Package org.apache.druid.segment

Interface DoubleColumnSelector

All Superinterfaces:

BaseDoubleColumnValueSelector, BaseFloatColumnValueSelector, BaseLongColumnValueSelector, BaseNullableColumnValueSelector, BaseObjectColumnValueSelector<Double>, ColumnValueSelector<Double>, HotLoopCallee

All Known Implementing Classes:

DoubleAggregateCombiner, SettableDoubleColumnValueSelector

public interface DoubleColumnSelector
extends ColumnValueSelector<Double>

This interface is convenient for implementation of "double-sourcing" ColumnValueSelectors, it provides default implementations for all ColumnValueSelector's methods except BaseDoubleColumnValueSelector.getDouble(). This interface should appear ONLY in "implements" clause or anonymous class creation, but NOT in "user" code, where BaseDoubleColumnValueSelector must be used instead.

Field Summary

Fields inherited from interface org.apache.druid.segment.ColumnValueSelector

EMPTY_ARRAY

Method Summary

Modifier and Type	Method	Description
default Class<Double>	classOfObject()	Deprecated. This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling.
default float	getFloat()	Deprecated. This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling.
default long	getLong()	Deprecated. This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling.
default Double	getObject()	Deprecated. This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling.

Methods inherited from interface org.apache.druid.segment.BaseDoubleColumnValueSelector

getDouble

Methods inherited from interface org.apache.druid.segment.BaseNullableColumnValueSelector

isNull

Methods inherited from interface org.apache.druid.query.monomorphicprocessing.HotLoopCallee

inspectRuntimeShape

Method Detail

getFloat

@Deprecated
default float getFloat()

Deprecated.

This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling. "Polymorphism" of DoubleColumnSelector should be used only when operating on ColumnValueSelector objects.

Specified by:

getFloat in interface BaseFloatColumnValueSelector

getLong

@Deprecated
default long getLong()

Deprecated.

This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling. "Polymorphism" of DoubleColumnSelector should be used only when operating on ColumnValueSelector objects.

Specified by:

getLong in interface BaseLongColumnValueSelector

getObject

@Deprecated
@Nullable
default Double getObject()

Deprecated.

This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling. "Polymorphism" of DoubleColumnSelector should be used only when operating on ColumnValueSelector objects.

Description copied from interface: BaseObjectColumnValueSelector

Returns the currently-selected object. The behavior of this method depends on the type of selector, which can be determined by calling ColumnSelectorFactory.getColumnCapabilities(String) on the same ColumnSelectorFactory that you got this selector from. If the capabilties are nonnull, the selector type is given by TypeSignature.getType(). String selectors, where type is ColumnType.STRING, may return any type of object from this method, especially in cases where the selector is casting objects to string at selection time. Callers are encouraged to avoid the need to deal with various objects by using ColumnSelectorFactory.makeDimensionSelector(org.apache.druid.query.dimension.DimensionSpec) instead. Numeric selectors, where TypeSignature.isNumeric(), may return any type of Number. Callers that wish to deal with more specific types should treat the original ColumnValueSelector as a BaseLongColumnValueSelector, BaseDoubleColumnValueSelector, or BaseFloatColumnValueSelector instead. Array selectors, where TypeSignature.isArray(), must return Object[]. The array may contain null elements, and the array itself may also be null. Selectors of unknown type, where ColumnSelectorFactory.getColumnCapabilities(String) returns null, may return any type of object. Callers must be prepared for a wide variety of possible input objects. This case is common during ingestion, where selectors are built on top of external data.

Specified by:

getObject in interface BaseObjectColumnValueSelector<Double>

classOfObject

@Deprecated
default Class<Double> classOfObject()

Deprecated.

This method is marked as deprecated in DoubleColumnSelector to minimize the probability of accidental calling. "Polymorphism" of DoubleColumnSelector should be used only when operating on ColumnValueSelector objects.

Description copied from interface: BaseObjectColumnValueSelector

Most-specific class of object returned by BaseObjectColumnValueSelector.getObject(), if known in advance. This method returns Object when selectors do not know in advance what class of object they may return.

Specified by:

classOfObject in interface BaseObjectColumnValueSelector<Double>