public class FunctionAllGroupsCollector extends AllGroupsCollector<MutableValue>
Implementation detail: Uses ValueSource and FunctionValues to retrieve the
field values to group by.
| Constructor and Description |
|---|
FunctionAllGroupsCollector(ValueSource groupBy,
Map<?,?> vsContext)
Constructs a
FunctionAllGroupsCollector instance. |
| 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. |
Collection<MutableValue> |
getGroups()
Returns the group values
|
getGroupCount, needsScores, setScorergetLeafCollectorpublic FunctionAllGroupsCollector(ValueSource groupBy, Map<?,?> vsContext)
FunctionAllGroupsCollector instance.groupBy - The ValueSource to group byvsContext - The ValueSource contextpublic Collection<MutableValue> getGroups()
AllGroupsCollector
This is an unordered collections of group values. For each group that matched the query there is a BytesRef
representing a group value.
getGroups in class AllGroupsCollector<MutableValue>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 SimpleCollectorIOException