org.aksw.commons.sparql.api.core
Class QueryExecutionBaseSelect

java.lang.Object
  org.aksw.commons.sparql.api.core.QueryExecutionDecorator
      org.aksw.commons.sparql.api.core.QueryExecutionBaseSelect

All Implemented Interfaces:

com.hp.hpl.jena.query.QueryExecution, QueryExecutionStreaming

public abstract class QueryExecutionBaseSelect
extends QueryExecutionDecorator
implements QueryExecutionStreaming

A Sparqler-class that implements ask, describe, and construct based on the executeCoreSelect(Query) method. Also, works on String and Query level. Some of the code has been taken from com.hp.hpl.jena.sparql.engine.QueryExecutionBase, which is a class with a similar purpose but not as reusable as this one (This class reduces all operations to a single executeCoreSelect call) NOTE: executeCoreSelect will close this query execution once the ResultSet is consumed.

Author:

raven

Field Summary

Fields inherited from class org.aksw.commons.sparql.api.core.QueryExecutionDecorator

decoratee

Constructor Summary

QueryExecutionBaseSelect(com.hp.hpl.jena.query.Query query, QueryExecutionFactory<QueryExecutionStreaming> subFactory)

Method Summary

static com.hp.hpl.jena.rdf.model.Model	createModel(Iterator<com.hp.hpl.jena.graph.Triple> it)
static com.hp.hpl.jena.rdf.model.Model	createModel(com.hp.hpl.jena.rdf.model.Model result, Iterator<com.hp.hpl.jena.graph.Triple> it)
boolean	execAsk()
com.hp.hpl.jena.rdf.model.Model	execConstruct(com.hp.hpl.jena.rdf.model.Model result)
Iterator<com.hp.hpl.jena.graph.Triple>	execConstructStreaming()
com.hp.hpl.jena.rdf.model.Model	execDescribe()
com.hp.hpl.jena.rdf.model.Model	execDescribe(com.hp.hpl.jena.rdf.model.Model result) A describe query is translated into a construct query.
Iterator<com.hp.hpl.jena.graph.Triple>	execDescribeStreaming() We use this query execution for retrieving the result set of the where clause, but we neet the subFactory to describe the individual resources then.
com.hp.hpl.jena.query.ResultSet	execSelect()
protected com.hp.hpl.jena.query.ResultSet	executeCoreSelect(com.hp.hpl.jena.query.Query query)
protected abstract com.hp.hpl.jena.query.QueryExecution	executeCoreSelectX(com.hp.hpl.jena.query.Query query)
void	executeUpdate(com.hp.hpl.jena.update.UpdateRequest updateRequest)
static com.hp.hpl.jena.graph.Node	extractDescribeNode(com.hp.hpl.jena.query.Query query)

Methods inherited from class org.aksw.commons.sparql.api.core.QueryExecutionDecorator

abort, close, execConstruct, getContext, getDataset, getDecoratee, getQuery, setDecoratee, setFileManager, setInitialBinding, setTimeout, setTimeout, setTimeout, setTimeout

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.hp.hpl.jena.query.QueryExecution

abort, close, execConstruct, getContext, getDataset, getQuery, setFileManager, setInitialBinding, setTimeout, setTimeout, setTimeout, setTimeout

Constructor Detail

QueryExecutionBaseSelect

public QueryExecutionBaseSelect(com.hp.hpl.jena.query.Query query,
                                QueryExecutionFactory<QueryExecutionStreaming> subFactory)

Method Detail

createModel

public static com.hp.hpl.jena.rdf.model.Model createModel(Iterator<com.hp.hpl.jena.graph.Triple> it)

createModel

public static com.hp.hpl.jena.rdf.model.Model createModel(com.hp.hpl.jena.rdf.model.Model result,
                                                          Iterator<com.hp.hpl.jena.graph.Triple> it)

executeCoreSelectX

protected abstract com.hp.hpl.jena.query.QueryExecution executeCoreSelectX(com.hp.hpl.jena.query.Query query)

executeCoreSelect

protected com.hp.hpl.jena.query.ResultSet executeCoreSelect(com.hp.hpl.jena.query.Query query)

execAsk

public boolean execAsk()

Specified by:

execAsk in interface com.hp.hpl.jena.query.QueryExecution

Overrides:

execAsk in class QueryExecutionDecorator

execDescribe

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

Specified by:

execDescribe in interface com.hp.hpl.jena.query.QueryExecution

Overrides:

execDescribe in class QueryExecutionDecorator

extractDescribeNode

public static com.hp.hpl.jena.graph.Node extractDescribeNode(com.hp.hpl.jena.query.Query query)

execDescribeStreaming

public Iterator<com.hp.hpl.jena.graph.Triple> execDescribeStreaming()

We use this query execution for retrieving the result set of the where clause, but we neet the subFactory to describe the individual resources then.

Specified by:

execDescribeStreaming in interface QueryExecutionStreaming

Returns:

execDescribe

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

A describe query is translated into a construct query. Lets see... Describe ?a ?b ... <x><y> Where Pattern { ... } becomes ...? Construct { ?a ?ap ?ao . ?b ?bp ?bo . } Where Pattern { } Union {} Ah, lets just query every resource individually for now TODO Add support for concise bounded descriptions...

Specified by:

execDescribe in interface com.hp.hpl.jena.query.QueryExecution

Overrides:

execDescribe in class QueryExecutionDecorator

Parameters:

result -

Returns:

execConstruct

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

Specified by:

execConstruct in interface com.hp.hpl.jena.query.QueryExecution

Overrides:

execConstruct in class QueryExecutionDecorator

execConstructStreaming

public Iterator<com.hp.hpl.jena.graph.Triple> execConstructStreaming()

Specified by:

execConstructStreaming in interface QueryExecutionStreaming

execSelect

public com.hp.hpl.jena.query.ResultSet execSelect()

Specified by:

execSelect in interface com.hp.hpl.jena.query.QueryExecution

Overrides:

execSelect in class QueryExecutionDecorator

executeUpdate

public void executeUpdate(com.hp.hpl.jena.update.UpdateRequest updateRequest)