com.linkedin.feathr.common.tensor

Class LOLTensorData

java.lang.Object

com.linkedin.feathr.common.tensor.LOLTensorData

All Implemented Interfaces:

TensorData

public class LOLTensorData
extends java.lang.Object
implements TensorData

Each list is of the same length and stores a single dimension (similarly to parallel arrays). There are as many dimensions as elements in columnTypes minus one. columnTypes describe the primitive type of the corresponding column (a dimension or a value). Instances of this class are expected to be only constructed from existing lists (e.g., from Avro or Pegasus), so no corresponding builder class is provided.

Constructor Summary

Constructors

Constructor and Description
LOLTensorData(Representable[] columnTypes, java.util.List<java.util.List<?>> dimensions, java.util.List<?> values)
LOLTensorData(Representable[] columnTypes, java.util.List<java.util.List<?>> dimensions, java.util.List<?> values, boolean sort)

Method Summary

Modifier and Type	Method and Description
int	cardinality()
int	estimatedCardinality()
java.util.List<java.util.List<?>>	getDimensions()
Representable[]	getTypes()
java.util.List<?>	getValues()
boolean	isEmpty()
TensorIterator	iterator()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.linkedin.feathr.common.tensor.TensorData

getArity, getShape

Constructor Detail

LOLTensorData

public LOLTensorData(Representable[] columnTypes,
                     java.util.List<java.util.List<?>> dimensions,
                     java.util.List<?> values,
                     boolean sort)

LOLTensorData

public LOLTensorData(Representable[] columnTypes,
                     java.util.List<java.util.List<?>> dimensions,
                     java.util.List<?> values)

Method Detail

getTypes

public Representable[] getTypes()

Specified by:

getTypes in interface TensorData

Returns:

the types of all dimensions and the value as a single array.

estimatedCardinality

public int estimatedCardinality()

Specified by:

estimatedCardinality in interface TensorData

Returns:

conservative estimate of number of entries in the mapping from dimensions to values. Can be cheaper to evaluate than the exact one.

cardinality

public int cardinality()

Specified by:

cardinality in interface TensorData

Returns:

exact number of entries in the mapping from dimensions to values.

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface TensorData

iterator

public TensorIterator iterator()

Specified by:

iterator in interface TensorData

Returns:

an iterator over entries in the mapping from dimensions to the value.

getDimensions

public java.util.List<java.util.List<?>> getDimensions()

getValues

public java.util.List<?> getValues()