Module org.apache.jena.arq

Package org.apache.jena.sparql.engine

Class ResultSetStream

java.lang.Object

org.apache.jena.sparql.engine.ResultSetStream

All Implemented Interfaces:

Iterator<QuerySolution>, ResultSet

Direct Known Subclasses:

ResultSetAdapter

public class ResultSetStream
extends Object
implements ResultSet

The main ResultSet implementation for returning results from queries. This version is "use once" - you can not reset the result set because the results of the query are not remembered so as not to consume potentially large amounts of memory.

Constructor Summary

Constructors

Constructor	Description
ResultSetStream(List<String> resultVars, Model m, Iterator<Binding> iter)	Deprecated. Use create(java.util.List<java.lang.String>, org.apache.jena.rdf.model.Model, java.util.Iterator<org.apache.jena.sparql.engine.binding.Binding>)

Method Summary

Modifier and Type	Method	Description
void	close()
static ResultSet	create(List<String> resultVars, Model m, Iterator<Binding> iter)	Create a streaming ResultSet, with resources sharing a common Model
static ResultSet	create(List<Var> resultVars, Iterator<Binding> iter)	Create a ResultSet from a List<Var> and an Iterator<Binding>.
void	forEachRemaining(Consumer<? super QuerySolution> action)
Model	getModel()
Model	getResourceModel()	Get the model that resources are created against - may be null
List<String>	getResultVars()	Get the variable names for the projection
int	getRowNumber()	Return the "row number" - a count of the number of possibilities returned so far.
boolean	hasNext()	Is there another possibility?
QuerySolution	next()	Moves onto the next result possibility.
Binding	nextBinding()	Move to the next binding (low level)
QuerySolution	nextSolution()	Moves onto the next result possibility.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

remove

Methods inherited from interface org.apache.jena.query.ResultSet

materialise, rewindable

Constructor Details

ResultSetStream

@Deprecated
public ResultSetStream(List<String> resultVars,
 Model m,
 Iterator<Binding> iter)

Deprecated.

Use create(java.util.List<java.lang.String>, org.apache.jena.rdf.model.Model, java.util.Iterator<org.apache.jena.sparql.engine.binding.Binding>)

Method Details

create

public static ResultSet create(List<String> resultVars,
 Model m,
 Iterator<Binding> iter)

Create a streaming ResultSet, with resources sharing a common Model

create

public static ResultSet create(List<Var> resultVars,
 Iterator<Binding> iter)

Create a ResultSet from a List<Var> and an Iterator<Binding>.

hasNext

public boolean hasNext()

Is there another possibility?

Specified by:

hasNext in interface Iterator<QuerySolution>

Specified by:

hasNext in interface ResultSet

nextBinding

public Binding nextBinding()

Description copied from interface: ResultSet

Move to the next binding (low level)

Specified by:

nextBinding in interface ResultSet

close

public void close()

Specified by:

close in interface ResultSet

nextSolution

public QuerySolution nextSolution()

Moves onto the next result possibility. The returned object is actual the binding for this result.

Specified by:

nextSolution in interface ResultSet

next

public QuerySolution next()

Moves onto the next result possibility.

Specified by:

next in interface Iterator<QuerySolution>

Specified by:

next in interface ResultSet

forEachRemaining

public void forEachRemaining(Consumer<? super QuerySolution> action)

Specified by:

forEachRemaining in interface Iterator<QuerySolution>

Specified by:

forEachRemaining in interface ResultSet

getRowNumber

public int getRowNumber()

Return the "row number" - a count of the number of possibilities returned so far. Remains valid (as the total number of possibilities) after the iterator ends.

Specified by:

getRowNumber in interface ResultSet

getResultVars

public List<String> getResultVars()

Get the variable names for the projection

Specified by:

getResultVars in interface ResultSet

getModel

public Model getModel()

getResourceModel

public Model getResourceModel()

Description copied from interface: ResultSet

Get the model that resources are created against - may be null

Specified by:

getResourceModel in interface ResultSet