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

Class MapToBit

java.lang.Object

org.apache.sysds.runtime.compress.colgroup.mapping.AMapToData

org.apache.sysds.runtime.compress.colgroup.mapping.MapToBit

All Implemented Interfaces:

Serializable

public class MapToBit
extends AMapToData

A Bit map containing the values of the map inside a long array. By convention inside the indexes are from the right most bit. so for instance index 0 is the left most bit in the first long and index 63 is the leftmost bit in the first long. Similarly 64 is the right most bit in the second long. and so on.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
MapToBit(int unique, int size)	A Bit map containing the values of the map inside a long array.

Method Summary

Modifier and Type	Method	Description
AMapToData	append(AMapToData t)
AMapToData	appendN(IMapToDataGroup[] d)
void	copy(AMapToData d)	Copy the values in this map into another mapping object.
void	copyBit(BitSet d)
void	copyInt(int[] d)
int	countRuns()	Count the number of runs inside the map.
boolean	equals(AMapToData e)	Indicate if the given encoding is equivalent to this encoding
void	fill(int v)	Fill the map with a given value.
int[]	getCounts(int[] ret)	Get the number of counts of each unique value contained in this map.
long	getExactSizeOnDisk()	Get the size of this Mapping object on disk.
int	getIndex(int n)	Get the given index back as a integer
long	getInMemorySize()	Get the in memory size of this Mapping object.
static long	getInMemorySize(int dataLength)
int	getMaxPossible()	Get the maximum possible value to encode in this encoding.
MapToFactory.MAP_TYPE	getType()
int	getUpperBoundValue()	Get the maximum value that is possible to allocate inside this map.
boolean	isEmpty()
void	preAggregateDDC_DDCMultiCol(AMapToData tm, IDictionary td, double[] v, int nCol)
void	preAggregateDDC_DDCSingleCol(AMapToData tm, double[] td, double[] v)
void	replace(int v, int r)	Replace v with r for all entries, NOTE! It is assumed that you call this correctly: - with two distinct values that is representable inside the given AMapToData.
AMapToData	resize(int unique)
void	set(int n, int v)	Set the index to the value.
int	setAndGet(int n, int v)	Set the index to the value and get the contained value after.
int	size()	The size of the Mapping object, signaling how many value cells are stored in this mapping object.
AMapToData	slice(int l, int u)	Slice out the range from lower to upper from this map toData.
String	toString()
void	write(DataOutput out)	Serialize this object to the DataOutput given.

Methods inherited from class org.apache.sysds.runtime.compress.colgroup.mapping.AMapToData

countRuns, equals, getCounts, getMax, getUnique, preAggregateDDC_DDC, preAggregateDDC_RLE, preAggregateDDC_SDCZ, preAggregateDDC_SDCZMultiCol, preAggregateDDC_SDCZSingleCol, preAggregateDense, preAggregateDense, preAggregateRLE_DDC, preAggregateSDCZ_DDC, preAggregateSDCZ_SDCZ, preAggregateSparse, preAggregateSparse, set, set, setUnique, verify

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MapToBit

public MapToBit(int unique,
                int size)

A Bit map containing the values of the map inside a long array. By convention inside the indexes are from the right most bit. so for instance index 0 is the left most bit in the first long and index 63 is the leftmost bit in the first long. Similarly 64 is the right most bit in the second long. and so on.

Parameters:

unique - the number of unique values to encode ... is basically always 2 in this case

size - The size to allocate, as in number of bits to enable encoding not the number of longs to allocate.

Method Detail

getType

public MapToFactory.MAP_TYPE getType()

Specified by:

getType in class AMapToData

getIndex

public int getIndex(int n)

Description copied from class: AMapToData

Get the given index back as a integer

Specified by:

getIndex in class AMapToData

Parameters:

n - the index to get

Returns:

the value represented in that cell as integer

fill

public void fill(int v)

Description copied from class: AMapToData

Fill the map with a given value. NOTE! The value should be representable inside the map. This requirement is not checked.

Specified by:

fill in class AMapToData

Parameters:

v - the value to fill

getInMemorySize

public long getInMemorySize()

Description copied from class: AMapToData

Get the in memory size of this Mapping object.

Specified by:

getInMemorySize in class AMapToData

Returns:

The size in Bytes.

getInMemorySize

public static long getInMemorySize(int dataLength)

set

public void set(int n,
                int v)

Description copied from class: AMapToData

Set the index to the value. NOTE! The value should be representable inside the map. This requirement is not checked.

Specified by:

set in class AMapToData

Parameters:

n - index to set.

v - the value to set it to.

setAndGet

public int setAndGet(int n,
                     int v)

Description copied from class: AMapToData

Set the index to the value and get the contained value after.

Specified by:

setAndGet in class AMapToData

Parameters:

n - index to set.

v - the value to set it to.

Returns:

v as encoded, note this value can be different that the one put in if the map is not able to represent the value

size

public int size()

Description copied from class: AMapToData

The size of the Mapping object, signaling how many value cells are stored in this mapping object.

Specified by:

size in class AMapToData

Returns:

The length of the mapping object.

replace

public void replace(int v,
                    int r)

Description copied from class: AMapToData

Replace v with r for all entries, NOTE! It is assumed that you call this correctly: - with two distinct values that is representable inside the given AMapToData.

Specified by:

replace in class AMapToData

Parameters:

v - The value to replace

r - The value to put instead

getExactSizeOnDisk

public long getExactSizeOnDisk()

Description copied from class: AMapToData

Get the size of this Mapping object on disk.

Specified by:

getExactSizeOnDisk in class AMapToData

Returns:

The on disk size in Bytes.

write

public void write(DataOutput out)
           throws IOException

Description copied from class: AMapToData

Serialize this object to the DataOutput given.

Specified by:

write in class AMapToData

Parameters:

out - The object to serialize this object into.

Throws:

IOException - An IO exception if the Serialization fails.

getUpperBoundValue

public int getUpperBoundValue()

Description copied from class: AMapToData

Get the maximum value that is possible to allocate inside this map.

Specified by:

getUpperBoundValue in class AMapToData

Returns:

The maximum value.

getCounts

public int[] getCounts(int[] ret)

Description copied from class: AMapToData

Get the number of counts of each unique value contained in this map. Note that in the case the mapping is shorter than number of rows the counts sum to the number of mapped values not the number of rows.

Specified by:

getCounts in class AMapToData

Parameters:

ret - The object to return.

Returns:

The counts

preAggregateDDC_DDCSingleCol

public void preAggregateDDC_DDCSingleCol(AMapToData tm,
                                         double[] td,
                                         double[] v)

preAggregateDDC_DDCMultiCol

public void preAggregateDDC_DDCMultiCol(AMapToData tm,
                                        IDictionary td,
                                        double[] v,
                                        int nCol)

isEmpty

public boolean isEmpty()

copy

public void copy(AMapToData d)

Description copied from class: AMapToData

Copy the values in this map into another mapping object. NOTE! All contained vales should be representable inside the map given. This requirement is not checked.

Overrides:

copy in class AMapToData

Parameters:

d - Map to copy all values into.

copyInt

public void copyInt(int[] d)

Specified by:

copyInt in class AMapToData

copyBit

public void copyBit(BitSet d)

Specified by:

copyBit in class AMapToData

resize

public AMapToData resize(int unique)

Specified by:

resize in class AMapToData

countRuns

public int countRuns()

Description copied from class: AMapToData

Count the number of runs inside the map.

Specified by:

countRuns in class AMapToData

Returns:

The number of runs

slice

public AMapToData slice(int l,
                        int u)

Description copied from class: AMapToData

Slice out the range from lower to upper from this map toData.

Specified by:

slice in class AMapToData

Parameters:

l - Low value to slice from

u - high value to slice to (not inclusive)

Returns:

A new map containing only the values from the range.

append

public AMapToData append(AMapToData t)

Specified by:

append in class AMapToData

equals

public boolean equals(AMapToData e)

Description copied from class: AMapToData

Indicate if the given encoding is equivalent to this encoding

Specified by:

equals in class AMapToData

Parameters:

e - The other encoding to be compared with this

Returns:

If the encoding is equivalent

appendN

public AMapToData appendN(IMapToDataGroup[] d)

Specified by:

appendN in class AMapToData

getMaxPossible

public int getMaxPossible()

Description copied from class: AMapToData

Get the maximum possible value to encode in this encoding. For instance in a bit you can encode 2 values

Specified by:

getMaxPossible in class AMapToData

Returns:

The maximum number of distinct values to encode

toString

public String toString()

Overrides:

toString in class AMapToData