io.druid.segment

Interface ColumnValueSelector<T>

All Known Subinterfaces:

AggregateCombiner<T>, DimensionSelector, DoubleColumnSelector, FloatColumnSelector, HistoricalColumnSelector<T>, HistoricalDimensionSelector, LongColumnSelector, ObjectColumnSelector<T>, SingleValueDimensionSelector, SingleValueHistoricalDimensionSelector

All Known Implementing Classes:

BaseSingleValueDimensionSelector, ConstantDimensionSelector, DoubleAggregateCombiner, DoubleWrappingDimensionSelector, ExpressionObjectSelector, FloatWrappingDimensionSelector, HyperLogLogCollectorAggregateCombiner, LongAggregateCombiner, LongSumAggregateCombiner, LongWrappingDimensionSelector, NullDimensionSelector, NullStringObjectColumnSelector, ObjectAggregateCombiner, SingleScanTimeDimSelector, ZeroDoubleColumnSelector, ZeroFloatColumnSelector, ZeroLongColumnSelector

public interface ColumnValueSelector<T>

Base type for interfaces that manage column value selection, e.g. DimensionSelector, LongColumnSelector This interface has methods to get the value in all primitive types, that have corresponding basic aggregators in Druid: Sum, Min, Max, etc: getFloat(), getDouble() and getLong() to support "polymorphic" rollup aggregation during index merging.

Method Summary

Modifier and Type	Method and Description
Class<T>	classOfObject()
double	getDouble()
float	getFloat()
long	getLong()
T	getObject()

Method Detail

getFloat

float getFloat()

getDouble

double getDouble()

getLong

long getLong()

getObject

@Nullable
T getObject()

classOfObject

Class<T> classOfObject()