java.lang.Object
org.apache.jena.reasoner.rulesys.BasicForwardRuleReasoner
- All Implemented Interfaces:
Reasoner
Reasoner implementation which augments or transforms an RDF graph
according to a set of rules. This trivial version does not support
separate schema processing. The actual work is done in the inference
graph implementation.
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Constructor Summary
ConstructorDescriptionBasicForwardRuleReasoner
(List<Rule> rules) Constructor.BasicForwardRuleReasoner
(List<Rule> rules, ReasonerFactory factory) Constructor -
Method Summary
Modifier and TypeMethodDescriptionvoid
addDescription
(Model configSpec, Resource base) Add a configuration description for this reasoner into a partial configuration specification model.Attach the reasoner to a set of RDF data to process.bindSchema
(Graph tbox) Precompute the implications of a schema graph.bindSchema
(Model tbox) Precompute the implications of a schema Model.Return the Jena Graph Capabilities that the inference graphs generated by this reasoner are expected to conform to.Return a description of the capabilities of this reasoner encoded in RDF.getRules()
Return the this of Rules used by this reasonervoid
setDerivationLogging
(boolean logOn) Switch on/off derivation logging.void
setParameter
(Property parameter, Object value) Set a configuration paramter for the reasoner.void
setTraceOn
(boolean state) Set the state of the trace flag.boolean
supportsProperty
(Property property) Determine whether the given property is recognized and treated specially by this reasoner.
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Constructor Details
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BasicForwardRuleReasoner
Constructor. This is the raw version that does not reference a ReasonerFactory and so has no capabilities description.- Parameters:
rules
- a list of Rule instances which defines the ruleset to process
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BasicForwardRuleReasoner
Constructor- Parameters:
rules
- a list of Rule instances which defines the ruleset to processfactory
- the parent reasoner factory which is consulted to answer capability questions
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Method Details
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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
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
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
Precompute the implications of a schema graph. The statements in the graph will be combined with the data when the final InfGraph is created.- Specified by:
bindSchema
in interfaceReasoner
- Parameters:
tbox
- the ontology axioms or rule set encoded in RDF- 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
Precompute the implications of a schema Model. The statements in the graph will be combined with the data when the final InfGraph is created.- Specified by:
bindSchema
in interfaceReasoner
- Parameters:
tbox
- the ontology axioms or rule set encoded in RDF- 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
Attach the reasoner to a set of RDF data 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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getRules
Return the this of Rules used by this reasoner- Returns:
- a List of Rule objects
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setDerivationLogging
public void setDerivationLogging(boolean logOn) Switch on/off derivation 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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setTraceOn
public void setTraceOn(boolean state) Set the state of the trace flag. If set to true then rule firings are logged out to the Logger at "INFO" level. -
setParameter
Set a configuration paramter for the reasoner. The supported parameters are:- BasicForwardedRuleReasoner.PROPderivationLogging - set to true to enable recording all rule derivations
- BasicForwardedRuleReasoner.PROPtraceOn - set to true to enable verbose trace information to be sent to the logger INFO channel
- 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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getGraphCapabilities
Return the Jena Graph Capabilities that the inference graphs generated by this reasoner are expected to conform to.- Specified by:
getGraphCapabilities
in interfaceReasoner
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