agi.foundation.numericalmethods

(agi.foundation.models-2024r2.jar)

Class SegmentPropagatorCostFunction

java.lang.Object

agi.foundation.infrastructure.DefinitionalObject

agi.foundation.numericalmethods.SegmentPropagatorCostFunction

All Implemented Interfaces:

ICloneWithContext, IEnumerateDependencies, IEquatableDefinition, IFreezable

Direct Known Subclasses:

CombinedCostFunction, DelegateBasedCostFunction, ExtremeValueOfSegmentCostFunction, ScalarAtEndOfSegmentCostFunction, ScalarDifferenceOfSegmentCostFunction

public abstract class SegmentPropagatorCostFunction
extends DefinitionalObject

The base type for cost functions for use with the ParameterOptimizer. This is the definition of the evaluator.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SegmentPropagatorCostFunction() Initializes a new instance.
protected	SegmentPropagatorCostFunction(CostFunctionGoal goal, double tolerance) Initializes a new instance.
protected	SegmentPropagatorCostFunction(CostFunctionGoal goal, double tolerance, CostFunctionScaling scaling) Initializes a new instance.
protected	SegmentPropagatorCostFunction(CostFunctionGoal goal, double tolerance, CostFunctionScaling scaling, double weight) Initializes a new instance.
protected	SegmentPropagatorCostFunction(SegmentPropagatorCostFunction existingInstance, CopyContext context) Initializes a new instance as a copy of an existing instance.

Method Summary

Modifier and Type	Method and Description
protected boolean	checkForSameDefinition(DefinitionalObject other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
protected abstract boolean	checkForSameDefinition(SegmentPropagatorCostFunction other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
protected int	computeCurrentDefinitionHashCode() Computes a hash code based on the current properties of this object.
void	enumerateDependencies(DependencyEnumerator enumerator) Enumerates the dependencies of this object by calling DependencyEnumerator#enumerate(T) for each object that this object directly depends upon.
protected void	freezeAggregatedObjects() Called by DefinitionalObject.freeze() to also freeze any objects that are considered to be a part of this object.
abstract SegmentPropagatorCostFunctionEvaluator	getEvaluator(EvaluatorGroup group) Creates and returns the SegmentPropagatorCostFunctionEvaluator.
CostFunctionGoal	getGoal() Gets a value indicating whether the cost function is supposed to be minimized or maximized.
String	getName() Gets an optional name to identify this constraint.
CostFunctionSettings	getSettings() Gets the settings for the ParameterOptimizer associated with this cost function.
void	setGoal(CostFunctionGoal value) Sets a value indicating whether the cost function is supposed to be minimized or maximized.
void	setName(String value) Sets an optional name to identify this constraint.
void	setSettings(CostFunctionSettings value) Sets the settings for the ParameterOptimizer associated with this cost function.
protected void	validateProperties() Validates that required properties are configured correctly in order to get an evaluator for this instance.

Methods inherited from class agi.foundation.infrastructure.DefinitionalObject

areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, clone, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, dictionaryItemsAreSameDefinition, freeze, getCollectionHashCode, getCollectionHashCode, getCollectionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDictionaryHashCode, getIsFrozen, isSameDefinition, throwIfFrozen

Methods inherited from class java.lang.Object

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

Constructor Detail

SegmentPropagatorCostFunction

protected SegmentPropagatorCostFunction()

Initializes a new instance. The weight defaults to 1.0.

Before SegmentPropagatorCostFunction.getEvaluator(agi.foundation.EvaluatorGroup) can be called, Goal (get / set) must be configured, and Settings (get / set) must be configured with a valid Tolerance (get / set). Scaling (get / set) defaults to NoScalingOnCostFunction.

SegmentPropagatorCostFunction

protected SegmentPropagatorCostFunction(@Nonnull
                                        CostFunctionGoal goal,
                                        double tolerance)

Initializes a new instance. The weight defaults to 1.0. Scaling (get / set) defaults to NoScalingOnCostFunction.

Parameters:

goal - Whether the cost function is supposed to be minimized or maximized.

tolerance - The cost function is considered to be converged if its value changes by less than this value from one iteration to the next.

SegmentPropagatorCostFunction

protected SegmentPropagatorCostFunction(@Nonnull
                                        CostFunctionGoal goal,
                                        double tolerance,
                                        @Nonnull
                                        CostFunctionScaling scaling)

Initializes a new instance. The weight defaults to 1.0.

Parameters:

goal - Whether the cost function is supposed to be minimized or maximized.

tolerance - The cost function is considered to be converged if its value changes by less than this value from one iteration to the next.

scaling - The type of scaling to be used on this cost function.

SegmentPropagatorCostFunction

protected SegmentPropagatorCostFunction(@Nonnull
                                        CostFunctionGoal goal,
                                        double tolerance,
                                        @Nonnull
                                        CostFunctionScaling scaling,
                                        double weight)

Initializes a new instance. The weight defaults to 1.0.

Parameters:

goal - Whether the cost function is supposed to be minimized or maximized.

tolerance - The cost function is considered to be converged if its value changes by less than this value from one iteration to the next.

scaling - The type of scaling to be used on this cost function.

weight - A value multiplied by the cost function to prioritize or de-prioritize it with respect to the constraint errors of any active constraints.

SegmentPropagatorCostFunction

protected SegmentPropagatorCostFunction(@Nonnull
                                        SegmentPropagatorCostFunction existingInstance,
                                        @Nonnull
                                        CopyContext context)

Initializes a new instance as a copy of an existing instance.

See ICloneWithContext.clone(CopyContext) for more information about how to implement this constructor in a derived class.

Parameters:

existingInstance - The existing instance to copy.

context - A CopyContext that controls the depth of the copy.

Throws:

ArgumentNullException - Thrown when existingInstance or context is null.

Method Detail

checkForSameDefinition

protected final boolean checkForSameDefinition(DefinitionalObject other)

Checks to determine if another instance has the same definition as this instance and returns true if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return false for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).

Specified by:

checkForSameDefinition in class DefinitionalObject

Parameters:

other - The other instance to compare to this one.

Returns:

true if the two objects are defined equivalently; otherwise false.

checkForSameDefinition

protected abstract boolean checkForSameDefinition(SegmentPropagatorCostFunction other)

Checks to determine if another instance has the same definition as this instance and returns true if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return false for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).

Parameters:

other - The other instance to compare to this one.

Returns:

true if the two objects are defined equivalently; otherwise false.

computeCurrentDefinitionHashCode

protected int computeCurrentDefinitionHashCode()

Computes a hash code based on the current properties of this object. Derived classes MUST override this method and compute a hash code that combines: a unique hash code seed, the base implementation result, and the hash codes of all new fields introduced by the derived class which are used in the SegmentPropagatorCostFunction.checkForSameDefinition(agi.foundation.infrastructure.DefinitionalObject) method.

Overrides:

computeCurrentDefinitionHashCode in class DefinitionalObject

Returns:

The computed hash code.

enumerateDependencies

public void enumerateDependencies(DependencyEnumerator enumerator)

Enumerates the dependencies of this object by calling DependencyEnumerator#enumerate(T) for each object that this object directly depends upon. Derived classes which contain additional dependencies MUST override this method, call the base implementation, and enumerate dependencies introduced by the derived class.

Specified by:

enumerateDependencies in interface IEnumerateDependencies

Overrides:

enumerateDependencies in class DefinitionalObject

Parameters:

enumerator - The enumerator that is informed of the dependencies of this object.

freezeAggregatedObjects

protected void freezeAggregatedObjects()

Called by DefinitionalObject.freeze() to also freeze any objects that are considered to be a part of this object. Derived classes which contain additional aggregated objects MUST override this method, call the base implementation, and freeze aggregated objects introduced by the derived class. The objects that need to be frozen in this method are frequently created in this object's constructor and are not settable via properties.

Overrides:

freezeAggregatedObjects in class DefinitionalObject

getGoal

@Nonnull
public final CostFunctionGoal getGoal()

Gets a value indicating whether the cost function is supposed to be minimized or maximized.

setGoal

public final void setGoal(@Nonnull
                          CostFunctionGoal value)

Sets a value indicating whether the cost function is supposed to be minimized or maximized.

getSettings

public final CostFunctionSettings getSettings()

Gets the settings for the ParameterOptimizer associated with this cost function.

setSettings

public final void setSettings(CostFunctionSettings value)

Sets the settings for the ParameterOptimizer associated with this cost function.

getName

public final String getName()

Gets an optional name to identify this constraint.

setName

public final void setName(String value)

Sets an optional name to identify this constraint.

getEvaluator

@Nonnull
public abstract SegmentPropagatorCostFunctionEvaluator getEvaluator(@Nonnull
                                                                              EvaluatorGroup group)

Creates and returns the SegmentPropagatorCostFunctionEvaluator.

Derived classes should call SegmentPropagatorCostFunction.validateProperties() to check properties owned by this base class, as well as validate their own properties.

Parameters:

group - The EvaluatorGroup to use to create any necessary evaluators for this constraint.

Returns:

The fully configured cost function evaluator.

validateProperties

protected void validateProperties()

Validates that required properties are configured correctly in order to get an evaluator for this instance. Derived classes should call this method when implementing SegmentPropagatorCostFunction.getEvaluator(agi.foundation.EvaluatorGroup), as well as validate their own properties.

Throws:

PropertyInvalidException - Thrown when Settings (get / set) is null, or Scaling (get / set) is null, or Tolerance (get / set) is not greater than zero.