org.openrdf.sesame.sail.query
Class QueryResultsCounter

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

All Implemented Interfaces:

QueryAnswerListener

public class QueryResultsCounter

extends Object

implements QueryAnswerListener

A QueryAnswerListener that counts the number of reported query results and forwards them to another QueryAnswerListener.

Constructor Summary

QueryResultsCounter()
Creates a new QueryResultsCounter.

QueryResultsCounter(QueryAnswerListener l)
Creates a new QueryResultsCounter that forwards any query results to the specified listener.

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.
int	getCount() Gets the number of query answers that has been counted.
boolean	queryAnswer(QueryAnswer qa) Reports a query answer to the listener.
void	resetCounter() Resets the counter to 0.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryResultsCounter

public QueryResultsCounter()

Creates a new QueryResultsCounter.

QueryResultsCounter

public QueryResultsCounter(QueryAnswerListener l)

Creates a new QueryResultsCounter that forwards any query results to the specified listener.

Parameters:

l - A QueryAnswerListener.

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

getCount

public int getCount()

Gets the number of query answers that has been counted.

resetCounter

public void resetCounter()

Resets the counter to 0.