de.lmu.ifi.dbs.elki.utilities.optionhandling.constraints
Class DefaultValueGlobalConstraint<T extends Comparable<T>>

java.lang.Object
  de.lmu.ifi.dbs.elki.utilities.optionhandling.constraints.DefaultValueGlobalConstraint<T>

Type Parameters:

T - Parameter type

All Implemented Interfaces:

GlobalParameterConstraint

public class DefaultValueGlobalConstraint<T extends Comparable<T>>
extends Object
implements GlobalParameterConstraint

Global parameter constraint for specifying the default value of a parameter dependent on the parameter value of another parameter.

Author:

Steffi Wanka

Field Summary

private Parameter<? super T,T>	hasValue Parameter providing the value.
private Parameter<? super T,T>	needsValue Parameter to be set.

Constructor Summary

DefaultValueGlobalConstraint(Parameter<? super T,T> needsValue, Parameter<? super T,T> hasValue)
Creates a global parameter constraint for specifying the default value of a parameter dependent on the value of an another parameter.

Method Summary

String	getDescription() Returns a description of this global constraint.
void	test() Checks if the parameter providing the default value is already set, and if the two parameters have the same parameter type.

Methods inherited from class java.lang.Object

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

Field Detail

needsValue

private Parameter<? super T extends Comparable<T>,T extends Comparable<T>> needsValue

Parameter to be set.

hasValue

private Parameter<? super T extends Comparable<T>,T extends Comparable<T>> hasValue

Parameter providing the value.

Constructor Detail

DefaultValueGlobalConstraint

public DefaultValueGlobalConstraint(Parameter<? super T,T> needsValue,
                                    Parameter<? super T,T> hasValue)

Creates a global parameter constraint for specifying the default value of a parameter dependent on the value of an another parameter.

Parameters:

needsValue - the parameter whose default value is to be set

hasValue - the parameter providing the value

Method Detail

test

public void test()
          throws ParameterException

Checks if the parameter providing the default value is already set, and if the two parameters have the same parameter type. If so, the default value of one parameter is set as the default value of the other parameter. If not so, a parameter exception is thrown.

Specified by:

test in interface GlobalParameterConstraint

Throws:

ParameterException - if the parameters don't satisfy the parameter constraint.

getDescription

public String getDescription()

Description copied from interface: GlobalParameterConstraint

Returns a description of this global constraint.

Specified by:

getDescription in interface GlobalParameterConstraint

Returns:

a description of this global constraint