org.palladiosimulator.simulizar.reconfiguration.qvto.util

Class QVToModelCache

java.lang.Object

org.palladiosimulator.simulizar.reconfiguration.qvto.util.QVToModelCache

public class QVToModelCache
extends Object

This cache implementation is used to store models (e.g., PCM models or runtime measurement models) that can be parameters of QVTo transformations. To store a model in the cache, its corresponding EPackage (its meta-model) is used as tag.

Author:

Florian Rosenthal

Constructor Summary

Constructors

Constructor and Description
QVToModelCache(IModelAccess modelAccess) Initializes a new instance of the QVToModelCache class.

Method Summary

Modifier and Type	Method and Description
void	clear() Clears the cache, that is, all models are removed.
boolean	containsModelOfType(EPackage ePackage) Gets whether a model of the meta-model represented by the given ePackage is currently in store.
Optional<EObject>	getModelByType(EPackage ePackage) Gets the currently stored model that is an instance of the meta-model represented by the given ePackage.
void	removeModel(EObject model) Removes the given model from the cache, if present. This method does nothing, if null is passed or the given model is not cached.
void	removeModelOfType(EPackage metaModel) Removes the currently stored model that is an instance of the meta-model represented by the given ePackage. In case null is passed, this method does nothing.
QVToModelCache	snapshot() Creates a snapshot of the current state of the cache. More precisely, this method creates an instance that contains the same models as this one.
void	storeModel(EObject modelInstance) Stores the given model in the cache.
void	storeModelFromBlackboardPartition(String partitionId) Stores the model found in the partition of the blackboard that is identified by the given id.

Methods inherited from class java.lang.Object

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

Constructor Detail

QVToModelCache

public QVToModelCache(IModelAccess modelAccess)

Initializes a new instance of the QVToModelCache class.

Parameters:

modelAccess - An IModelAccess implementation that is used to access the globally available models such as the PCM models.

Throws:

NullPointerException - In case modelAccess == null.

See Also:

IModelAccess.getBlackboard(), IModelAccess.getGlobalPCMModel()

Method Detail

storeModel

public void storeModel(EObject modelInstance)

Stores the given model in the cache. If a model of the same type (denoted by the meta-model, i.e., the EPackage that corresponds to the model) is already present, it will be overwritten.
In case null is passed, this method does nothing.

Parameters:

modelInstance - An EObject representing a model.

storeModelFromBlackboardPartition

public final void storeModelFromBlackboardPartition(String partitionId)

Stores the model found in the partition of the blackboard that is identified by the given id. If a model of the same type (denoted by the meta-model, i.e., the EPackage that corresponds to the model) is already present, it will be overwritten.
If the given id does not identify a partition, or the requested partition is empty, nothing happens.

Parameters:

partitionId - A String which identifies a ResourceSetPartition of the the global MDSDBlackboard.

Throws:

NullPointerException - In case partitionId == null.

See Also:

storeModel(EObject)

removeModelOfType

public void removeModelOfType(EPackage metaModel)

Removes the currently stored model that is an instance of the meta-model represented by the given ePackage.
In case null is passed, this method does nothing.

Parameters:

ePackage - An EPackage that describes a meta-model.

removeModel

public void removeModel(EObject model)

Removes the given model from the cache, if present.
This method does nothing, if null is passed or the given model is not cached.

Parameters:

model - The EObject to remove from the cache.

clear

public void clear()

Clears the cache, that is, all models are removed.

snapshot

public QVToModelCache snapshot()

Creates a snapshot of the current state of the cache.
More precisely, this method creates an instance that contains the same models as this one.

Returns:

A QVToModelCache which is a snapshot of the current state of this instance.

getModelByType

public Optional<EObject> getModelByType(EPackage ePackage)

Gets the currently stored model that is an instance of the meta-model represented by the given ePackage.

Parameters:

ePackage - An EPackage that describes a meta-model.

Returns:

The model, contained in an Optional and represented as an EObject, that is an instance of the given meta-model, or an empty Optional if none could be found.

Throws:

NullPointerException - In case ePackage == null.

containsModelOfType

public boolean containsModelOfType(EPackage ePackage)

Gets whether a model of the meta-model represented by the given ePackage is currently in store.

Parameters:

ePackage - An EPackage that describes a meta-model.

Returns:

true if a model of the given type is stored, false otherwise.

Throws:

NullPointerException - In case ePackage == null.

See Also:

getModelByType(EPackage)