com.hp.hpl.jena.rdql
Interface QueryResults

All Superinterfaces:

java.util.Iterator

All Known Subinterfaces:

QueryResultsRewindable

All Known Implementing Classes:

QueryResultsMem, QueryResultsStream

public interface QueryResults

extends java.util.Iterator

Results from a query in a "ResultSet"-like manner. Each row corresponds to a set of bindings which fulfil the conditions of the query. Access to the results is by variable name.

Version:

$Id: QueryResults.java,v 1.4 2003/03/19 17:16:55 andy_seaborne Exp $

Author:

Andy Seaborne

See Also:

Query, QueryEngine, ResultBinding, QueryResultsStream

Method Summary

void	close() Close the results iterator and stop query evaluation as soon as convenient.
java.util.List	getAll() Deprecated. Use QueryResultsMem to get all the results of a query.
java.util.List	getResultVars() Get the variable names for the projection
int	getRowNumber() Return the "row" number for the current iterator item
boolean	hasNext() Is there another possibility?
java.lang.Object	next() Moves onto the next result possibility.
void	remove()

Method Detail

remove

public void remove()
            throws java.lang.UnsupportedOperationException

Specified by:

remove in interface java.util.Iterator

Throws:

java.lang.UnsupportedOperationException - Always thrown.

hasNext

public boolean hasNext()

Is there another possibility?

Specified by:

hasNext in interface java.util.Iterator

next

public java.lang.Object next()

Moves onto the next result possibility. The returned object should be of class ResultBinding

Specified by:

next in interface java.util.Iterator

close

public void close()

Close the results iterator and stop query evaluation as soon as convenient. It is important to close query result iterators inorder 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.

getRowNumber

public int getRowNumber()

Return the "row" number for the current iterator item

getResultVars

public java.util.List getResultVars()

Get the variable names for the projection

getAll

public java.util.List getAll()

Deprecated. Use QueryResultsMem to get all the results of a query.

Convenience function to consume a query. Returns a list of ResultBindings.

Returns:

List