public class TermAllGroupsCollector extends AbstractAllGroupsCollector<BytesRef>
Constructor and Description |
---|
TermAllGroupsCollector(String groupField)
Constructs a
AbstractAllGroupsCollector . |
TermAllGroupsCollector(String groupField,
int initialSize)
Expert: Constructs a
AbstractAllGroupsCollector |
Modifier and Type | Method and Description |
---|---|
void |
collect(int doc)
Called once for every document matching a query, with the unbased document
number.
|
Collection<BytesRef> |
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 TermAllGroupsCollector(String groupField, int initialSize)
AbstractAllGroupsCollector
groupField
- The field to group byinitialSize
- The initial allocation size of the
internal int set and group list
which should roughly match the total
number of expected unique groups. Be aware that the
heap usage is 4 bytes * initialSize.public TermAllGroupsCollector(String groupField)
AbstractAllGroupsCollector
. This sets the
initial allocation size for the internal int set and group
list to 128.groupField
- The field to group bypublic 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 Collection<BytesRef> getGroups()
AbstractAllGroupsCollector
BytesRef
representing a group value.getGroups
in class AbstractAllGroupsCollector<BytesRef>
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
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