Package org.apache.druid.frame.field

Class DoubleFieldReader

java.lang.Object

org.apache.druid.frame.field.NumericFieldReader

org.apache.druid.frame.field.DoubleFieldReader

All Implemented Interfaces:

FieldReader

public class DoubleFieldReader
extends NumericFieldReader

Reads the values produced by DoubleFieldWriter

See Also:

DoubleFieldWriter, for the details of the byte-format that it expects for reading

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.druid.frame.field.NumericFieldReader

NumericFieldReader.Selector

Method Summary

Modifier and Type	Method	Description
static DoubleFieldReader	forArray()
static DoubleFieldReader	forPrimitive()
ColumnValueSelector<?>	getColumnValueSelector(org.apache.datasketches.memory.Memory memory, ReadableFieldPointer fieldPointer, byte nullIndicatorByte)	Creates a column value selector for the element written at fieldPointer's position in the memory.
ValueType	getValueType()	ValueType of the inheritor's element

Methods inherited from class org.apache.druid.frame.field.NumericFieldReader

isComparable, isNull, makeColumnValueSelector, makeDimensionSelector

Methods inherited from class java.lang.Object

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

Method Detail

forPrimitive

public static DoubleFieldReader forPrimitive()

forArray

public static DoubleFieldReader forArray()

getValueType

public ValueType getValueType()

Description copied from class: NumericFieldReader

ValueType of the inheritor's element

Specified by:

getValueType in class NumericFieldReader

getColumnValueSelector

public ColumnValueSelector<?> getColumnValueSelector(org.apache.datasketches.memory.Memory memory,
                                                     ReadableFieldPointer fieldPointer,
                                                     byte nullIndicatorByte)

Description copied from class: NumericFieldReader

Creates a column value selector for the element written at fieldPointer's position in the memory. The nullilty check is handled by the nullIndicatorByte

Specified by:

getColumnValueSelector in class NumericFieldReader