Package org.apache.druid.frame.field

Class NumericFieldReader.Selector

java.lang.Object

org.apache.druid.frame.field.NumericFieldReader.Selector

Enclosing class:

NumericFieldReader

public abstract static class NumericFieldReader.Selector
extends Object

Helper class which allows the inheritors to fetch the nullity of the field located at fieldPointer's position in the dataRegion.

The implementations of the column value selectors returned by the NumericFieldReader.getColumnValueSelector(org.apache.datasketches.memory.Memory, org.apache.druid.frame.field.ReadableFieldPointer, byte) can inherit this class and call _isNull() in their BaseNullableColumnValueSelector.isNull() to offload the responsibility of detecting null elements to this Selector, instead of reworking the null handling

Constructor Summary

Constructors

Constructor	Description
Selector(org.apache.datasketches.memory.Memory dataRegion, ReadableFieldPointer fieldPointer, byte nullIndicatorByte)

Method Summary

Modifier and Type	Method	Description
protected boolean	_isNull()

Methods inherited from class java.lang.Object

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

Constructor Details

Selector

public Selector(org.apache.datasketches.memory.Memory dataRegion,
 ReadableFieldPointer fieldPointer,
 byte nullIndicatorByte)

Method Details

_isNull

protected boolean _isNull()