Package org.apache.spark.ml.param

Class Param<T>

Object

org.apache.spark.ml.param.Param<T>

Type Parameters:

T - param value type

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

BooleanParam, DoubleArrayArrayParam, DoubleArrayParam, DoubleParam, FloatParam, IntArrayParam, IntParam, LongParam, StringArrayParam

public class Param<T>
extends Object
implements Serializable

A param with self-contained documentation and optionally default value. Primitive-typed param should use the specialized versions, which are more friendly to Java users.

param: parent parent object param: name param name param: doc documentation param: isValid optional validation method which indicates if a value is valid. See ParamValidators for factory methods for common validation functions.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Param(String parent, String name, String doc)
Param(String parent, String name, String doc, scala.Function1<T,Object> isValid)
Param(Identifiable parent, String name, String doc)
Param(Identifiable parent, String name, String doc, scala.Function1<T,Object> isValid)

Method Summary

Modifier and Type	Method	Description
String	doc()
final boolean	equals(Object obj)
final int	hashCode()
scala.Function1<T,Object>	isValid()
T	jsonDecode(String json)	Decodes a param value from JSON.
String	jsonEncode(T value)	Encodes a param value into JSON, which can be decoded by `jsonDecode()`.
String	name()
String	parent()
final String	toString()
ParamPair<T>	w(T value)	Creates a param pair with the given value (for Java).

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

Param

public Param(String parent,
 String name,
 String doc,
 scala.Function1<T,Object> isValid)

Param

public Param(Identifiable parent,
 String name,
 String doc,
 scala.Function1<T,Object> isValid)

Param

public Param(String parent,
 String name,
 String doc)

Param

public Param(Identifiable parent,
 String name,
 String doc)

Method Details

parent

public String parent()

name

public String name()

doc

public String doc()

isValid

public scala.Function1<T,Object> isValid()

w

public ParamPair<T> w(T value)

Creates a param pair with the given value (for Java).

jsonEncode

public String jsonEncode(T value)

Encodes a param value into JSON, which can be decoded by `jsonDecode()`.

jsonDecode

public T jsonDecode(String json)

Decodes a param value from JSON.

toString

public final String toString()

Overrides:

toString in class Object

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

equals

public final boolean equals(Object obj)

Overrides:

equals in class Object