Package org.apache.druid.frame.field

Class NumericArrayFieldReader

java.lang.Object

org.apache.druid.frame.field.NumericArrayFieldReader

All Implemented Interfaces:

FieldReader

Direct Known Subclasses:

DoubleArrayFieldReader, FloatArrayFieldReader, LongArrayFieldReader

public abstract class NumericArrayFieldReader
extends Object
implements FieldReader

Reader class for the fields written by NumericArrayFieldWriter. See the Javadoc for the writer for more information on the format The numeric array fields are byte comparable

Constructor Summary

Constructors

Constructor	Description
NumericArrayFieldReader()

Method Summary

Modifier and Type	Method	Description
boolean	isComparable()	Whether this field is comparable.
boolean	isNull(org.apache.datasketches.memory.Memory memory, long position)	Whether the provided memory position points to a null value.
DimensionSelector	makeDimensionSelector(org.apache.datasketches.memory.Memory memory, ReadableFieldPointer fieldPointer, ExtractionFn extractionFn)	Create a DimensionSelector backed by some memory and a moveable pointer.

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.frame.field.FieldReader

makeColumnValueSelector

Constructor Detail

NumericArrayFieldReader

public NumericArrayFieldReader()

Method Detail

makeDimensionSelector

public DimensionSelector makeDimensionSelector(org.apache.datasketches.memory.Memory memory,
                                               ReadableFieldPointer fieldPointer,
                                               @Nullable
                                               ExtractionFn extractionFn)

Description copied from interface: FieldReader

Create a DimensionSelector backed by some memory and a moveable pointer.

Specified by:

makeDimensionSelector in interface FieldReader

isNull

public boolean isNull(org.apache.datasketches.memory.Memory memory,
                      long position)

Description copied from interface: FieldReader

Whether the provided memory position points to a null value.

Specified by:

isNull in interface FieldReader

isComparable

public boolean isComparable()

Description copied from interface: FieldReader

Whether this field is comparable. Comparable fields can be compared as unsigned bytes.

Specified by:

isComparable in interface FieldReader