org.apache.druid.query.aggregation.hyperloglog

Class HyperUniquesSerde

java.lang.Object

org.apache.druid.segment.serde.ComplexMetricSerde

org.apache.druid.query.aggregation.hyperloglog.HyperUniquesSerde

Direct Known Subclasses:

PreComputedHyperUniquesSerde

public class HyperUniquesSerde
extends ComplexMetricSerde

Constructor Summary

Constructors

Constructor and Description
HyperUniquesSerde()
HyperUniquesSerde(HyperLogLogHash hyperLogLogHash)

Method Summary

Modifier and Type	Method and Description
void	deserializeColumn(ByteBuffer byteBuffer, ColumnBuilder columnBuilder) ComplexMetricSerde.deserializeColumn(ByteBuffer, ColumnBuilder, ColumnConfig) should be used instead of this.
ComplexMetricExtractor<HyperLogLogCollector>	getExtractor()
ObjectStrategy	getObjectStrategy() This is deprecated because its usage is going to be removed from the code.
GenericColumnSerializer	getSerializer(SegmentWriteOutMedium segmentWriteOutMedium, String column) This method provides the ability for a ComplexMetricSerde to control its own serialization.
String	getTypeName()

Methods inherited from class org.apache.druid.segment.serde.ComplexMetricSerde

deserializeColumn, fromBytes, inputSizeFn, toBytes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HyperUniquesSerde

public HyperUniquesSerde()

HyperUniquesSerde

public HyperUniquesSerde(HyperLogLogHash hyperLogLogHash)

Method Detail

getTypeName

public String getTypeName()

Specified by:

getTypeName in class ComplexMetricSerde

getExtractor

public ComplexMetricExtractor<HyperLogLogCollector> getExtractor()

Specified by:

getExtractor in class ComplexMetricSerde

deserializeColumn

public void deserializeColumn(ByteBuffer byteBuffer,
                              ColumnBuilder columnBuilder)

Description copied from class: ComplexMetricSerde

ComplexMetricSerde.deserializeColumn(ByteBuffer, ColumnBuilder, ColumnConfig) should be used instead of this. This method is left for backward compatibility.

Specified by:

deserializeColumn in class ComplexMetricSerde

getObjectStrategy

public ObjectStrategy getObjectStrategy()

Description copied from class: ComplexMetricSerde

This is deprecated because its usage is going to be removed from the code.

It was introduced before deserializeColumn() existed. This method creates the assumption that Druid knows how to interpret the actual column representation of the data, but I would much prefer that the ComplexMetricSerde objects be in charge of creating and interpreting the whole column, which is what deserializeColumn lets them do.

Specified by:

getObjectStrategy in class ComplexMetricSerde

Returns:

an ObjectStrategy as used by GenericIndexed

getSerializer

public GenericColumnSerializer getSerializer(SegmentWriteOutMedium segmentWriteOutMedium,
                                             String column)

Description copied from class: ComplexMetricSerde

This method provides the ability for a ComplexMetricSerde to control its own serialization. For large column (i.e columns greater than Integer.MAX_VALUE) use LargeColumnSupportedComplexColumnSerializer

Overrides:

getSerializer in class ComplexMetricSerde

Returns:

an instance of GenericColumnSerializer used for serialization.