public class DelegatingCollector extends SimpleCollector
| Modifier and Type | Field and Description |
|---|---|
protected LeafReaderContext |
context |
protected Collector |
delegate |
protected int |
docBase |
protected LeafCollector |
leafDelegate |
protected Scorer |
scorer |
static int |
setLastDelegateCount |
| Constructor and Description |
|---|
DelegatingCollector() |
| Modifier and Type | Method and Description |
|---|---|
void |
collect(int doc)
Called once for every document matching a query, with the unbased document
number.
|
protected void |
doSetNextReader(LeafReaderContext context)
This method is called before collecting
context. |
void |
finish() |
Collector |
getDelegate() |
boolean |
needsScores()
Indicates if document scores are needed by this collector.
|
void |
setDelegate(Collector delegate) |
void |
setLastDelegate(Collector delegate)
Sets the last delegate in a chain of DelegatingCollectors
|
void |
setScorer(Scorer scorer)
Called before successive calls to
LeafCollector.collect(int). |
getLeafCollectorpublic static int setLastDelegateCount
protected LeafCollector leafDelegate
protected LeafReaderContext context
protected int docBase
public DelegatingCollector()
public Collector getDelegate()
public void setDelegate(Collector delegate)
public void setLastDelegate(Collector delegate)
public void setScorer(Scorer scorer) throws IOException
LeafCollectorLeafCollector.collect(int). Implementations
that need the score of the current document (passed-in to
LeafCollector.collect(int)), should save the passed-in Scorer and call
scorer.score() when needed.setScorer in interface LeafCollectorsetScorer in class SimpleCollectorIOExceptionpublic boolean needsScores()
Collectortrue if scores are needed.public void collect(int doc) throws IOException
LeafCollectorNote: The collection of the current segment can be terminated by throwing
a CollectionTerminatedException. In this case, the last docs of the
current LeafReaderContext will be skipped and IndexSearcher
will swallow the exception and continue collection with the next leaf.
Note: This is called in an inner search loop. For good search performance,
implementations of this method should not call IndexSearcher.doc(int) or
IndexReader.document(int) on every hit.
Doing so can slow searches by an order of magnitude or more.
collect in interface LeafCollectorcollect in class SimpleCollectorIOExceptionprotected void doSetNextReader(LeafReaderContext context) throws IOException
SimpleCollectorcontext.doSetNextReader in class SimpleCollectorIOExceptionpublic void finish() throws IOException
IOException