Class TransitiveReasoner
- java.lang.Object
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- org.apache.jena.reasoner.transitiveReasoner.TransitiveReasoner
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- All Implemented Interfaces:
Reasoner
public class TransitiveReasoner extends java.lang.Object implements Reasoner
A simple "reasoner" used to help with API development.This reasoner caches a transitive closure of the subClass and subProperty graphs. The generated infGraph allows both the direct and closed versions of these properties to be retrieved. The cache is built when the tbox is bound in but if the final data graph contains additional subProperty/subClass declarations then the cache has to be rebuilt.
The triples in the tbox (if present) will also be included in any query. Any of tbox or data graph are allowed to be null.
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Field Summary
Fields Modifier and Type Field Description static Node
directSubClassOf
The direct (minimal) version of the subClassOf propertystatic Node
directSubPropertyOf
The direct (minimal) version of the subPropertyOf propertystatic Node
subClassOf
The normal subClassOf propertystatic Node
subPropertyOf
The normal subPropertyOf property
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Constructor Summary
Constructors Constructor Description TransitiveReasoner()
Constructor
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addDescription(Model configSpec, Resource base)
Add a configuration description for this reasoner into a partial configuration specification model.InfGraph
bind(Graph data)
Attach the reasoner to a set of RDF ddata to process.Reasoner
bindSchema(Graph tbox)
Extracts all of the subClass and subProperty declarations from the given schema/tbox and caches the resultant graphs.Reasoner
bindSchema(Model tbox)
Extracts all of the subClass and subProperty declarations from the given schema/tbox and caches the resultant graphs.Capabilities
getGraphCapabilities()
Return the Jena Graph Capabilties that the inference graphs generated by this reasoner are expected to conform to.Model
getReasonerCapabilities()
Return a description of the capabilities of this reasoner encoded in RDF.TransitiveGraphCache
getSubClassCache()
Accessor used during infgraph construction - return the cached version of the subClass lattice.TransitiveGraphCache
getSubPropertyCache()
Accessor used during infgraph construction - return the cached version of the subProperty lattice.Finder
getTbox()
Accessor used during infgraph construction - return the partially bound tbox, if any.void
setDerivationLogging(boolean logOn)
Switch on/off drivation logging.void
setParameter(Property parameter, java.lang.Object value)
Set a configuration paramter for the reasoner.boolean
supportsProperty(Property property)
Determine whether the given property is recognized and treated specially by this reasoner.
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Field Detail
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directSubPropertyOf
public static final Node directSubPropertyOf
The direct (minimal) version of the subPropertyOf property
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directSubClassOf
public static final Node directSubClassOf
The direct (minimal) version of the subClassOf property
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subPropertyOf
public static final Node subPropertyOf
The normal subPropertyOf property
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subClassOf
public static final Node subClassOf
The normal subClassOf property
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Method Detail
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getReasonerCapabilities
public Model getReasonerCapabilities()
Return a description of the capabilities of this reasoner encoded in RDF. These capabilities may be static or may depend on configuration information supplied at construction time. May be null if there are no useful capabilities registered.- Specified by:
getReasonerCapabilities
in interfaceReasoner
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addDescription
public void addDescription(Model configSpec, Resource base)
Add a configuration description for this reasoner into a partial configuration specification model.- Specified by:
addDescription
in interfaceReasoner
- Parameters:
configSpec
- a Model into which the configuration information should be placedbase
- the Resource to which the configuration parameters should be added.
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supportsProperty
public boolean supportsProperty(Property property)
Determine whether the given property is recognized and treated specially by this reasoner. This is a convenience packaging of a special case of getCapabilities.- Specified by:
supportsProperty
in interfaceReasoner
- Parameters:
property
- the property which we want to ask the reasoner about, given as a Node since this is part of the SPI rather than API- Returns:
- true if the given property is handled specially by the reasoner.
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bindSchema
public Reasoner bindSchema(Graph tbox) throws ReasonerException
Extracts all of the subClass and subProperty declarations from the given schema/tbox and caches the resultant graphs. It can only be used once, can't stack up multiple tboxes this way. This limitation could be lifted - the only difficulty is the need to reprocess all the earlier tboxes if a new subPropertyOf subPropertyOf subClassOf is discovered.- Specified by:
bindSchema
in interfaceReasoner
- Parameters:
tbox
- schema containing the property and class declarations- Returns:
- a reasoner instace which can be used to process a data graph
- Throws:
ReasonerException
- if the reasoner cannot be bound to a rule set in this way, for example if the underlying engine can only accept a single rule set in this way and one rule set has already been bound in of if the ruleset is illformed.
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bindSchema
public Reasoner bindSchema(Model tbox) throws ReasonerException
Extracts all of the subClass and subProperty declarations from the given schema/tbox and caches the resultant graphs. It can only be used once, can't stack up multiple tboxes this way. This limitation could be lifted - the only difficulty is the need to reprocess all the earlier tboxes if a new subPropertyOf subPropertyOf subClassOf is discovered.- Specified by:
bindSchema
in interfaceReasoner
- Parameters:
tbox
- schema containing the property and class declarations- Returns:
- a reasoner instace which can be used to process a data graph
- Throws:
ReasonerException
- if the reasoner cannot be bound to a rule set in this way, for example if the underlying engine can only accept a single rule set in this way and one rule set has already been bound in of if the ruleset is illformed.
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bind
public InfGraph bind(Graph data) throws ReasonerException
Attach the reasoner to a set of RDF ddata to process. The reasoner may already have been bound to specific rules or ontology axioms (encoded in RDF) through earlier bindRuleset calls.- Specified by:
bind
in interfaceReasoner
- Parameters:
data
- the RDF data to be processed, some reasoners may restrict the range of RDF which is legal here (e.g. syntactic restrictions in OWL).- Returns:
- an inference graph through which the data+reasoner can be queried.
- Throws:
ReasonerException
- if the data is ill-formed according to the constraints imposed by this reasoner.
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setDerivationLogging
public void setDerivationLogging(boolean logOn)
Switch on/off drivation logging. If set to true then the InfGraph created from the bind operation will start life with recording of derivations switched on. This is currently only of relevance to rule-based reasoners.Default - false.
- Specified by:
setDerivationLogging
in interfaceReasoner
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setParameter
public void setParameter(Property parameter, java.lang.Object value)
Set a configuration paramter for the reasoner. In the case of the this reasoner there are no configuration parameters and this method is simply here to meet the interfaces specification- Specified by:
setParameter
in interfaceReasoner
- Parameters:
parameter
- the property identifying the parameter to be changedvalue
- the new value for the parameter, typically this is a wrapped java object like Boolean or Integer.
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getSubPropertyCache
public TransitiveGraphCache getSubPropertyCache()
Accessor used during infgraph construction - return the cached version of the subProperty lattice.
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getSubClassCache
public TransitiveGraphCache getSubClassCache()
Accessor used during infgraph construction - return the cached version of the subClass lattice.
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getTbox
public Finder getTbox()
Accessor used during infgraph construction - return the partially bound tbox, if any.
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getGraphCapabilities
public Capabilities getGraphCapabilities()
Return the Jena Graph Capabilties that the inference graphs generated by this reasoner are expected to conform to.- Specified by:
getGraphCapabilities
in interfaceReasoner
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