Package com.linkedin.feathr.common

Class Hasher

java.lang.Object

com.linkedin.feathr.common.Hasher

public class Hasher
extends Object

Generate hash for a tensor based on column types and values stored in the tensor. This hash should be same for all tensor instances with same column types and values even if they are implemented differently under the hood.

Field Summary

Fields

Modifier and Type	Field	Description
static final Hasher	INSTANCE

Constructor Summary

Constructors

Constructor	Description
Hasher()

Method Summary

Modifier and Type	Method	Description
int	apply(TensorData tensorData, boolean dimOnly)	Get hash for tensorData optionally excluding value columns
static int	getHash(ReadableTuple readableTuple, int numCols)

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final Hasher INSTANCE

Constructor Details

Hasher

public Hasher()

Method Details

apply

public int apply(TensorData tensorData,
 boolean dimOnly)

Get hash for tensorData optionally excluding value columns

Parameters:

tensorData - input tensorData for hash is to be computed

dimOnly - if true, only dimensions (non-value columns) are use in computation

Returns:

hash for the tensor

getHash

public static int getHash(ReadableTuple readableTuple,
 int numCols)