de.fuberlin.wiwiss.d2rq.sql

Class SQLIterator

java.lang.Object

de.fuberlin.wiwiss.d2rq.sql.SQLIterator

All Implemented Interfaces:

com.hp.hpl.jena.util.iterator.ClosableIterator<ResultRow>, Iterator<ResultRow>

public class SQLIterator
extends Object
implements com.hp.hpl.jena.util.iterator.ClosableIterator<ResultRow>

Executes an SQL query and delivers result rows as an iterator over ResultRows. The query is executed lazily. This class logs all executed SQL queries.

Author:

Chris Bizer chris@bizer.de, Richard Cyganiak (richard@cyganiak.de)

Constructor Summary

Constructors

Constructor and Description
SQLIterator(String sql, List<ProjectionSpec> columns, ConnectedDB db)

Method Summary

Methods

Modifier and Type	Method and Description
void	cancel()
void	close() Make sure the SQL result set is closed and freed.
boolean	hasNext()
ResultRow	next()
ResultRow	nextRow() Deprecated. Use next() instead
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLIterator

public SQLIterator(String sql,
           List<ProjectionSpec> columns,
           ConnectedDB db)

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<ResultRow>

next

public ResultRow next()

Specified by:

next in interface Iterator<ResultRow>

Returns:

The next query ResultRow.

nextRow

public ResultRow nextRow()

Deprecated. Use next() instead

close

public void close()

Make sure the SQL result set is closed and freed. Will auto-close when the record-set is exhausted.

Specified by:

close in interface com.hp.hpl.jena.util.iterator.ClosableIterator<ResultRow>

cancel

public void cancel()

remove

public void remove()

Specified by:

remove in interface Iterator<ResultRow>