agi.foundation.propagators

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

Class AuxiliaryStateVector

java.lang.Object

agi.foundation.infrastructure.DefinitionalObject

agi.foundation.propagators.advanced.AuxiliaryStateElement

agi.foundation.propagators.AuxiliaryStateVector

All Implemented Interfaces:

ICloneWithContext, IEnumerateDependencies, IEquatableDefinition, IFreezable

public class AuxiliaryStateVector
extends AuxiliaryStateElement

An auxiliary state vector which is not integrated with the rest of the state but is evaluated for the propagation output during propagation.

Constructor Summary

Constructors

Modifier	Constructor and Description
	AuxiliaryStateVector() Initializes a new instance.
protected	AuxiliaryStateVector(AuxiliaryStateVector existingInstance, CopyContext context) Initializes a new instance as a copy of an existing instance.
	AuxiliaryStateVector(Vector value) Initializes a new instance based on the given Vector.

Method Summary

Modifier and Type	Method and Description
protected boolean	checkForSameDefinition(AuxiliaryStateElement other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
protected boolean	checkForSameDefinition(AuxiliaryStateVector 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.
Vector	getAuxiliaryVector() Gets the vector to include as an auxiliary state in the propagation output.
AuxiliaryStateElementConverter	getConverter(int[] auxiliaryIndices) Gets an instance of an output type which can convert the output of propagation back into the native type of this auxiliary state element.
Axes	getDefinedInAxes() Gets the Axes that this vector is defined in.
int	getDimension() Gets the dimension, which is three for a Vector
AuxiliaryStateElementEvaluator	getEvaluator(EvaluatorGroup group, int[] auxiliaryIndices) Gets an evaluator which can compute the auxiliary variables based on the current time and any "integrated" definitional objects taken from PropagationStateElements which are updated during integration.
int	getOrder() Gets the highest order of the Vector to produce for the output.
void	setAuxiliaryVector(Vector value) Sets the vector to include as an auxiliary state in the propagation output.
void	setDefinedInAxes(Axes value) Sets the Axes that this vector is defined in.
void	setOrder(int value) Sets the highest order of the Vector to produce for the output.

Methods inherited from class agi.foundation.propagators.advanced.AuxiliaryStateElement

checkForSameDefinition, getIdentification, setIdentification

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

AuxiliaryStateVector

public AuxiliaryStateVector()

Initializes a new instance.

AuxiliaryStateVector

public AuxiliaryStateVector(Vector value)

Initializes a new instance based on the given Vector.

Parameters:

value - The vector to output.

AuxiliaryStateVector

protected AuxiliaryStateVector(@Nonnull
                               AuxiliaryStateVector 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 DefinitionalObject

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(AuxiliaryStateElement 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 AuxiliaryStateElement

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(AuxiliaryStateVector 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 AuxiliaryStateVector.checkForSameDefinition(agi.foundation.propagators.advanced.AuxiliaryStateElement) method.

Overrides:

computeCurrentDefinitionHashCode in class AuxiliaryStateElement

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.

getAuxiliaryVector

public final Vector getAuxiliaryVector()

Gets the vector to include as an auxiliary state in the propagation output.

setAuxiliaryVector

public final void setAuxiliaryVector(Vector value)

Sets the vector to include as an auxiliary state in the propagation output.

getDefinedInAxes

public final Axes getDefinedInAxes()

Gets the Axes that this vector is defined in. If this is null then the AuxiliaryStateVector will retain the same Axes as that of the AuxiliaryVector (get / set) property.

setDefinedInAxes

public final void setDefinedInAxes(Axes value)

Sets the Axes that this vector is defined in. If this is null then the AuxiliaryStateVector will retain the same Axes as that of the AuxiliaryVector (get / set) property.

getDimension

public int getDimension()

Gets the dimension, which is three for a Vector

Specified by:

getDimension in class AuxiliaryStateElement

getOrder

public int getOrder()

Gets the highest order of the Vector to produce for the output. Zero will produce the vector's value, one will produce its value and its first derivative, and higher orders will produce vectors up to and including the given order.

Specified by:

getOrder in class AuxiliaryStateElement

setOrder

public void setOrder(int value)

Sets the highest order of the Vector to produce for the output. Zero will produce the vector's value, one will produce its value and its first derivative, and higher orders will produce vectors up to and including the given order.

Specified by:

setOrder in class AuxiliaryStateElement

getConverter

public AuxiliaryStateElementConverter getConverter(int[] auxiliaryIndices)

Gets an instance of an output type which can convert the output of propagation back into the native type of this auxiliary state element.

Specified by:

getConverter in class AuxiliaryStateElement

Parameters:

auxiliaryIndices - The set of indices corresponding to the location of each value of this auxiliary state element in the overall auxiliary state.

Returns:

The converter for this output.

getEvaluator

public AuxiliaryStateElementEvaluator getEvaluator(EvaluatorGroup group,
                                                   int[] auxiliaryIndices)

Gets an evaluator which can compute the auxiliary variables based on the current time and any "integrated" definitional objects taken from PropagationStateElements which are updated during integration.

Specified by:

getEvaluator in class AuxiliaryStateElement

Parameters:

group - The evaluator group in which to construct the evaluator.

auxiliaryIndices - The set of indices corresponding to the location of each value of this auxiliary state element in the overall auxiliary state.

Returns:

An evaluator which computes the auxiliary variables for this element.

Throws:

ArgumentNullException - Thrown when group is null.