Package com.linkedin.feathr.common.tensor

Class DimensionType

java.lang.Object

com.linkedin.feathr.common.tensor.DimensionType

All Implemented Interfaces:

Representable, Serializable

Direct Known Subclasses:

PrimitiveDimensionType

public abstract class DimensionType
extends Object
implements Serializable, Representable

Base type for all the dimension types.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DUMMY_NAME	dummy name for dimensionTypes that have not define name
static final String	OUT_OF_VOCAB	The reported string value for values out of the mapping for the dimension.
static final int	UNKNOWN_SHAPE	The reported shape when there is no explicit knowledge other than the underlying primitive type.

Constructor Summary

Constructors

Constructor	Description
DimensionType()

Method Summary

Modifier and Type	Method	Description
Object	getDimensionValue(ReadableTuple tuple, int column)	The inverse of setDimensionValue(com.linkedin.feathr.common.tensor.WriteableTuple, int, java.lang.Object).
String	getName()	Get the name of the DimensionType
int	getShape()	Get the shape.
String	indexToString(long index)	Deprecated. Use getDimensionValue(ReadableTuple, int) instead
void	setDimensionValue(WriteableTuple target, int column, Object dimensionValue)	Sets a dimension in a particular column of a target tuple.
long	stringToIndex(String string)	Deprecated. Use setDimensionValue(WriteableTuple, int, Object) instead

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.Representable

getRepresentation

Field Details

UNKNOWN_SHAPE

public static final int UNKNOWN_SHAPE

The reported shape when there is no explicit knowledge other than the underlying primitive type.

See Also:

• Constant Field Values

DUMMY_NAME

public static final String DUMMY_NAME

dummy name for dimensionTypes that have not define name

See Also:

• Constant Field Values

OUT_OF_VOCAB

public static final String OUT_OF_VOCAB

The reported string value for values out of the mapping for the dimension.

See Also:

• Constant Field Values

Constructor Details

DimensionType

public DimensionType()

Method Details

setDimensionValue

public void setDimensionValue(WriteableTuple target,
 int column,
 Object dimensionValue)

Sets a dimension in a particular column of a target tuple. For primitive dimensions, implementations will just copy the value over. (This is the default behavior.) For high-level semantic dimensions that maintain a different set of "outward-facing" and "internal" representations of the dimension values, implementations will apply any necessary translation on the input dimensionValue before inserting into the tuple.

Parameters:

target - the destination where the dimension value should be set. Hint: This will often be a com.linkedin.feathr.common.TensorBuilder

column - the column number of the target tuple to be set

dimensionValue - the value of the dimension

Throws:

RuntimeException - will be thrown if value is not valid for this dimension

getDimensionValue

public Object getDimensionValue(ReadableTuple tuple,
 int column)

The inverse of setDimensionValue(com.linkedin.feathr.common.tensor.WriteableTuple, int, java.lang.Object). Reads a dimension from a particular column of a tuple.

Parameters:

tuple - the tuple from which to read. Hint: This will often be a TensorIterator

column - the column to read from the tuple

Returns:

the value of the dimension

getShape

public int getShape()

Get the shape.

Returns:

the shape - the number of maximum possible unique values in this dimension. Can be UNKNOWN_SHAPE.

getName

public String getName()

Get the name of the DimensionType

Returns:

the name

indexToString

@Deprecated
public String indexToString(long index)

Deprecated.

Use getDimensionValue(ReadableTuple, int) instead

Convert a numeric index to a string representation.

Parameters:

index - the numeric index. 0 is reserved for out-of-vocab.

Returns:

the string representation

stringToIndex

@Deprecated
public long stringToIndex(String string)

Deprecated.

Use setDimensionValue(WriteableTuple, int, Object) instead

Convert a string representation to a numeric index.

Parameters:

string - the string representation

Returns:

the numeric index. Categoricals return 0 if out-of-vocab, others will throw unchecked exceptions.