agi.foundation.segmentpropagation

(agi.foundation.segmentpropagation-2023r2.jar)

Class ChangeStoppingConditionThresholdOperator<T>

java.lang.Object

agi.foundation.infrastructure.DefinitionalObject

agi.foundation.segmentpropagation.TargetedSegmentListOperator

agi.foundation.segmentpropagation.ChangeStoppingConditionThresholdOperator<T>

Type Parameters:

T - The type of threshold, often a double, Duration, or JulianDate.

All Implemented Interfaces:

ICloneWithContext, IEnumerateDependencies, IEquatableDefinition, IFreezable

public class ChangeStoppingConditionThresholdOperator<T>
extends TargetedSegmentListOperator

A TargetedSegmentListOperator that will change the value of a threshold at propagation time.

Constructor Summary

Constructors

Modifier	Constructor and Description
	ChangeStoppingConditionThresholdOperator() Initializes a new instance.
protected	ChangeStoppingConditionThresholdOperator(ChangeStoppingConditionThresholdOperator<T> existingInstance, CopyContext context) Initializes a new instance as a copy of an existing instance.
	ChangeStoppingConditionThresholdOperator(ComputeNewThresholdCallback<T> callback, T initialValue) Initializes a new instance.

Method Summary

Modifier and Type	Method and Description
protected boolean	checkForSameDefinition(ChangeStoppingConditionThresholdOperator<T> other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
protected boolean	checkForSameDefinition(TargetedSegmentListOperator other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
Object	clone(CopyContext context) Clones this object using the specified context.
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.
T	getInitialValue() Gets the initial value to use for the StoppingCondition that the Threshold (get) is the threshold of.
TargetedSegmentListOperatorEvaluator	getOperatorEvaluator(EvaluatorGroup group) Creates and returns the fully configured TargetedSegmentListOperatorEvaluator for use in a TargetedSegmentLists propagator.
ValueDefinition<T>	getThreshold() Gets the threshold value that this operator will change.
ComputeNewThresholdCallback<T>	getThresholdCallback() Gets the callback that will compute the new value of the threshold.
ValueParameter<T>	getThresholdParameter() Gets the parameter that can be used to parameterize evaluators that should be changed by this operator.
void	setInitialValue(T value) Sets the initial value to use for the StoppingCondition that the Threshold (get) is the threshold of.
void	setThresholdCallback(ComputeNewThresholdCallback<T> value) Sets the callback that will compute the new value of the threshold.
void	setThresholdParameter(ValueParameter<T> value) Sets the parameter that can be used to parameterize evaluators that should be changed by this operator.

Methods inherited from class agi.foundation.segmentpropagation.TargetedSegmentListOperator

checkForSameDefinition, getName, setName

Methods inherited from class agi.foundation.infrastructure.DefinitionalObject

areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, dictionaryItemsAreSameDefinition, freeze, freezeAggregatedObjects, 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

ChangeStoppingConditionThresholdOperator

public ChangeStoppingConditionThresholdOperator()

Initializes a new instance.

ChangeStoppingConditionThresholdOperator

public ChangeStoppingConditionThresholdOperator(ComputeNewThresholdCallback<T> callback,
                                                T initialValue)

Initializes a new instance.

Parameters:

callback - The callback that will produce a new threshold.

initialValue - The initial value to use for the threshold. This value will override whatever the StoppingCondition was initially configured with.

ChangeStoppingConditionThresholdOperator

protected ChangeStoppingConditionThresholdOperator(@Nonnull
                                                   ChangeStoppingConditionThresholdOperator<T> 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

clone

public Object clone(CopyContext context)

Clones this object using the specified context.

This method should be implemented to call a copy constructor on the class of the object being cloned. The copy constructor should take the CopyContext as a parameter in addition to the existing instance to copy. The copy constructor should first call CopyContext.addObjectMapping(T, T) to identify the newly constructed instance as a copy of the existing instance. It should then copy all fields, using CopyContext.updateReference(T) to copy any reference fields.

A typical implementation of ICloneWithContext:

public static class MyClass implements ICloneWithContext {
    public MyClass(MyClass existingInstance, CopyContext context) {
        context.addObjectMapping(existingInstance, this);
        someReference = context.updateReference(existingInstance.someReference);
    }

    @Override
    public final Object clone(CopyContext context) {
        return new MyClass(this, context);
    }

    private Object someReference;
}

In general, all fields that are reference types should be copied with a call to CopyContext.updateReference(T). There are a couple of exceptions:

1. Fields that are aggregate parts of the object should always be copied. A referenced object is an aggregate if properties or methods on the object being copied can modify the externally-visible value of the referenced object.
2. If the semantics of the referenced object require that it have a single parent, owner, context, etc., and the object being copied is that parent, owner, or context, then the referenced object should always be copied.

If one of these exceptions applies, the CopyContext should be given an opportunity to update the reference before the reference is copied explicitly. Use CopyContext.updateReference(T) to update the reference. If CopyContext.updateReference(T) returns the original object, indicating that the context does not have a replacement registered, then copy the object manually by invoking a Clone method, a copy constructor, or by manually constructing a new instance and copying the values.

alwaysCopy = context.updateReference(existingInstance.alwaysCopy);
if (existingInstance.alwaysCopy != null && alwaysCopy == existingInstance.alwaysCopy) {
    alwaysCopy = (AlwaysCopy) existingInstance.alwaysCopy.clone(context);
}

If you are implementing an evaluator (a class that implements IEvaluator), the IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) method shares some responsibilities with the copy context constructor. Code duplication can be avoided by doing the following:

1. For references to other evaluators ONLY, simply assign the reference in the constructor instead of calling CopyContext.updateReference(T). You should still call CopyContext.updateReference(T) on any references to non-evaluators.
2. Call IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as the last line in the constructor and pass it the same CopyContext passed to the constructor.
3. Implement IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as normal. See the reference documentation for IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) for more information on implementing that method.

public MyClass(MyClass existingInstance, CopyContext context) {
    super(existingInstance, context);
    someReference = context.updateReference(existingInstance.someReference);
    evaluatorReference = existingInstance.evaluatorReference;
    updateEvaluatorReferences(context);
}

@Override
public void updateEvaluatorReferences(CopyContext context) {
    evaluatorReference = context.updateReference(evaluatorReference);
}

@Override
public Object clone(CopyContext context) {
    return new MyClass(this, context);
}

private Object someReference;
private IEvaluator evaluatorReference;

Specified by:

clone in interface ICloneWithContext

Specified by:

clone in class TargetedSegmentListOperator

Parameters:

context - The context to use to perform the copy.

Returns:

A new instance which is a copy of this object.

checkForSameDefinition

protected final boolean checkForSameDefinition(TargetedSegmentListOperator 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 TargetedSegmentListOperator

Parameters:

other - The other instance to compare to this one.

Returns:

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

checkForSameDefinition

protected boolean checkForSameDefinition(ChangeStoppingConditionThresholdOperator<T> 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 ChangeStoppingConditionThresholdOperator.checkForSameDefinition(agi.foundation.segmentpropagation.TargetedSegmentListOperator) method.

Overrides:

computeCurrentDefinitionHashCode in class TargetedSegmentListOperator

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.

getThreshold

@Nonnull
public final ValueDefinition<T> getThreshold()

Gets the threshold value that this operator will change.

getThresholdCallback

public final ComputeNewThresholdCallback<T> getThresholdCallback()

Gets the callback that will compute the new value of the threshold.

setThresholdCallback

public final void setThresholdCallback(ComputeNewThresholdCallback<T> value)

Sets the callback that will compute the new value of the threshold.

getThresholdParameter

public final ValueParameter<T> getThresholdParameter()

Gets the parameter that can be used to parameterize evaluators that should be changed by this operator.

setThresholdParameter

public final void setThresholdParameter(ValueParameter<T> value)

Sets the parameter that can be used to parameterize evaluators that should be changed by this operator.

getInitialValue

public final T getInitialValue()

Gets the initial value to use for the StoppingCondition that the Threshold (get) is the threshold of. The value that the threshold of the StoppingCondition is initially configured with will be ignored and this value will be used instead.

setInitialValue

public final void setInitialValue(T value)

Sets the initial value to use for the StoppingCondition that the Threshold (get) is the threshold of. The value that the threshold of the StoppingCondition is initially configured with will be ignored and this value will be used instead.

getOperatorEvaluator

public TargetedSegmentListOperatorEvaluator getOperatorEvaluator(EvaluatorGroup group)

Creates and returns the fully configured TargetedSegmentListOperatorEvaluator for use in a TargetedSegmentLists propagator.

Specified by:

getOperatorEvaluator in class TargetedSegmentListOperator

Parameters:

group - The EvaluatorGroup to use when creating evaluators.

Returns:

The fully configured TargetedSegmentListOperatorEvaluator.