org.modeshape.jcr.query.lucene.basic
Class BasicTupleCollector

java.lang.Object
  org.apache.lucene.search.Collector
      org.modeshape.jcr.query.lucene.LuceneQueryEngine.TupleCollector
          org.modeshape.jcr.query.lucene.basic.BasicTupleCollector

@NotThreadSafe
public class BasicTupleCollector
extends LuceneQueryEngine.TupleCollector

The BasicLuceneSchema does not store any fields in the indexes, with the exception of the document identifier in which we're storing the key of the node that the document represents. Thus, in order to provide for each document the column values for each tuple, this collector looks up the CachedNode for each tuple using the QueryContext's RepositoryCache and then finds the property value for each required column.

In all cases, only the persisted workspace content appears in the indexes, so every Lucene Query only operates against this persisted content. However, the query results might reflect either only the persisted workspace content or the session's view of the content (which includes both its transient state as well as the persisted workspace content), depending upon whether the QueryContext's NodeCache is actually a WorkspaceCache or a SessionCache.

This class's constructor prepares the information that's ncessary to access the tuple values as fast as possible.

Nested Class Summary

protected static class	BasicTupleCollector.LocalNameColumnAssignment
protected static class	BasicTupleCollector.NameColumnAssignment
protected static class	BasicTupleCollector.NodeDepthColumnAssignment
protected static class	BasicTupleCollector.PathColumnAssignment
protected static class	BasicTupleCollector.PseudoColumnAssignment
protected static class	BasicTupleCollector.ScoreColumnAssignment

Constructor Summary

BasicTupleCollector(QueryContext queryContext, QueryResults.Columns columns)

Method Summary

boolean	acceptsDocsOutOfOrder()
float	doCollect(int doc)
List<Object[]>	getTuples() Get the tuples.
void	setNextReader(org.apache.lucene.index.IndexReader reader, int docBase)
void	setScorer(org.apache.lucene.search.Scorer scorer)

Methods inherited from class org.modeshape.jcr.query.lucene.LuceneQueryEngine.TupleCollector

collect

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicTupleCollector

public BasicTupleCollector(QueryContext queryContext,
                           QueryResults.Columns columns)

Method Detail

setScorer

public void setScorer(org.apache.lucene.search.Scorer scorer)

Specified by:

setScorer in class org.apache.lucene.search.Collector

setNextReader

public void setNextReader(org.apache.lucene.index.IndexReader reader,
                          int docBase)

Specified by:

setNextReader in class org.apache.lucene.search.Collector

acceptsDocsOutOfOrder

public boolean acceptsDocsOutOfOrder()

Specified by:

acceptsDocsOutOfOrder in class org.apache.lucene.search.Collector

doCollect

public float doCollect(int doc)
                throws IOException

Specified by:

doCollect in class LuceneQueryEngine.TupleCollector

Throws:

IOException

getTuples

public List<Object[]> getTuples()

Description copied from class: LuceneQueryEngine.TupleCollector

Get the tuples.

Specified by:

getTuples in class LuceneQueryEngine.TupleCollector

Returns:

the tuples; never null