Package org.eclipse.epsilon.eol.models

Class CachedModel<ModelElementType>

java.lang.Object

org.eclipse.epsilon.eol.models.Model

org.eclipse.epsilon.eol.models.CachedModel<ModelElementType>

All Implemented Interfaces:

AutoCloseable, IModel

Direct Known Subclasses:

AbstractEmfModel, AbstractSimulinkModel, BibtexModel, CsvModel, HtmlModel, JdtModel, JsonModel, PlainXmlModel, YamlModel

public abstract class CachedModel<ModelElementType>
extends Model

A model that performs memoization of allContents, getAllOfType and getAllOfKind. Subclasses should implement the template methods, which compute real values from the model or provide keys that can be used with a Map. Although the collections used here are optionally thread-safe, subclasses should manage their own data structures according to the isConcurrent flag. In particular, allContentsFromModel() should be managed appropriately by subclasses.

Nested Class Summary

Nested classes/interfaces inherited from interface org.eclipse.epsilon.eol.models.IModel

IModel.AmbiguityCheckResult

Field Summary

Fields

Modifier and Type	Field	Description
protected Collection<ModelElementType>	allContentsCache
protected Multimap<Object,ModelElementType>	kindCache
static final String	PROPERTY_CACHED	Whether to cache allOf* calls by default.
static final String	PROPERTY_CONCURRENT	Whether to use thread-safe collections by default.
protected Multimap<Object,ModelElementType>	typeCache

Fields inherited from class org.eclipse.epsilon.eol.models.Model

aliases, ENV_PREFIX, name, PROPERTY_ALIASES, PROPERTY_NAME, PROPERTY_READONLOAD, PROPERTY_READONLY, PROPERTY_STOREONDISPOSAL, propertyGetter, propertySetter, readOnLoad, storeOnDisposal

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CachedModel()

Method Summary

Modifier and Type	Method	Description
protected void	addToCache(String type, ModelElementType instance)
Collection<ModelElementType>	allContents()	Returns a collection containing all of the objects contained in this model.
protected abstract Collection<ModelElementType>	allContentsFromModel()
void	clearCache()
ModelElementType	createInstance(String type)
protected abstract ModelElementType	createInstanceInModel(String type)
void	deleteElement(Object o)
protected abstract boolean	deleteElementInModel(Object instance)	Returns true iff the given instance was deleted from the model.
void	dispose()
protected abstract void	disposeModel()
Collection<ModelElementType>	getAllOfKind(String kind)
protected abstract Collection<ModelElementType>	getAllOfKindFromModel(String kind)
protected Collection<ModelElementType>	getAllOfKindOrType(boolean isKind, String modelElementType)
Collection<ModelElementType>	getAllOfType(String type)
protected abstract Collection<ModelElementType>	getAllOfTypeFromModel(String type)
protected abstract Collection<String>	getAllTypeNamesOf(Object instance)	Returns the fully qualified names of every type to which the given object conforms.
protected abstract Object	getCacheKeyForType(String type)	Returns an identity for the given type, which will be used by CachedModel as a key for the memoization of model elements by type.
protected void	initCaches()	Sets the caches based on this model's properties.
boolean	isCachingEnabled()
boolean	isConcurrent()
boolean	isLoaded()	Convenience method for determining when a model has been loaded.
void	load()
void	load(StringProperties properties, IRelativePathResolver resolver)
protected abstract void	loadModel()
protected void	removeFromCache(ModelElementType instance)
void	setCachingEnabled(boolean cachingEnabled)
void	setConcurrent(boolean concurrent)
protected Collection<ModelElementType>	wrap(Collection<ModelElementType> contents)

Methods inherited from class org.eclipse.epsilon.eol.models.Model

allInstances, createInstance, getAliases, getFullyQualifiedTypeNameOf, getMetamodel, getName, getPropertyGetter, getPropertySetter, getTransactionSupport, getTypeOf, isModelElement, isOfKind, isOfType, isPropertySet, isReadOnLoad, isStoredOnDisposal, knowsAboutProperty, load, load, setName, setReadOnLoad, setStoredOnDisposal

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.epsilon.eol.models.IModel

checkAmbiguity, close, getElementById, getElementId, getEnumerationValue, getTypeNameOf, hasType, isInstantiable, owns, setElementId, store, store

Field Details

PROPERTY_CACHED

public static final String PROPERTY_CACHED

Whether to cache allOf* calls by default. False for compatibility.

See Also:

• Constant Field Values

PROPERTY_CONCURRENT

public static final String PROPERTY_CONCURRENT

Whether to use thread-safe collections by default. False for compatibility.

Since:

1.6

See Also:

• Constant Field Values

allContentsCache

protected Collection<ModelElementType> allContentsCache

typeCache

protected Multimap<Object,ModelElementType> typeCache

kindCache

protected Multimap<Object,ModelElementType> kindCache

Constructor Details

CachedModel

protected CachedModel()

Since:

1.6

Method Details

allContentsFromModel

protected abstract Collection<ModelElementType> allContentsFromModel()

getAllOfTypeFromModel

protected abstract Collection<ModelElementType> getAllOfTypeFromModel(String type)
                                                               throws EolModelElementTypeNotFoundException

Throws:

EolModelElementTypeNotFoundException

getAllOfKindFromModel

protected abstract Collection<ModelElementType> getAllOfKindFromModel(String kind)
                                                               throws EolModelElementTypeNotFoundException

Throws:

EolModelElementTypeNotFoundException

createInstanceInModel

protected abstract ModelElementType createInstanceInModel(String type)
                                                   throws EolModelElementTypeNotFoundException,
EolNotInstantiableModelElementTypeException

Throws:

EolModelElementTypeNotFoundException

EolNotInstantiableModelElementTypeException

loadModel

protected abstract void loadModel()
                           throws EolModelLoadingException

Throws:

EolModelLoadingException

disposeModel

protected abstract void disposeModel()

deleteElementInModel

protected abstract boolean deleteElementInModel(Object instance)
                                         throws EolRuntimeException

Returns true iff the given instance was deleted from the model.

Throws:

EolRuntimeException

getCacheKeyForType

protected abstract Object getCacheKeyForType(String type)
                                      throws EolModelElementTypeNotFoundException

Returns an identity for the given type, which will be used by CachedModel as a key for the memoization of model elements by type.

Throws:

EolModelElementTypeNotFoundException

getAllTypeNamesOf

protected abstract Collection<String> getAllTypeNamesOf(Object instance)

Returns the fully qualified names of every type to which the given object conforms. The values are used by by CachedModel for the memoization of model elements by their kind (getAllOfKind(String)).

initCaches

protected void initCaches()

Sets the caches based on this model's properties. This method should only be called if there has been a change to the properties (cachingEnabled or concurrent) as the caches will be reset.

Since:

1.6

setCachingEnabled

public void setCachingEnabled(boolean cachingEnabled)

isCachingEnabled

public boolean isCachingEnabled()

isConcurrent

public boolean isConcurrent()

Returns:

Since:

1.6

setConcurrent

public void setConcurrent(boolean concurrent)

Parameters:

concurrent -

Since:

1.6

wrap

protected Collection<ModelElementType> wrap(Collection<ModelElementType> contents)

Parameters:

contents - The model elements

Returns:

Since:

1.6

addToCache

protected void addToCache(String type,
 ModelElementType instance)
                   throws EolModelElementTypeNotFoundException

Throws:

EolModelElementTypeNotFoundException

removeFromCache

protected void removeFromCache(ModelElementType instance)
                        throws EolModelElementTypeNotFoundException

Throws:

EolModelElementTypeNotFoundException

isLoaded

public boolean isLoaded()

Convenience method for determining when a model has been loaded.

Returns:

Whether the cache has been populated.

Since:

1.6

allContents

public Collection<ModelElementType> allContents()

Description copied from interface: IModel

Returns a collection containing all of the objects contained in this model.

Returns:

all of the objects contained in this model.

getAllOfKindOrType

protected Collection<ModelElementType> getAllOfKindOrType(boolean isKind,
 String modelElementType)
                                                   throws EolModelElementTypeNotFoundException

Parameters:

isKind - true if calling getAllOfKind(String).

modelElementType - The name of the model element type.

Returns:

All model elements conforming to the kind / type (depending on the flag).

Throws:

EolModelElementTypeNotFoundException

Since:

1.6

getAllOfType

public Collection<ModelElementType> getAllOfType(String type)
                                          throws EolModelElementTypeNotFoundException

Throws:

EolModelElementTypeNotFoundException

getAllOfKind

public Collection<ModelElementType> getAllOfKind(String kind)
                                          throws EolModelElementTypeNotFoundException

Throws:

EolModelElementTypeNotFoundException

createInstance

public ModelElementType createInstance(String type)
                                throws EolModelElementTypeNotFoundException,
EolNotInstantiableModelElementTypeException

Throws:

EolModelElementTypeNotFoundException

EolNotInstantiableModelElementTypeException

deleteElement

public void deleteElement(Object o)
                   throws EolRuntimeException

Throws:

EolRuntimeException

load

public void load()
          throws EolModelLoadingException

Throws:

EolModelLoadingException

load

public void load(StringProperties properties,
 IRelativePathResolver resolver)
          throws EolModelLoadingException

Specified by:

load in interface IModel

Overrides:

load in class Model

Throws:

EolModelLoadingException

dispose

public void dispose()

Specified by:

dispose in interface IModel

Overrides:

dispose in class Model

clearCache

public void clearCache()