Package org.apache.druid.segment.incremental

Class IncrementalIndexRowHolder

java.lang.Object

org.apache.druid.segment.incremental.IncrementalIndexRowHolder

All Implemented Interfaces:

HotLoopCallee, BaseDoubleColumnValueSelector, BaseFloatColumnValueSelector, BaseLongColumnValueSelector, BaseNullableColumnValueSelector, BaseObjectColumnValueSelector<Long>, ColumnValueSelector<Long>, LongColumnSelector

public class IncrementalIndexRowHolder
extends Object
implements LongColumnSelector

IncrementalIndexRowHolder is a simple get()/set(org.apache.druid.segment.incremental.IncrementalIndexRow) holder of IncrementalIndexRow. It is used to implement various machinery around IncrementalIndex, e. g. IncrementalIndexColumnSelectorFactory, IncrementalIndexRowIterator, etc. By implementing LongColumnSelector, IncrementalIndexRowHolder plays the role of timestamp column selector, to avoid unneeded level of indirection when timestamp column is selected in ColumnSelectorFactory.makeColumnValueSelector(String).

Field Summary

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

EMPTY_ARRAY

Constructor Summary

Constructors

Constructor	Description
IncrementalIndexRowHolder()

Method Summary

Modifier and Type	Method	Description
IncrementalIndexRow	get()
long	getLong()
void	inspectRuntimeShape(RuntimeShapeInspector inspector)	Implementations of this method should call inspector.visit() with all fields of this class, which meet two conditions: 1.
boolean	isNull()	Returns true if the primitive long, double, or float value returned by this selector should be treated as null.
void	set(IncrementalIndexRow currEntry)

Methods inherited from class java.lang.Object

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

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

classOfObject, getDouble, getFloat, getObject

Constructor Details

IncrementalIndexRowHolder

public IncrementalIndexRowHolder()

Method Details

get

@Nullable
public IncrementalIndexRow get()

set

public void set(IncrementalIndexRow currEntry)

getLong

public long getLong()

Specified by:

getLong in interface BaseLongColumnValueSelector

isNull

public boolean isNull()

Description copied from interface: BaseNullableColumnValueSelector

Returns true if the primitive long, double, or float value returned by this selector should be treated as null. Users of BaseLongColumnValueSelector.getLong(), BaseDoubleColumnValueSelector.getDouble() and BaseFloatColumnValueSelector.getFloat() must check this method first, or else they may improperly use placeholder values returned by the primitive get methods. Users of BaseObjectColumnValueSelector.getObject() should not call this method. Instead, call "getObject" and check if it is null.

Specified by:

isNull in interface BaseNullableColumnValueSelector

inspectRuntimeShape

public void inspectRuntimeShape(RuntimeShapeInspector inspector)

Description copied from interface: HotLoopCallee

Implementations of this method should call inspector.visit() with all fields of this class, which meet two conditions: 1. They are used in methods of this class, annotated with CalledFromHotLoop 2. They are either: a. Nullable objects b. Instances of HotLoopCallee c. Objects, which don't always have a specific class in runtime. For example, a field of type Set could be HashSet or TreeSet in runtime, depending on how this instance (the instance on which inspectRuntimeShape() is called) is configured. d. ByteBuffer or similar objects, where byte order matters e. boolean flags, affecting branch taking f. Arrays of objects, meeting any of conditions a-e.

Specified by:

inspectRuntimeShape in interface HotLoopCallee