de.fuberlin.wiwiss.d2rq.find
Class TripleResultSet
java.lang.Object
de.fuberlin.wiwiss.d2rq.find.SQLResultSet
de.fuberlin.wiwiss.d2rq.find.TripleResultSet
- public class TripleResultSet
- extends SQLResultSet
Contains the result set from one SQL query and transforms it into triples.
A triple is produced for TripleMaker in TripleMaker and each row in the result set.
History:
06-06-2004: Initial version of this class.
08-03-2004: Almost complete rewrite to make logic more explicit.
- Version:
- V0.2
- Author:
- Chris Bizer chris@bizer.de, Richard Cyganiak
Field Summary |
private com.hp.hpl.jena.graph.Triple |
chachedTriple
The chached triple. |
protected boolean |
rsForward
|
private java.util.Iterator |
tripleMakerIterator
|
private java.util.ArrayList |
tripleMakers
List of tripleMakers that are used on every row of the result set. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
tripleMakers
private java.util.ArrayList tripleMakers
- List of tripleMakers that are used on every row of the result set.
tripleMakerIterator
private java.util.Iterator tripleMakerIterator
rsForward
protected boolean rsForward
chachedTriple
private com.hp.hpl.jena.graph.Triple chachedTriple
- The chached triple. A value of null means there is no triple
in the cache. A triple gets chached by hasNext() and is
delivered afterwards by next().
TripleResultSet
public TripleResultSet(java.lang.String SQL,
java.util.Map columnNameNumberMap,
Database db)
addTripleMaker
public void addTripleMaker(TripleQuery tripMaker)
hasTripleMakers
public boolean hasTripleMakers()
hasNext
public boolean hasNext()
next
public com.hp.hpl.jena.graph.Triple next()
- Returns the next triple.
If there are no more triple makers for the current row of the result set
then the next row is cached and the triple makers iterator is reset.
- Returns:
- The next triple, or null if no more triples.