner, getTransactionHandler, getVersion, graphBaseSize, isEmpty, isPrepared, rebind, rebind, remove, reset, setDerivationLogging, testGlobalProperty, validate

Methods inherited from class org.apache.jena.graph.impl.GraphBase

add, contains, contains, delete, dependsOn, find, find, forTestingOnly_graphBaseFind, getEventManager, getStatisticsHandler, isClosed, isIsomorphicWith, notifyAdd, notifyDelete, size, toString, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.jena.graph.Graph

add, contains, contains, delete, dependsOn, find, find, find, getEventManager, getStatisticsHandler, isClosed, isIsomorphicWith, size

Constructor Detail

TransitiveInfGraph

public TransitiveInfGraph(Graph data,
                          TransitiveReasoner reasoner)

Constructor. Called by the TransitiveReasoner when it is bound to a data graph.

Parameters:

reasoner - the parent instance of the transitive reasoner, including any precomputed class and property caches

data - the data graph being bound in.

Method Detail

prepare

public void prepare()

Perform any initial processing and caching. This call is optional. Most engines either have negligable set up work or will perform an implicit "prepare" if necessary. The call is provided for those occasions where substantial preparation work is possible (e.g. running a forward chaining rule system) and where an application might wish greater control over when this prepration is done.

Specified by:

prepare in interface InfGraph

Overrides:

prepare in class BaseInfGraph

getSchemaGraph

public Graph getSchemaGraph()

Return the schema graph, if any, bound into this inference graph.

Specified by:

getSchemaGraph in class BaseInfGraph

findWithContinuation

public ExtendedIterator<Triple> findWithContinuation(TriplePattern pattern,
                                                     Finder continuation)

Extended find interface used in situations where the implementator may or may not be able to answer the complete query. It will attempt to answer the pattern but if its answers are not known to be complete then it will also pass the request on to the nested Finder to append more results.

Specified by:

findWithContinuation in class BaseInfGraph

Parameters:

pattern - a TriplePattern to be matched against the data

continuation - either a Finder or a normal Graph which will be asked for additional match results if the implementor may not have completely satisfied the query.

graphBaseFind

public ExtendedIterator<Triple> graphBaseFind(Node subject,
                                              Node property,
                                              Node object)

Returns an iterator over Triples.

find

public ExtendedIterator<Triple> find(TriplePattern pattern)

Basic pattern lookup interface.

Overrides:

find in class BaseInfGraph

Parameters:

pattern - a TriplePattern to be matched against the data

Returns:

a ExtendedIterator over all Triples in the data set that match the pattern

performAdd

public void performAdd(Triple t)

Add one triple to the data graph, run any rules triggered by the new data item, recursively adding any generated triples.

Specified by:

performAdd in interface GraphWithPerform

Overrides:

performAdd in class BaseInfGraph

performDelete

public void performDelete(Triple t)

Removes the triple t (if possible) from the set belonging to this graph.

Specified by:

performDelete in interface GraphWithPerform

Overrides:

performDelete in class BaseInfGraph

getCapabilities

public Capabilities getCapabilities()

Answer the InfCapabilities of this InfGraph.

Specified by:

getCapabilities in interface Graph

Overrides:

getCapabilities in class BaseInfGraph