public class SampleOperation extends Object implements AggregationOperation
$sample
-operation.
We recommend to use the static factory method Aggregation.sample(long)
instead of creating instances of this
class directly.
Constructor and Description |
---|
SampleOperation(long sampleSize) |
Modifier and Type | Method and Description |
---|---|
String |
getOperator()
Return the MongoDB operator that is used for this
AggregationOperation . |
org.bson.Document |
toDocument(AggregationOperationContext context)
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
toPipelineStages
public SampleOperation(long sampleSize)
sampleSize
- number of documents to be randomly selected from its input.public org.bson.Document toDocument(AggregationOperationContext context)
AggregationOperation
toDocument
in interface AggregationOperation
context
- the AggregationOperationContext
to operate within. Must not be null.public String getOperator()
AggregationOperation
AggregationOperation
. Aggregation operations should
implement this method to avoid document rendering.getOperator
in interface AggregationOperation
AggregationOperation
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