de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization

Class ChainedParameterization

java.lang.Object

de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.AbstractParameterization

de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.ChainedParameterization

All Implemented Interfaces:

Parameterization

public class ChainedParameterization
extends AbstractParameterization

Class that allows chaining multiple parameterizations. This is designed to allow overriding of some parameters for an algorithm, while other can be configured via different means, e.g. given by the user on the command line. See de.lmu.ifi.dbs.elki.utilities.optionhandling package documentation for examples.

Since:

0.3

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.List<Parameterization>	chain Keep the list of parameterizations.
private Parameterization	errorTarget Error target

Fields inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.AbstractParameterization

errors

Constructor Summary

Constructors

Constructor and Description
ChainedParameterization(Parameterization... ps) Constructor that takes a number of Parameterizations to chain.

Method Summary

Modifier and Type	Method and Description
void	appendParameterization(Parameterization p) Append a new Parameterization to the chain.
Parameterization	descend(java.lang.Object option) Descend parameterization tree into sub-option.
void	errorsTo(Parameterization config) Set the error target, since there is no unique way where errors can be reported.
boolean	hasUnusedParameters() Check for unused parameters
void	reportError(ParameterException e) Report a configuration error.
boolean	setValueForOption(Parameter<?> opt) Assign a value for an option, but not using default values and throwing exceptions on error.

Methods inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.AbstractParameterization

clearErrors, failOnErrors, finalize, getErrors, logAndClearReportedErrors

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.Parameterization

grab, hasErrors, tryInstantiate

Field Detail

chain

private java.util.List<Parameterization> chain

Keep the list of parameterizations.

errorTarget

private Parameterization errorTarget

Error target

Constructor Detail

ChainedParameterization

public ChainedParameterization(Parameterization... ps)

Constructor that takes a number of Parameterizations to chain.

Parameters:

ps - Parameterizations

Method Detail

appendParameterization

public void appendParameterization(Parameterization p)

Append a new Parameterization to the chain.

Parameters:

p - Parameterization

setValueForOption

public boolean setValueForOption(Parameter<?> opt)
                          throws ParameterException

Description copied from interface: Parameterization

Assign a value for an option, but not using default values and throwing exceptions on error.

Parameters:

opt - Parameter to set

Returns:

Success code

Throws:

ParameterException - on assignment errors.

hasUnusedParameters

public boolean hasUnusedParameters()

Description copied from interface: Parameterization

Check for unused parameters

Returns:

true if at least one parameter was not consumed

errorsTo

public void errorsTo(Parameterization config)

Set the error target, since there is no unique way where errors can be reported.

Parameters:

config - Parameterization to report errors to

reportError

public void reportError(ParameterException e)

Description copied from interface: Parameterization

Report a configuration error.

Specified by:

reportError in interface Parameterization

Overrides:

reportError in class AbstractParameterization

Parameters:

e - Destination to report errors to

descend

public Parameterization descend(java.lang.Object option)

Descend parameterization tree into sub-option. Note: this is done automatically by a ClassParameter.instantiateClass(de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.Parameterization). You only need to call this when you want to expose the tree structure without offering a class choice as parameter. Parallel descend in all chains.

Parameters:

option - Option subtree

Returns:

Parameterization