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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.reasoner.rulesys   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.hp.hpl.jena.reasoner.rulesys.LPBackwardRuleReasoner LPBackwardRuleReasoner public class LPBackwardRuleReasoner implements Reasoner(Code) Reasoner implementation which augments or transforms an RDF graph according to a set of rules. The rules are processed using a tabled LP backchaining interpreter which is implemented by the relvant InfGraph class. author:    Dave Reynolds version:    $Revision: 1.11 $ on $Date: 2008/01/02 12:07:47 $ Field Summary protected  Capabilities capabilities      protected  ReasonerFactory factory      protected  boolean recordDerivations      protected  LPRuleStore ruleStore      protected  List rules      protected  Graph schemaGraph       boolean traceOn      Constructor Summary public   LPBackwardRuleReasoner(List rules)      Constructor. public   LPBackwardRuleReasoner(List rules, ReasonerFactory factory)      protected   LPBackwardRuleReasoner(LPBackwardRuleReasoner parent, Graph schemaGraph)      Internal constructor, used to generated a partial binding of a schema to a rule reasoner instance. Method Summary public  void addDescription(Model configSpec, Resource base)      Add a configuration description for this reasoner into a partial configuration specification model. public  InfGraph bind(Graph data)      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. Parameters:   data - the RDF data to be processed, some reasoners may restrictthe range of RDF which is legal here (e.g. public  Reasoner bindSchema(Graph tbox)      Precompute the implications of a schema graph. public  Reasoner bindSchema(Model tbox)      Precompute the implications of a schema Model. public  Capabilities getGraphCapabilities()      Return the Jena Graph Capabilties that the inference graphs generated by this reasoner are expected to conform to. public  Model getReasonerCapabilities()      Return a description of the capabilities of this reasoner encoded in RDF. public  List getRules()      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. public  void setParameter(Property parameter, Object value)      Set a configuration paramter for the reasoner. public  void setTraceOn(boolean state)      Set the state of the trace flag. public  boolean supportsProperty(Property property)      Determine whether the given property is recognized and treated specially by this reasoner. public synchronized  void tablePredicate(Node predicate)      Register an RDF predicate as one whose presence in a goal should force the goal to be tabled. Field Detail capabilities protected Capabilities capabilities(Code) The graph capabilities of the infgraphs generated by this reasoner factory protected ReasonerFactory factory(Code) The parent reasoner factory which is consulted to answer capability questions recordDerivations protected boolean recordDerivations(Code) Flag to set whether the inference class should record derivations ruleStore protected LPRuleStore ruleStore(Code) Indexed, normalized copy of the rule list rules protected List rules(Code) The rules to be used by this instance of the backward engine schemaGraph protected Graph schemaGraph(Code) A cache set of schema data used in partial binding chains traceOn boolean traceOn(Code) Flag which, if true, enables tracing of rule actions to logger.info Constructor Detail LPBackwardRuleReasoner public LPBackwardRuleReasoner(List rules)(Code) 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 LPBackwardRuleReasoner public LPBackwardRuleReasoner(List rules, ReasonerFactory factory)(Code) Constructor Parameters:   rules - a list of Rule instances which defines the ruleset to process Parameters:   factory - the parent reasoner factory which is consulted to answer capability questions LPBackwardRuleReasoner protected LPBackwardRuleReasoner(LPBackwardRuleReasoner parent, Graph schemaGraph)(Code) Internal constructor, used to generated a partial binding of a schema to a rule reasoner instance. Method Detail addDescription public void addDescription(Model configSpec, Resource base)(Code) Add a configuration description for this reasoner into a partial configuration specification model. Parameters:   configSpec - a Model into which the configuration information should be placed Parameters:   base - the Resource to which the configuration parameters should be added. bind public InfGraph bind(Graph data) throws ReasonerException(Code) 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. Parameters:   data - the RDF data to be processed, some reasoners may restrictthe range of RDF which is legal here (e.g. syntactic restrictions in OWL). an inference graph through which the data+reasoner can be queried. throws:   ReasonerException - if the data is ill-formed according to theconstraints imposed by this reasoner. bindSchema public Reasoner bindSchema(Graph tbox) throws ReasonerException(Code) Precompute the implications of a schema graph. The statements in the graph will be combined with the data when the final InfGraph is created. bindSchema public Reasoner bindSchema(Model tbox) throws ReasonerException(Code) Precompute the implications of a schema Model. The statements in the graph will be combined with the data when the final InfGraph is created. getGraphCapabilities public Capabilities getGraphCapabilities()(Code) Return the Jena Graph Capabilties that the inference graphs generated by this reasoner are expected to conform to. getReasonerCapabilities public Model getReasonerCapabilities()(Code) 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. getRules public List getRules()(Code) Return the this of Rules used by this reasoner a List of Rule objects setDerivationLogging public void setDerivationLogging(boolean logOn)(Code) 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. setParameter public void setParameter(Property parameter, Object value)(Code) 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 Parameters:   parameter - the property identifying the parameter to be changed Parameters:   value - the new value for the parameter, typically this is a wrappedjava object like Boolean or Integer. setTraceOn public void setTraceOn(boolean state)(Code) Set the state of the trace flag. If set to true then rule firings are logged out to the Log at "INFO" level. supportsProperty public boolean supportsProperty(Property property)(Code) Determine whether the given property is recognized and treated specially by this reasoner. This is a convenience packaging of a special case of getCapabilities. Parameters:   property - the property which we want to ask the reasoner about, given as a Node sincethis is part of the SPI rather than API true if the given property is handled specially by the reasoner. tablePredicate public synchronized void tablePredicate(Node predicate)(Code) Register an RDF predicate as one whose presence in a goal should force the goal to be tabled. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)