com.hp.hpl.jena.query
Interface QueryExecution

public interface QueryExecution

A interface for a single execution of a query.

Author:

Andy Seaborne

Method Summary

void	abort() Stop in mid execution.
void	close() Close the query execution and stop query evaluation as soon as convenient.
boolean	execAsk() Execute an ASK query
com.hp.hpl.jena.rdf.model.Model	execConstruct() Execute a CONSTRUCT query
com.hp.hpl.jena.rdf.model.Model	execConstruct(com.hp.hpl.jena.rdf.model.Model model) Execute a CONSTRUCT query, putting the statements into 'model'.
com.hp.hpl.jena.rdf.model.Model	execDescribe() Execute a DESCRIBE query
com.hp.hpl.jena.rdf.model.Model	execDescribe(com.hp.hpl.jena.rdf.model.Model model) Execute a DESCRIBE query, putting the statements into 'model'.
ResultSet	execSelect() Execute a SELECT query
com.hp.hpl.jena.sparql.util.Context	getContext() The properties associated with a query execution - implementation specific parameters This includes Java objects (so it is not an RDF graph).
Dataset	getDataset() The dataset agisnt which the query will execute.
void	setFileManager(com.hp.hpl.jena.util.FileManager fm) Set the FileManger that might be used to load files.
void	setInitialBinding(QuerySolution binding) Set the initial association of variables and values.

Method Detail

setFileManager

void setFileManager(com.hp.hpl.jena.util.FileManager fm)

Set the FileManger that might be used to load files. May not be supported by all QueryExecution implementations.

setInitialBinding

void setInitialBinding(QuerySolution binding)

Set the initial association of variables and values. May not be supported by all QueryExecution implementations.

Parameters:

binding -

getDataset

Dataset getDataset()

The dataset agisnt which the query will execute. May be null, implying it is expected that the query itself has a dataset description.

getContext

com.hp.hpl.jena.sparql.util.Context getContext()

The properties associated with a query execution - implementation specific parameters This includes Java objects (so it is not an RDF graph). Keys should be URIs as strings. May be null (this implementation does not provide any configuration).

execSelect

ResultSet execSelect()

Execute a SELECT query

execConstruct

com.hp.hpl.jena.rdf.model.Model execConstruct()

Execute a CONSTRUCT query

execConstruct

com.hp.hpl.jena.rdf.model.Model execConstruct(com.hp.hpl.jena.rdf.model.Model model)

Execute a CONSTRUCT query, putting the statements into 'model'.

Returns:

Model The model argument for casaded code.

execDescribe

com.hp.hpl.jena.rdf.model.Model execDescribe()

Execute a DESCRIBE query

execDescribe

com.hp.hpl.jena.rdf.model.Model execDescribe(com.hp.hpl.jena.rdf.model.Model model)

Execute a DESCRIBE query, putting the statements into 'model'.

Returns:

Model The model argument for casaded code.

execAsk

boolean execAsk()

Execute an ASK query

abort

void abort()

Stop in mid execution. No guarantee that the concrete implementation actual will stop or that it will do so immediately. No operations on the query execution or any associated result set are permitted after this call.

close

void close()

Close the query execution and stop query evaluation as soon as convenient. It is important to close query execution objects in order to release resources such as working memory and to stop the query execution. Some storage subsystems require explicit ends of operations and this operation will cause those to be called where necessary. No operations on the query execution or any associated result set are permitted after this call.