public class FunctionAllGroupsCollector extends AbstractAllGroupsCollector<MutableValue>
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.
|
Collection<MutableValue> |
getGroups()
Returns the group values
This is an unordered collections of group values.
|
void |
setNextReader(AtomicReaderContext context)
Called before collecting from each
AtomicReaderContext . |
acceptsDocsOutOfOrder, getGroupCount, setScorer
public FunctionAllGroupsCollector(ValueSource groupBy, Map<?,?> vsContext)
FunctionAllGroupsCollector
instance.groupBy
- The ValueSource
to group byvsContext
- The ValueSource contextpublic Collection<MutableValue> getGroups()
AbstractAllGroupsCollector
BytesRef
representing a group value.getGroups
in class AbstractAllGroupsCollector<MutableValue>
public void collect(int doc) throws IOException
Collector
Note: The collection of the current segment can be terminated by throwing
a CollectionTerminatedException
. In this case, the last docs of the
current AtomicReaderContext
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 class Collector
IOException
public void setNextReader(AtomicReaderContext context) throws IOException
Collector
AtomicReaderContext
. All doc ids in
Collector.collect(int)
will correspond to IndexReaderContext.reader()
.
Add AtomicReaderContext.docBase
to the current IndexReaderContext.reader()
's
internal document id to re-base ids in Collector.collect(int)
.setNextReader
in class Collector
context
- next atomic reader contextIOException
Copyright © 2000-2015 The Apache Software Foundation. All Rights Reserved.