org.apache.mahout.common.parameters

Class AbstractParameter<T>

java.lang.Object

org.apache.mahout.common.parameters.AbstractParameter<T>

All Implemented Interfaces:

Parameter<T>, Parametered

Direct Known Subclasses:

ClassParameter, DoubleParameter, PathParameter

public abstract class AbstractParameter<T>
extends Object
implements Parameter<T>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.mahout.common.parameters.Parametered

Parametered.ParameteredGeneralizations

Field Summary

Fields inherited from interface org.apache.mahout.common.parameters.Parametered

log

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractParameter(Class<T> type, String prefix, String name, org.apache.hadoop.conf.Configuration jobConf, T defaultValue, String description)

Method Summary

Modifier and Type	Method and Description
void	configure(org.apache.hadoop.conf.Configuration jobConf)
void	createParameters(String prefix, org.apache.hadoop.conf.Configuration jobConf) EXPERT: consumers should never have to call this method.
String	defaultValue()
String	description()
T	get()
Collection<Parameter<?>>	getParameters()
String	getStringValue()
String	name()
String	prefix()
void	set(T value)
String	toString()
Class<T>	type()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.mahout.common.parameters.Parameter

setStringValue

Constructor Detail

AbstractParameter

protected AbstractParameter(Class<T> type,
                            String prefix,
                            String name,
                            org.apache.hadoop.conf.Configuration jobConf,
                            T defaultValue,
                            String description)

Method Detail

configure

public void configure(org.apache.hadoop.conf.Configuration jobConf)

Specified by:

configure in interface Parametered

createParameters

public void createParameters(String prefix,
                             org.apache.hadoop.conf.Configuration jobConf)

Description copied from interface: Parametered

EXPERT: consumers should never have to call this method. It would be friendly visible to Parametered.ParameteredGeneralizations if java supported it. Calling this method should create a new list of parameters and is called

Specified by:

createParameters in interface Parametered

Parameters:

prefix - ends with a dot if not empty.

jobConf - configuration used for retrieving values

See Also:

invoking method, invoking method

getStringValue

public String getStringValue()

Specified by:

getStringValue in interface Parameter<T>

Returns:

value string representation of current value

getParameters

public Collection<Parameter<?>> getParameters()

Specified by:

getParameters in interface Parametered

prefix

public String prefix()

Specified by:

prefix in interface Parameter<T>

Returns:

job configuration setting key prefix, e.g. 'org.apache.mahout.util.WeightedDistanceMeasure.'

name

public String name()

Specified by:

name in interface Parameter<T>

Returns:

configuration parameters name, e.g. 'weightsFile'

description

public String description()

Specified by:

description in interface Parameter<T>

Returns:

human readable description of parameters

type

public Class<T> type()

Specified by:

type in interface Parameter<T>

Returns:

value class type

defaultValue

public String defaultValue()

Specified by:

defaultValue in interface Parameter<T>

Returns:

value used if not set by consumer

get

public T get()

Specified by:

get in interface Parameter<T>

Returns:

current parameters value

set

public void set(T value)

Specified by:

set in interface Parameter<T>

Parameters:

value - new parameters value

toString

public String toString()

Overrides:

toString in class Object