Package org.apache.sysds.runtime.compress.colgroup

Class Summary

Class	Description
ADictionary	This dictionary class aims to encapsulate the storage and operations over unique floating point values of a column group.
ColGroup	Class that stores information about a column group within a compressed matrix block.
ColGroupConverter	Utility functions for ColGroup to convert ColGroups or MatrixBlocks.
ColGroupDDC	Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC).
ColGroupDDC1	Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC) using 1 byte codes.
ColGroupDDC2	Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC) using 2 byte codes.
ColGroupFactory	Factory pattern for constructing ColGroups.
ColGroupIO	This has the IO responsibility of ColGroups, such that it enables to read and write ColGroups to and from a DataInput and DataOutput
ColGroupOffset	Base class for column groups encoded with various types of bitmap encoding.
ColGroupOLE	Class to encapsulate information about a column group that is encoded with simple lists of offsets for each set of distinct values.
ColGroupRLE	A group of columns compressed with a single run-length encoded bitmap.
ColGroupSizes
ColGroupUncompressed	Column group type for columns that are stored as dense arrays of doubles.
ColGroupValue	Base class for column groups encoded with value dictionary.
DenseRowIterator
Dictionary	This dictionary class aims to encapsulate the storage and operations over unique floating point values of a column group.
QDictionary	This dictionary class aims to encapsulate the storage and operations over unique floating point values of a column group.
SparseRowIterator

Enum Summary

Enum	Description
ColGroup.CompressionType	Public Group types supported Note For instance DDC is called DDC not DDC1, or DDC2 which is a specific subtype of the DDC.