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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.rdf.arp 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


com.hp.hpl.jena.rdf.arp.ExtendedHandler

ExtendedHandler
public interface ExtendedHandler (Code)
Extended callbacks from a reader to an RDF application. This reports:
  • when a blank node goes out of scope, allowing its anonymous ID to be freed by external applications.
  • when a rdf:RDF start and end tag is seen
    author:
       Simon Raboczi, Jeremy Carroll




Method Summary
public  booleandiscardNodesWithNodeID()
     This method is used to modify the behaviour of ARP concerning its reporting of bnode scope ExtendedHandler.endBNodeScope .

If this returns true then blank nodes with an rdf:nodeID are not reported as they go out of scope at the end of file.

public  voidendBNodeScope(AResource bnode)
     After this call, no more triples will be reported which use bnode. This is called exactly once for each blank nodes.
public  voidendRDF()
     Called when the </rdf:RDF> tag is seen. (Also called when there is an implicit end of RDF content e.g.
public  voidstartRDF()
     Called when the <rdf:RDF> tag is seen.



Method Detail
discardNodesWithNodeID
public boolean discardNodesWithNodeID()(Code)
This method is used to modify the behaviour of ARP concerning its reporting of bnode scope ExtendedHandler.endBNodeScope .

If this returns true then blank nodes with an rdf:nodeID are not reported as they go out of scope at the end of file. This eliminates the unbounded memory cost of remembering such nodes.

If this returns false then the contract of ExtendedHandler.endBNodeScope is honoured uniformly independent of whether a blank node has a nodeID or not.

If this method returns different values during the parsing of a single file, then the behaviour is undefined. Desired behaviour of endBNodeScope.




endBNodeScope
public void endBNodeScope(AResource bnode)(Code)
After this call, no more triples will be reported which use bnode. This is called exactly once for each blank nodes. Whether this includes nodes with an rdf:nodeID is controlled by ExtendedHandler.discardNodesWithNodeID .

The contract is robust against syntax errors in input, and exceptions being thrown by the StatementHandler.
Parameters:
  bnode - A blank node going out of scope.




endRDF
public void endRDF()(Code)
Called when the </rdf:RDF> tag is seen. (Also called when there is an implicit end of RDF content e.g. when the file consists only of RDF but omits the rdf:RDF tag, or if there is an unrecoverable syntax error mid-file).

Robust against syntax errors in input, and exceptions being thrown by the StatementHandler.




startRDF
public void startRDF()(Code)
Called when the <rdf:RDF> tag is seen. (Also called when there is an implicit start of RDF content when the file consists only of RDF but omits the rdf:RDF tag).



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