Class IncrementalIndexRowHolder
- java.lang.Object
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- org.apache.druid.segment.incremental.IncrementalIndexRowHolder
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- All Implemented Interfaces:
HotLoopCallee
,BaseDoubleColumnValueSelector
,BaseFloatColumnValueSelector
,BaseLongColumnValueSelector
,BaseNullableColumnValueSelector
,BaseObjectColumnValueSelector<Long>
,ColumnValueSelector<Long>
,LongColumnSelector
public class IncrementalIndexRowHolder extends Object implements LongColumnSelector
IncrementalIndexRowHolder is a simpleget()
/set(org.apache.druid.segment.incremental.IncrementalIndexRow)
holder ofIncrementalIndexRow
. It is used to implement various machinery aroundIncrementalIndex
, e. g.IncrementalIndexColumnSelectorFactory
,IncrementalIndexRowIterator
, etc. By implementingLongColumnSelector
, IncrementalIndexRowHolder plays the role of timestamp column selector, to avoid unneeded level of indirection when timestamp column is selected inColumnSelectorFactory.makeColumnValueSelector(String)
.
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Field Summary
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Fields inherited from interface org.apache.druid.segment.ColumnValueSelector
EMPTY_ARRAY
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Constructor Summary
Constructors Constructor Description IncrementalIndexRowHolder()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description IncrementalIndexRow
get()
long
getLong()
void
inspectRuntimeShape(RuntimeShapeInspector inspector)
Implementations of this method should callinspector.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)
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.druid.segment.LongColumnSelector
classOfObject, getDouble, getFloat, getObject
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Method Detail
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get
public IncrementalIndexRow get()
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set
public void set(IncrementalIndexRow currEntry)
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getLong
public long getLong()
- Specified by:
getLong
in interfaceBaseLongColumnValueSelector
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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 ofBaseLongColumnValueSelector.getLong()
,BaseDoubleColumnValueSelector.getDouble()
andBaseFloatColumnValueSelector.getFloat()
must check this method first, or else they may improperly use placeholder values returned by the primitive get methods. Users ofBaseObjectColumnValueSelector.getObject()
should not call this method. Instead, call "getObject" and check if it is null.- Specified by:
isNull
in interfaceBaseNullableColumnValueSelector
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inspectRuntimeShape
public void inspectRuntimeShape(RuntimeShapeInspector inspector)
Description copied from interface:HotLoopCallee
Implementations of this method should callinspector.visit()
with all fields of this class, which meet two conditions: 1. They are used in methods of this class, annotated withCalledFromHotLoop
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 typeSet
could beHashSet
orTreeSet
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 interfaceHotLoopCallee
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