EmptyEncoding (Apache SystemDS 3.0.0 API)

java.lang.Object
- org.apache.sysds.runtime.compress.estim.encoding.EmptyEncoding

All Implemented Interfaces:

IEncode
```
public class EmptyEncoding
extends Object
implements IEncode
```
Empty encoding for cases where the entire group of columns is zero

Field Summary
- Fields inherited from interface org.apache.sysds.runtime.compress.estim.encoding.IEncode
  LOG

Constructor Summary

Constructors
Constructor Description

EmptyEncoding()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`IEncode`	`combine(IEncode e)`	Combine two encodings, note it should be guaranteed by the caller that the number of unique multiplied does not overflow Integer.
`EstimationFactors`	`extractFacts(int[] cols, int nRows, double tupleSparsity, double matrixSparsity)`
`int`	`getUnique()`
`boolean`	`isDense()`	Signify if the counts are including zero or without zero.
`String`	`toString()`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - EmptyEncoding
```
public EmptyEncoding()
```
- Method Detail
  - combine
```
public IEncode combine(IEncode e)
```
    Description copied from interface: IEncode
    
    Combine two encodings, note it should be guaranteed by the caller that the number of unique multiplied does not overflow Integer.
    
    Specified by:
    
    combine in interface IEncode
    
    Parameters:
    
    e - The other side to combine with
    
    Returns:
    
    The combined encoding
  - getUnique
```
public int getUnique()
```
    Specified by:
    
    getUnique in interface IEncode
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - extractFacts
```
public EstimationFactors extractFacts(int[] cols,
                                      int nRows,
                                      double tupleSparsity,
                                      double matrixSparsity)
```
    Specified by:
    
    extractFacts in interface IEncode
  - isDense
```
public boolean isDense()
```
    Description copied from interface: IEncode
    
    Signify if the counts are including zero or without zero.
    
    Specified by:
    
    isDense in interface IEncode
    
    Returns:
    
    is dense