org.apache.sysds.runtime.compress.utils

Class CustomHashMap

java.lang.Object

org.apache.sysds.runtime.compress.utils.CustomHashMap

Direct Known Subclasses:

DblArrayIntListHashMap, DoubleIntListHashMap

public abstract class CustomHashMap
extends Object

This class provides a memory-efficient base for Custom HashMaps for restricted use cases.

Constructor Summary

Constructors

Constructor and Description
CustomHashMap()

Method Summary

Modifier and Type	Method and Description
CustomHashMap	joinHashMap(CustomHashMap that)
static CustomHashMap[]	joinHashMaps(CustomHashMap[] left, CustomHashMap[] right) Joins the two lists of hashmaps together to form one list containing element wise joins of the hashmaps.
int	size()

Methods inherited from class java.lang.Object

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

Constructor Detail

CustomHashMap

public CustomHashMap()

Method Detail

size

public int size()

joinHashMaps

public static CustomHashMap[] joinHashMaps(CustomHashMap[] left,
                                           CustomHashMap[] right)

Joins the two lists of hashmaps together to form one list containing element wise joins of the hashmaps. Also note that the join modifies the left hand side hash map such that it contains the joined values. All values in the right hand side is appended to the left hand side, such that the order of the elements is constant after the join.

Parameters:

left - The left side hashmaps

right - The right side hashmaps

Returns:

The element-wise join of the two hashmaps.

joinHashMap

public CustomHashMap joinHashMap(CustomHashMap that)