Package com.aquima.interactions.rule.inference

Class InstanceStackContext

java.lang.Object

com.aquima.interactions.profile.wrapper.ProfileDelegate

com.aquima.interactions.rule.inference.InferenceContextDelegate

com.aquima.interactions.rule.inference.InstanceStackContext

All Implemented Interfaces:

IEventChannel, IProfile, IProfileLifecycle, InferenceContext, Serializable

public class InstanceStackContext
extends InferenceContextDelegate

Inference context that uses an instance stack to determine the active instances, and wraps an existing context.

Since:

5.0

Author:

O. Kerpershoek

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
InstanceStackContext(InferenceContext context, InstanceStack stack)	Constructs the inference context with the instance stack and the context that should be used as fall-back.

Method Summary

Modifier and Type	Method	Description
IEntityInstance	getActiveInstance(String entityName)	This method returns the active instance for the specified type.

Methods inherited from class com.aquima.interactions.rule.inference.InferenceContextDelegate

getInferenceDetails

Methods inherited from class com.aquima.interactions.profile.wrapper.ProfileDelegate

activate, addEventListener, commitTransaction, createInstance, createInstance, deleteInstance, getAllInstancesForEntity, getEntityDefinition, getInstance, getInstanceById, getInstanceByName, getProfile, getSingletonInstance, getState, getSupportedEvents, passivate, removeEventListener, restore, rollbackTransaction, startTransaction

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.aquima.interactions.foundation.events.IEventChannel

addEventListener, getSupportedEvents, removeEventListener

Methods inherited from interface com.aquima.interactions.profile.IProfile

commitTransaction, createInstance, createInstance, deleteInstance, getAllInstancesForEntity, getEntityDefinition, getInstance, getInstanceById, getInstanceByName, getSingletonInstance, getState, restore, rollbackTransaction, startTransaction

Methods inherited from interface com.aquima.interactions.profile.IProfileLifecycle

activate, passivate

Constructor Details

InstanceStackContext

public InstanceStackContext(InferenceContext context,
 InstanceStack stack)

Constructs the inference context with the instance stack and the context that should be used as fall-back.

Parameters:

context - The inference context that should be wrapped.

stack - The instance stack that should be used to determine the active instances.

Method Details

getActiveInstance

public IEntityInstance getActiveInstance(String entityName)
                                  throws UnknownInstanceException,
UnknownEntityException,
CreateInstanceException

Description copied from interface: InferenceContext

This method returns the active instance for the specified type. When no active instance can be found for the specified type, the type is assumed to be a singleton instance. When this method is invoked for a non singleton type without any active instance, the call to the getSingletonInstance will fail due to a CreateInstanceException.

Specified by:

getActiveInstance in interface InferenceContext

Overrides:

getActiveInstance in class InferenceContextDelegate

Parameters:

entityName - The entity type for which the active instance is requested.

Returns:

The instance that is active for the specified type.

Throws:

UnknownInstanceException - This exception type is raised when no active instance could be found for the specified type.

UnknownEntityException - This exception type is raised when the entity type is unknown.

CreateInstanceException - This type of exception may be raised when a singleton instance could not be created for the specified type.