Uses of Class
org.apache.sysds.runtime.compress.colgroup.ColGroup

Packages that use ColGroup

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

Uses of ColGroup in org.apache.sysds.runtime.compress

Methods in org.apache.sysds.runtime.compress that return types with arguments of type ColGroup

Modifier and Type	Method and Description
List<ColGroup>	CompressedMatrixBlock.getColGroups()

Method parameters in org.apache.sysds.runtime.compress with type arguments of type ColGroup

Modifier and Type	Method and Description
void	CompressedMatrixBlock.allocateColGroupList(List<ColGroup> colGroups)
void	CompressionStatistics.setColGroupsCounts(List<ColGroup> colGroups) Set array of counts regarding col group types.

Uses of ColGroup in org.apache.sysds.runtime.compress.colgroup

Subclasses of ColGroup in org.apache.sysds.runtime.compress.colgroup

Modifier and Type	Class and Description
class	ColGroupDDC Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC).
class	ColGroupDDC1 Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC) using 1 byte codes.
class	ColGroupDDC2 Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC) using 2 byte codes.
class	ColGroupOffset Base class for column groups encoded with various types of bitmap encoding.
class	ColGroupOLE Class to encapsulate information about a column group that is encoded with simple lists of offsets for each set of distinct values.
class	ColGroupRLE A group of columns compressed with a single run-length encoded bitmap.
class	ColGroupUncompressed Column group type for columns that are stored as dense arrays of doubles.
class	ColGroupValue Base class for column groups encoded with value dictionary.

Methods in org.apache.sysds.runtime.compress.colgroup that return ColGroup

Modifier and Type	Method and Description
static ColGroup	ColGroupFactory.compress(int[] colIndexes, int rlen, ABitmap ubm, ColGroup.CompressionType compType, CompressionSettings cs, MatrixBlock rawMatrixBlock) Method for compressing an ColGroup.
static ColGroup[]	ColGroupFactory.compressColGroups(MatrixBlock in, HashMap<Integer,Double> compRatios, List<int[]> groups, CompressionSettings compSettings, int k) The actual compression method, that handles the logic of compressing multiple columns together.
static ColGroup	ColGroupConverter.copyColGroup(ColGroup group) Copy col group instance with deep copy of column indices but shallow copy of actual contents;
ColGroup	ColGroupRLE.scalarOperation(ScalarOperator op)
ColGroup	ColGroupDDC1.scalarOperation(ScalarOperator op)
abstract ColGroup	ColGroup.scalarOperation(ScalarOperator op) Perform the specified scalar operation directly on the compressed column group, without decompressing individual cells if possible.
ColGroup	ColGroupUncompressed.scalarOperation(ScalarOperator op)
ColGroup	ColGroupDDC2.scalarOperation(ScalarOperator op)
ColGroup	ColGroupOLE.scalarOperation(ScalarOperator op)

Methods in org.apache.sysds.runtime.compress.colgroup that return types with arguments of type ColGroup

Modifier and Type	Method and Description
static List<ColGroup>	ColGroupFactory.assignColumns(int numCols, ColGroup[] colGroups, MatrixBlock rawBlock, CompressionSettings compSettings) Method for producing the final ColGroupList stored inside the CompressedMatrixBlock.
static List<ColGroup>	ColGroupIO.readGroups(DataInput in) Read groups from a file.

Methods in org.apache.sysds.runtime.compress.colgroup with parameters of type ColGroup

Modifier and Type	Method and Description
static List<ColGroup>	ColGroupFactory.assignColumns(int numCols, ColGroup[] colGroups, MatrixBlock rawBlock, CompressionSettings compSettings) Method for producing the final ColGroupList stored inside the CompressedMatrixBlock.
static ColGroup	ColGroupConverter.copyColGroup(ColGroup group) Copy col group instance with deep copy of column indices but shallow copy of actual contents;
static MatrixBlock	ColGroupConverter.getUncompressedColBlock(ColGroup group) Extracts the Uncompressed MatrixBlock representation of a Col Group

Method parameters in org.apache.sysds.runtime.compress.colgroup with type arguments of type ColGroup

Modifier and Type	Method and Description
static void	ColGroupIO.writeGroups(DataOutput out, List<ColGroup> colGroups) Writes the ColGroups out to the DataOutput.

Constructor parameters in org.apache.sysds.runtime.compress.colgroup with type arguments of type ColGroup

Constructor and Description
DenseRowIterator(int rl, int ru, List<ColGroup> colGroups, int clen)
SparseRowIterator(int rl, int ru, List<ColGroup> colGroups, int clen)

Uses of ColGroup in org.apache.sysds.runtime.compress.utils

Constructor parameters in org.apache.sysds.runtime.compress.utils with type arguments of type ColGroup

Constructor and Description
ColumnGroupIterator(int rl, int ru, int cgl, int cgu, boolean inclZeros, List<ColGroup> colGroups)