org.openrdf.sesame.query.rql.model
Class PropertySelector

java.lang.Object
  org.openrdf.sesame.query.rql.model.PropertySelector

All Implemented Interfaces:

Selector

public class PropertySelector

extends Object

implements Selector

Constructor Summary

PropertySelector(PropertyVar propVar, PropertyQuery propQ)
Creates a new PropertySelector that fills the supplied propVar with values from propQ. propQ is not allowed to be an instance of PropertyVar.

Method Summary

void	clear() Clears the Selector.
void	initialize(RdfSchemaSource rss) Gives the Selector the opportunity to initialize itself.
boolean	selectNext(RdfSchemaSource rss) Selects the next values.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertySelector

public PropertySelector(PropertyVar propVar,
                        PropertyQuery propQ)

Creates a new PropertySelector that fills the supplied propVar with values from propQ. propQ is not allowed to be an instance of PropertyVar.

Throws:

IllegalArgumentException - If propQ is an instance of PropertyVar.

Method Detail

initialize

public void initialize(RdfSchemaSource rss)
                throws QueryEvaluationException

Description copied from interface: Selector

Gives the Selector the opportunity to initialize itself.

Specified by:

initialize in interface Selector

Throws:

QueryEvaluationException

selectNext

public boolean selectNext(RdfSchemaSource rss)
                   throws QueryEvaluationException

Description copied from interface: Selector

Selects the next values. Returns true if the selection was successful, false otherwise.

Specified by:

selectNext in interface Selector

Throws:

QueryEvaluationException

clear

public void clear()

Description copied from interface: Selector

Clears the Selector. The Selector will release all resources it is currently using. After the Selector has been cleared it should be reusable by re-initializing it.

Specified by:

clear in interface Selector

toString

public String toString()