agi.foundation.communications.signalprocessing

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

Class IntendedSignalByIdentifier<TIdentifier>

java.lang.Object

agi.foundation.infrastructure.DefinitionalObject

agi.foundation.communications.signalprocessing.IntendedSignalStrategy

agi.foundation.communications.signalprocessing.IntendedSignalByIdentifier<TIdentifier>

Type Parameters:

TIdentifier - The type used to identify the signal.

All Implemented Interfaces:

ICloneWithContext, IEnumerateDependencies, IEquatableDefinition, IFreezable

public class IntendedSignalByIdentifier<TIdentifier>
extends IntendedSignalStrategy

An IntendedSignalStrategy which identifies intended signals using the presence of a specified object as an identifier.

This strategy is useful for identifying signals by the data they carry. To use this strategy, define an immutable type for the data the signal will carry. Add an instance of this type to the signal using one of the appropriate constructors, or the Signal.addData(java.lang.Object) method on the Signal. You can also add data to a signal through the constructors and methods on ComplexDigitalTransmitter or DigitalDataSource. Once the data is added to the signal, use this strategy, with the same data, to identify the signal.

Constructor Summary

Constructors

Modifier	Constructor and Description
	IntendedSignalByIdentifier(TypeLiteral<TIdentifier> typeLiteralTIdentifier) Initializes a new instance.
protected	IntendedSignalByIdentifier(TypeLiteral<TIdentifier> typeLiteralTIdentifier, IntendedSignalByIdentifier<TIdentifier> existingInstance, CopyContext context) Initializes a new instance as a copy of an existing instance.
	IntendedSignalByIdentifier(TypeLiteral<TIdentifier> typeLiteralTIdentifier, TIdentifier signalIdentifier) Create a new instance which will target a signal with the specified identifier.

Method Summary

Modifier and Type	Method and Description
protected boolean	checkForSameDefinition(IntendedSignalByIdentifier<TIdentifier> other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
protected boolean	checkForSameDefinition(IntendedSignalStrategy 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.
SignalEvaluator	getAllIntendedSignalsEvaluator(EvaluatorGroup group, SignalPropagationGraph graph, ISignalSource signalSource) Get an evaluator which produces a single Signal from the given ISignalSource by looking for identifying object.
IEqualityComparer<TIdentifier>	getEqualityComparer() Gets the equality comparer used to determine if the identifier of the signal matches the identifier returned from the SignalIdentifier (get / set) property.
TIdentifier	getSignalIdentifier() Gets the identifier to target when searching for the intended signal.
void	setEqualityComparer(IEqualityComparer<TIdentifier> value) Sets the equality comparer used to determine if the identifier of the signal matches the identifier returned from the SignalIdentifier (get / set) property.
void	setSignalIdentifier(TIdentifier value) Sets the identifier to target when searching for the intended signal.

Methods inherited from class agi.foundation.communications.signalprocessing.IntendedSignalStrategy

checkForSameDefinition, getIntendedSignalEvaluator, getUnintendedSignalEvaluator

Methods inherited from class agi.foundation.infrastructure.DefinitionalObject

areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, dictionaryItemsAreSameDefinition, enumerateDependencies, 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

IntendedSignalByIdentifier

public IntendedSignalByIdentifier(TypeLiteral<TIdentifier> typeLiteralTIdentifier)

Initializes a new instance.

Parameters:

typeLiteralTIdentifier - A TypeLiteral object representing the generic type TIdentifier.

IntendedSignalByIdentifier

public IntendedSignalByIdentifier(TypeLiteral<TIdentifier> typeLiteralTIdentifier,
                                  TIdentifier signalIdentifier)

Create a new instance which will target a signal with the specified identifier.

Parameters:

typeLiteralTIdentifier - A TypeLiteral object representing the generic type TIdentifier.

signalIdentifier - The object used to identify the signal.

IntendedSignalByIdentifier

protected IntendedSignalByIdentifier(TypeLiteral<TIdentifier> typeLiteralTIdentifier,
                                     @Nonnull
                                     IntendedSignalByIdentifier<TIdentifier> 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:

typeLiteralTIdentifier - A TypeLiteral object representing the generic type TIdentifier.

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(IntendedSignalStrategy 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 IntendedSignalStrategy

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(IntendedSignalByIdentifier<TIdentifier> 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 IntendedSignalByIdentifier.checkForSameDefinition(agi.foundation.communications.signalprocessing.IntendedSignalStrategy) method.

Overrides:

computeCurrentDefinitionHashCode in class IntendedSignalStrategy

Returns:

The computed hash code.

getAllIntendedSignalsEvaluator

public SignalEvaluator getAllIntendedSignalsEvaluator(EvaluatorGroup group,
                                                      SignalPropagationGraph graph,
                                                      ISignalSource signalSource)

Get an evaluator which produces a single Signal from the given ISignalSource by looking for identifying object.

Specified by:

getAllIntendedSignalsEvaluator in class IntendedSignalStrategy

Parameters:

group - The evaluator group to use when creating evaluators.

graph - The graph of the communication links used to propagate signals.

signalSource - The source of the input signals.

Returns:

An evaluator which produces the intended signal.

Throws:

ArgumentNullException - Thrown when group, graph, or signalSource is null.

PropertyInvalidException - Thrown when SignalIdentifier (get / set) is null.

getSignalIdentifier

public final TIdentifier getSignalIdentifier()

Gets the identifier to target when searching for the intended signal.

setSignalIdentifier

public final void setSignalIdentifier(TIdentifier value)

Sets the identifier to target when searching for the intended signal.

getEqualityComparer

public final IEqualityComparer<TIdentifier> getEqualityComparer()

Gets the equality comparer used to determine if the identifier of the signal matches the identifier returned from the SignalIdentifier (get / set) property.

setEqualityComparer

public final void setEqualityComparer(IEqualityComparer<TIdentifier> value)

Sets the equality comparer used to determine if the identifier of the signal matches the identifier returned from the SignalIdentifier (get / set) property.