org.openrdf.sesame.sail.query
Class DuplicatesFilter

java.lang.Object
  org.openrdf.sesame.sail.query.DuplicatesFilter

All Implemented Interfaces:

QueryAnswerListener

public class DuplicatesFilter

extends Object

implements QueryAnswerListener

A QueryAnswerListener that filters any duplicates from the query results and forwards these filtered results to another QueryAnswerListener.

Constructor Summary

DuplicatesFilter(QueryAnswerListener l)
Creates a new DuplicatesFilter.

Method Summary

void	clear() Method called when the query engine has finished or aborted the query evaluation, signaling that the listener can/should clear any recorded and query-specific information.
boolean	queryAnswer(QueryAnswer qa) Reports a query answer to the listener.

Methods inherited from class java.lang.Object

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

Constructor Detail

DuplicatesFilter

public DuplicatesFilter(QueryAnswerListener l)

Creates a new DuplicatesFilter.

Parameters:

l - The QueryAnswerListener that will receive the filtered query results.

Method Detail

queryAnswer

public boolean queryAnswer(QueryAnswer qa)
                    throws IOException

Description copied from interface: QueryAnswerListener

Reports a query answer to the listener.

Specified by:

queryAnswer in interface QueryAnswerListener

Parameters:

qa - The query answer.

Returns:

A flag indicating whether the query engine should continue evaluating the (sub-)query.

Throws:

IOException

clear

public void clear()

Description copied from interface: QueryAnswerListener

Method called when the query engine has finished or aborted the query evaluation, signaling that the listener can/should clear any recorded and query-specific information.

Specified by:

clear in interface QueryAnswerListener