org.apache.druid.segment.serde

Class NoIndexesColumnIndexSupplier

java.lang.Object

org.apache.druid.segment.serde.NoIndexesColumnIndexSupplier

All Implemented Interfaces:

ColumnIndexSupplier

public class NoIndexesColumnIndexSupplier
extends Object
implements ColumnIndexSupplier

Default implementation of ColumnIndexSupplier for columns which do not have any indexes.

Constructor Summary

Constructors

Constructor and Description
NoIndexesColumnIndexSupplier()

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

NoIndexesColumnIndexSupplier

public NoIndexesColumnIndexSupplier()

Method Detail

getInstance

public static NoIndexesColumnIndexSupplier getInstance()

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