org.apache.druid.segment.serde

Class NullValueIndexSupplier

java.lang.Object

org.apache.druid.segment.serde.NullValueIndexSupplier

All Implemented Interfaces:

ColumnIndexSupplier

public class NullValueIndexSupplier
extends Object
implements ColumnIndexSupplier

ColumnIndexSupplier for columns which only have an ImmutableBitmap to indicate which rows only have null values, such as LongNumericColumnPartSerdeV2, DoubleNumericColumnPartSerdeV2, and FloatNumericColumnPartSerdeV2.

Constructor Summary

Constructors

Constructor and Description
NullValueIndexSupplier(ImmutableBitmap nullValueBitmap)

Method Summary

Modifier and Type	Method and Description
<T> T	as(Class<T> clazz) Try to get a column 'index' of the specified type.

Methods inherited from class java.lang.Object

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

Constructor Detail

NullValueIndexSupplier

public NullValueIndexSupplier(ImmutableBitmap nullValueBitmap)

Method Detail

as

@Nullable
public <T> T as(Class<T> clazz)

Description copied from interface: ColumnIndexSupplier

Try to get a column 'index' of the specified type. If the index of the desired type is not available, this method will return null. If the value is non-null, the index may be used for the eventual construction of an Offset to form the basis of a Cursor (or VectorOffset and VectorCursor) which can greatly reduce the total number of rows which need to be scanned and processed. Objects returned by this method are not thread-safe.

Specified by:

as in interface ColumnIndexSupplier