org.eclipse.emf.emfstore.internal.common.model.util

Class ModelUtil

java.lang.Object

org.eclipse.emf.emfstore.internal.common.model.util.ModelUtil

public final class ModelUtil
extends Object

Utility class for ModelElements.

Author:

koegel, emueller, ottovonwesen, jfaltermeier

Field Summary

Fields

Modifier and Type	Field and Description
static long	NO_CHECKSUM Constant that may be used in case no checksum computation has taken place.
static org.eclipse.emf.common.util.URI	VIRTUAL_URI URI used to serialize EObject with the model util.

Method Summary

Modifier and Type	Method and Description
static boolean	areEqual(IdEObjectCollection collectionA, IdEObjectCollection collectionB) Compares two IdEObjectCollections.
static <T extends org.eclipse.emf.ecore.EObject> List<T>	clone(List<T> list) Clone a list of EObjects.
static <T extends org.eclipse.emf.ecore.EObject> T	clone(T eObject) Clone any EObject.
static List<SettingWithReferencedElement>	collectOutgoingCrossReferences(IdEObjectCollection collection, Set<org.eclipse.emf.ecore.EObject> modelElements) Retrieve all outgoing connections from the model elements to other elements in the collection.
static long	computeChecksum(org.eclipse.emf.ecore.EObject eObject) Computes the checksum for a given EObject.
static long	computeChecksum(IdEObjectCollection collection) Computes the checksum for a given IdEObjectCollection.
static long	computeChecksumLegacy(org.eclipse.emf.ecore.EObject eObject) Computes the checksum for a given EObject.
static IdEObjectCollection	copyIdEObjectCollection(IdEObjectCollection collection, org.eclipse.emf.ecore.xmi.XMIResource res) Copies the given IdEObjectCollection and writes the IDs it contains into the given XMIResource.
static ModelElementId	createModelElementId(String id) Creates a ModelElementId object from a string.
static org.eclipse.emf.ecore.resource.ResourceSet	createResourceSetForURI(org.eclipse.emf.common.util.URI resourceURI) Creates and returns a new ResourceSet which may be used to load the given URI.
static void	deleteIncomingCrossReferencesToElement(org.eclipse.emf.ecore.EObject element, Collection<org.eclipse.emf.ecore.EStructuralFeature.Setting> inverseReferences, Set<org.eclipse.emf.ecore.EObject> referenceSourceElementsToIgnore) Delete the given incoming cross references to the given model element from any other model element in the given collection except for the set of source elements to ignore.
static void	deleteOutgoingCrossReferences(IdEObjectCollection collection, org.eclipse.emf.ecore.EObject modelElement) Delete all outgoing cross references of the given model element to any element in the given collection.
static void	deleteResourcesWithPrefix(org.eclipse.emf.ecore.resource.ResourceSet resourceSet, String prefix) Deletes all resources from resourceSet, which string representation of URI starts with prefix.
static String	eObjectToString(org.eclipse.emf.ecore.EObject eObject) Copies the given EObject and converts it to a string.
static String	eObjectToString(org.eclipse.emf.ecore.EObject eObject, Map<?,?> saveOptions) Copies the given EObject and converts it to a string.
static <T extends org.eclipse.emf.ecore.EObject> List<T>	flatCloneList(List<T> originalList) Create a flat clone of the list, the list if cloned but ot its content.
static Set<org.eclipse.emf.ecore.EObject>	getAllContainedModelElements(Collection<org.eclipse.emf.ecore.EObject> modelElements, boolean includeTransientContainments, boolean ignoreSingletonDatatypes) Get all contained elements of a given collection of model elements.
static Set<org.eclipse.emf.ecore.EObject>	getAllContainedModelElements(org.eclipse.emf.ecore.EObject modelElement, boolean includeTransientContainments) Get all contained elements of a given element.
static Set<org.eclipse.emf.ecore.EObject>	getAllContainedModelElements(org.eclipse.emf.ecore.EObject modelElement, boolean includeTransientContainments, boolean ignoreSingletonDatatypes) Get all contained elements of a given element.
static Set<org.eclipse.emf.ecore.EObject>	getAllContainedModelElements(org.eclipse.emf.ecore.resource.Resource resource, boolean includeTransientContainments, boolean ignoreSingletonDatatypes) Get all contained elements of a given resource.
static List<org.eclipse.emf.ecore.EObject>	getAllContainedModelElementsAsList(org.eclipse.emf.ecore.EObject modelElement, boolean includeTransientContainments) Get all contained elements of a given element as a list.
static Set<org.eclipse.emf.ecore.EClass>	getAllMETypes(org.eclipse.emf.ecore.EPackage ePackage) Recursively goes through package and returns a list of all EClasses inheriting ModelElement (abstract classes and interfaces are also include).
static Map<Object,Object>	getChecksumSaveOptions() Delivers a map of options that is used while computing a checksum.
static org.eclipse.emf.ecore.EObject	getContainerModelElement(org.eclipse.emf.ecore.EObject modelElement) Get the container of an EObject.
static ModelElementId	getModelElementId(org.eclipse.emf.ecore.EObject modelElement) Searches for the project and then looks for the modelelement id.
static Set<org.eclipse.emf.ecore.EClass>	getNonAbstractMETypes(org.eclipse.emf.ecore.EPackage ePackage) Recursively goes through model and create a list of all non-Abstract classes.
static <T extends org.eclipse.emf.ecore.EObject> T	getParent(Class<T> parent, org.eclipse.emf.ecore.EObject child) Get the EContainer that contains the given model element and whose eContainer is null.
static Project	getProject(org.eclipse.emf.ecore.EObject modelElement) Get Project that contains a model element.
static Map<Object,Object>	getResourceLoadOptions() Delivers a map of options for loading resources.
static IResourceLogger	getResourceLogger() Returns the resource logger.
static Map<Object,Object>	getResourceSaveOptions() Delivers a map of mandatory options for saving resources.
static org.eclipse.emf.ecore.EObject	getSingleton(ModelElementId singletonId) Get the singleton instance for a given model element id.
static ModelElementId	getSingletonModelElementId(org.eclipse.emf.ecore.EObject singleton) Get the singleton id for a singleton instance.
static boolean	isAssociationClassElement(org.eclipse.emf.ecore.EClass eClazz) Whether a EClass is a association class.
static boolean	isSingleton(org.eclipse.emf.ecore.EObject eObject) Return whether the given eObject instance is a singleton.
static <T extends org.eclipse.emf.ecore.EObject> T	loadEObjectFromResource(org.eclipse.emf.ecore.EClass eClass, org.eclipse.emf.common.util.URI resourceURI, boolean checkConstraints) Load an EObject from a resource, the resource is supposed to contain only one root object of the given EClass type.
static void	loadResource(org.eclipse.emf.ecore.resource.Resource resource, IResourceLogger logger) Loads a given resource and logs any warning and/or errors.
static void	log(String message, Throwable exception, int statusInt) This will add a new entry to error log view of eclipse.
static void	logError(String message) Log a error to the platform log.
static void	logException(String message, Throwable exception) Log an exception to the platform log.
static void	logException(Throwable exception) Log an exception to the platform log.
static void	logInfo(String message) Log an exception to the platform log.
static void	logProjectDetails(String message, String user, String projectName, String projectId, String branch, int revision) Logs detailed information about the project state.
static void	logWarning(String message) Log a warning to the platform log.
static void	logWarning(String message, Throwable exception) Log a warning to the platform log.
static void	saveEObjectToResource(org.eclipse.emf.ecore.EObject eObject, org.eclipse.emf.common.util.URI resourceURI) Save an EObject to a resource.
static void	saveEObjectToResource(List<? extends org.eclipse.emf.ecore.EObject> eObjects, org.eclipse.emf.common.util.URI resourceURI) Save a list of EObjects to the resource with the given URI.
static void	saveEObjectToResource(List<? extends org.eclipse.emf.ecore.EObject> eObjects, org.eclipse.emf.common.util.URI resourceURI, Map<Object,Object> options) Save a list of EObjects to the resource with the given URI.
static void	saveResource(org.eclipse.emf.ecore.resource.Resource resource, IResourceLogger logger) Saves a given resource and logs any warning and/or errors.
static void	setXmiIdsOnResource(Project project, org.eclipse.emf.ecore.xmi.XMIResource xmiResource) Set all IDs contained in the project as XMI IDs for the model elements in the project.
static boolean	shouldBeCollected(IdEObjectCollection collection, Set<org.eclipse.emf.ecore.EObject> allModelElements, org.eclipse.emf.ecore.EObject referencedElement) Checks if the referenced elements is an element in the given collection which is not a singleton, not an ignored data type and not already contained in the given set of elements.

Methods inherited from class java.lang.Object

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

Field Detail

NO_CHECKSUM

public static final long NO_CHECKSUM

Constant that may be used in case no checksum computation has taken place.

See Also:

Constant Field Values

VIRTUAL_URI

public static final org.eclipse.emf.common.util.URI VIRTUAL_URI

URI used to serialize EObject with the model util.

Method Detail

createModelElementId

public static ModelElementId createModelElementId(String id)

Creates a ModelElementId object from a string.

Parameters:

id - as string

Returns:

id as object

areEqual

public static boolean areEqual(IdEObjectCollection collectionA,
                               IdEObjectCollection collectionB)

Compares two IdEObjectCollections. Order of the model elements at root level of a collection does not influence the outcome of this operations

Parameters:

collectionA - the first collection

collectionB - the second collection

Returns:

true if the two collections are equal, false otherwise

eObjectToString

public static String eObjectToString(org.eclipse.emf.ecore.EObject eObject)
                              throws SerializationException

Copies the given EObject and converts it to a string.

Parameters:

eObject - the eObject to be serialized

Returns:

the string representation of the eObject

Throws:

SerializationException - if a serialization problem occurs

eObjectToString

public static String eObjectToString(org.eclipse.emf.ecore.EObject eObject,
                                     Map<?,?> saveOptions)
                              throws SerializationException

Copies the given EObject and converts it to a string.

Parameters:

eObject - the eObject to be serialized

saveOptions - the EMF save options to be used during serialization

Returns:

the string representation of the eObject

Throws:

SerializationException - if a serialization problem occurs

computeChecksumLegacy

public static long computeChecksumLegacy(org.eclipse.emf.ecore.EObject eObject)
                                  throws SerializationException

Computes the checksum for a given EObject.

Parameters:

eObject - the EObject for which to compute a checksum

Returns:

the computed checksum

Throws:

SerializationException - in case any errors occur during computation of the checksum

computeChecksum

public static long computeChecksum(org.eclipse.emf.ecore.EObject eObject)
                            throws SerializationException

Computes the checksum for a given EObject.

Parameters:

eObject - the EObject for which to compute a checksum

Returns:

the computed checksum

Throws:

SerializationException - in case any errors occur during computation of the checksum

computeChecksum

public static long computeChecksum(IdEObjectCollection collection)
                            throws SerializationException

Computes the checksum for a given IdEObjectCollection. The checksum for a collection is independent of the order of the collection's elements at the root level.

Parameters:

collection - the collection for which to compute a checksum

Returns:

the computed checksum

Throws:

SerializationException - in case any errors occur during computation of the checksum

getResourceLogger

public static IResourceLogger getResourceLogger()

Returns the resource logger.

Returns:

the resource logger

copyIdEObjectCollection

public static IdEObjectCollection copyIdEObjectCollection(IdEObjectCollection collection,
                                                          org.eclipse.emf.ecore.xmi.XMIResource res)

Copies the given IdEObjectCollection and writes the IDs it contains into the given XMIResource.

Parameters:

collection - the collection to be copied

res - the resource into which the collection's IDs should be written into

Returns:

the copied collection

getResourceLoadOptions

public static Map<Object,Object> getResourceLoadOptions()

Delivers a map of options for loading resources. Especially XMLResource.OPTION_DEFER_IDREF_RESOLUTION which speeds up loading due to our id based resources.

Returns:

map of options for XMIResource or XMLResource.

getResourceSaveOptions

public static Map<Object,Object> getResourceSaveOptions()

Delivers a map of mandatory options for saving resources.

Returns:

map of options for XMIResource or XMLResource.

getChecksumSaveOptions

public static Map<Object,Object> getChecksumSaveOptions()

Delivers a map of options that is used while computing a checksum.

Returns:

map of options for XMIResource or XMLResource.

saveResource

public static void saveResource(org.eclipse.emf.ecore.resource.Resource resource,
                                IResourceLogger logger)
                         throws IOException

Saves a given resource and logs any warning and/or errors.

Parameters:

resource - the resource to be saved

logger - a logger instance which will be used to log warnings and errors on resources

Throws:

IOException - in case an exception occurs during save

loadResource

public static void loadResource(org.eclipse.emf.ecore.resource.Resource resource,
                                IResourceLogger logger)
                         throws IOException

Loads a given resource and logs any warning and/or errors.

Parameters:

resource - the resource to be loaded

logger - a logger instance which will be used to log warnings and errors on resources

Throws:

IOException - in case an exception occurs during load

getNonAbstractMETypes

public static Set<org.eclipse.emf.ecore.EClass> getNonAbstractMETypes(org.eclipse.emf.ecore.EPackage ePackage)

Recursively goes through model and create a list of all non-Abstract classes.

Parameters:

ePackage - the package to start with.

Returns:

list of all non-Abstract model element classes in starting package and its sub-packages

getAllMETypes

public static Set<org.eclipse.emf.ecore.EClass> getAllMETypes(org.eclipse.emf.ecore.EPackage ePackage)

Recursively goes through package and returns a list of all EClasses inheriting ModelElement (abstract classes and interfaces are also include).

Parameters:

ePackage - starting package

Returns:

a list of all EClasses inheriting ModelElement (inclusive abstract classes and interfaces) in starting package and all its sub-packages.

log

public static void log(String message,
                       Throwable exception,
                       int statusInt)

This will add a new entry to error log view of eclipse.

Parameters:

message - message

exception - exception

statusInt - severity. Use one of constants in org.eclipse.core.runtime.Status class.

logException

public static void logException(String message,
                                Throwable exception)

Log an exception to the platform log. This will create a popup in the ui.

Parameters:

message - the message

exception - the exception

logException

public static void logException(Throwable exception)

Log an exception to the platform log. This will create a popup in the ui.

Parameters:

exception - the exception

logWarning

public static void logWarning(String message,
                              Throwable exception)

Log a warning to the platform log. This will NOT create a popup in the UI.

Parameters:

message - the message

exception - the exception

logWarning

public static void logWarning(String message)

Log a warning to the platform log. This will NOT create a popup in the UI.

Parameters:

message - the message being logged

logError

public static void logError(String message)

Log a error to the platform log. This will NOT create a popup in the UI.

Parameters:

message - the message being logged

logInfo

public static void logInfo(String message)

Log an exception to the platform log. This will create a popup in the ui.

Parameters:

message - the message

logProjectDetails

public static void logProjectDetails(String message,
                                     String user,
                                     String projectName,
                                     String projectId,
                                     String branch,
                                     int revision)

Logs detailed information about the project state.

Parameters:

message - the message

user - the user name

projectName - the project name

projectId - the project id

branch - the branch

revision - the revision

clone

public static <T extends org.eclipse.emf.ecore.EObject> T clone(T eObject)

Clone any EObject.

Type Parameters:

T - the Eobject sub type

Parameters:

eObject - the Eobject instance

Returns:

a clone of the Eobject instance

clone

public static <T extends org.eclipse.emf.ecore.EObject> List<T> clone(List<T> list)

Clone a list of EObjects.

Type Parameters:

T - the EObject sub type the list consists of

Parameters:

list - the list instance

Returns:

a clone of the list and its contents instance

flatCloneList

public static <T extends org.eclipse.emf.ecore.EObject> List<T> flatCloneList(List<T> originalList)

Create a flat clone of the list, the list if cloned but ot its content.

Type Parameters:

T - the list type parameter

Parameters:

originalList - the original list

Returns:

a flat copy

loadEObjectFromResource

public static <T extends org.eclipse.emf.ecore.EObject> T loadEObjectFromResource(org.eclipse.emf.ecore.EClass eClass,
                                                                                  org.eclipse.emf.common.util.URI resourceURI,
                                                                                  boolean checkConstraints)
                                                                           throws IOException

Load an EObject from a resource, the resource is supposed to contain only one root object of the given EClass type. Type T must match EClass type.

Type Parameters:

T - Type of the EObject

Parameters:

eClass - the EClass of the EObject

resourceURI - the resources URI

checkConstraints - whether to perform additional sanity checks. These checks basically try to enforce that a resource contains exactly one object.

Returns:

the object loaded from the resource

Throws:

IOException - if loading the object from the resource fails.

createResourceSetForURI

public static org.eclipse.emf.ecore.resource.ResourceSet createResourceSetForURI(org.eclipse.emf.common.util.URI resourceURI)

Creates and returns a new ResourceSet which may be used to load the given URI.

Parameters:

resourceURI - the resource URI

Returns:

the newly created resourceset

saveEObjectToResource

public static void saveEObjectToResource(List<? extends org.eclipse.emf.ecore.EObject> eObjects,
                                         org.eclipse.emf.common.util.URI resourceURI,
                                         Map<Object,Object> options)
                                  throws IOException

Save a list of EObjects to the resource with the given URI.

Parameters:

eObjects - the EObjects to be saved

resourceURI - the URI of the resource, which should be used to save the EObjects

options - The save options for the resource.

Throws:

IOException - if saving to the resource fails

saveEObjectToResource

public static void saveEObjectToResource(List<? extends org.eclipse.emf.ecore.EObject> eObjects,
                                         org.eclipse.emf.common.util.URI resourceURI)
                                  throws IOException

Save a list of EObjects to the resource with the given URI.

Parameters:

eObjects - the EObjects to be saved

resourceURI - the URI of the resource, which should be used to save the EObjects

Throws:

IOException - if saving to the resource fails

setXmiIdsOnResource

public static void setXmiIdsOnResource(Project project,
                                       org.eclipse.emf.ecore.xmi.XMIResource xmiResource)

Set all IDs contained in the project as XMI IDs for the model elements in the project.

Parameters:

project - a project

xmiResource - the resource that will contain the XMI IDs

saveEObjectToResource

public static void saveEObjectToResource(org.eclipse.emf.ecore.EObject eObject,
                                         org.eclipse.emf.common.util.URI resourceURI)
                                  throws IOException

Save an EObject to a resource.

Parameters:

eObject - the object

resourceURI - the resources URI

Throws:

IOException - if saving to the resource fails.

deleteResourcesWithPrefix

public static void deleteResourcesWithPrefix(org.eclipse.emf.ecore.resource.ResourceSet resourceSet,
                                             String prefix)
                                      throws IOException

Deletes all resources from resourceSet, which string representation of URI starts with prefix.

Parameters:

resourceSet - resource set

prefix - string prefix of the resource path

Throws:

IOException - if deleting the resource fails

getProject

public static Project getProject(org.eclipse.emf.ecore.EObject modelElement)

Get Project that contains a model element.

Parameters:

modelElement - the model element

Returns:

the project or null if the element is not contained in a project.

getModelElementId

public static ModelElementId getModelElementId(org.eclipse.emf.ecore.EObject modelElement)

Searches for the project and then looks for the modelelement id.

Parameters:

modelElement - me

Returns:

id

getParent

public static <T extends org.eclipse.emf.ecore.EObject> T getParent(Class<T> parent,
                                                                    org.eclipse.emf.ecore.EObject child)

Get the EContainer that contains the given model element and whose eContainer is null.

Type Parameters:

T - type of the parent class

Parameters:

parent - the class of the parent

child - the model element whose container should get returned

Returns:

the container

isAssociationClassElement

public static boolean isAssociationClassElement(org.eclipse.emf.ecore.EClass eClazz)

Whether a EClass is a association class. Association classes are not displayed as dedicated elements. A link from one element to another which goes over an association class is displayed by a dedicated widget. This widgets allows to trace transparently without seeing the association class.

Parameters:

eClazz - the EClass

Returns:

if it is an association

getAllContainedModelElements

public static Set<org.eclipse.emf.ecore.EObject> getAllContainedModelElements(org.eclipse.emf.ecore.EObject modelElement,
                                                                              boolean includeTransientContainments)

Get all contained elements of a given element.

Parameters:

modelElement - the model element

includeTransientContainments - true if transient containments should be included in the result

Returns:

a set of contained model elements

getAllContainedModelElements

public static Set<org.eclipse.emf.ecore.EObject> getAllContainedModelElements(org.eclipse.emf.ecore.EObject modelElement,
                                                                              boolean includeTransientContainments,
                                                                              boolean ignoreSingletonDatatypes)

Get all contained elements of a given element.

Parameters:

modelElement - the model element

includeTransientContainments - true if transient containments should be included in the result

ignoreSingletonDatatypes - whether to ignore singleton datatypes like, for example, EString

Returns:

a set of contained model elements

getAllContainedModelElements

public static Set<org.eclipse.emf.ecore.EObject> getAllContainedModelElements(org.eclipse.emf.ecore.resource.Resource resource,
                                                                              boolean includeTransientContainments,
                                                                              boolean ignoreSingletonDatatypes)

Get all contained elements of a given resource.

Parameters:

resource - the resource

includeTransientContainments - true if transient containments should be included in the result

ignoreSingletonDatatypes - whether to ignore singleton datatypes like, for example, EString

Returns:

a set of contained model elements Get all

getAllContainedModelElements

public static Set<org.eclipse.emf.ecore.EObject> getAllContainedModelElements(Collection<org.eclipse.emf.ecore.EObject> modelElements,
                                                                              boolean includeTransientContainments,
                                                                              boolean ignoreSingletonDatatypes)

Get all contained elements of a given collection of model elements.

Parameters:

modelElements - a collection of elements

includeTransientContainments - true if transient containments should be included in the result

ignoreSingletonDatatypes - whether to ignore singleton datatypes like, for example, EString

Returns:

a set of contained model elements

getContainerModelElement

public static org.eclipse.emf.ecore.EObject getContainerModelElement(org.eclipse.emf.ecore.EObject modelElement)

Get the container of an EObject.

Parameters:

modelElement - the model element

Returns:

the container

getAllContainedModelElementsAsList

public static List<org.eclipse.emf.ecore.EObject> getAllContainedModelElementsAsList(org.eclipse.emf.ecore.EObject modelElement,
                                                                                     boolean includeTransientContainments)

Get all contained elements of a given element as a list.

Parameters:

modelElement - the model element

includeTransientContainments - true if transient containments should be included in the result

Returns:

a list of contained model elements

deleteIncomingCrossReferencesToElement

public static void deleteIncomingCrossReferencesToElement(org.eclipse.emf.ecore.EObject element,
                                                          Collection<org.eclipse.emf.ecore.EStructuralFeature.Setting> inverseReferences,
                                                          Set<org.eclipse.emf.ecore.EObject> referenceSourceElementsToIgnore)

Delete the given incoming cross references to the given model element from any other model element in the given collection except for the set of source elements to ignore.

Parameters:

inverseReferences - a collection of inverse references

element - the model element

referenceSourceElementsToIgnore - the set of all elements referencing the element to be ignored

deleteOutgoingCrossReferences

public static void deleteOutgoingCrossReferences(IdEObjectCollection collection,
                                                 org.eclipse.emf.ecore.EObject modelElement)

Delete all outgoing cross references of the given model element to any element in the given collection.

Parameters:

collection - the collection

modelElement - the model element

collectOutgoingCrossReferences

public static List<SettingWithReferencedElement> collectOutgoingCrossReferences(IdEObjectCollection collection,
                                                                                Set<org.eclipse.emf.ecore.EObject> modelElements)

Retrieve all outgoing connections from the model elements to other elements in the collection.

Parameters:

collection - the collection

modelElements - the model elements

Returns:

a List of references

shouldBeCollected

public static boolean shouldBeCollected(IdEObjectCollection collection,
                                        Set<org.eclipse.emf.ecore.EObject> allModelElements,
                                        org.eclipse.emf.ecore.EObject referencedElement)

Checks if the referenced elements is an element in the given collection which is not a singleton, not an ignored data type and not already contained in the given set of elements.

Parameters:

collection - the collection

allModelElements - the set of model elements

referencedElement - the referenced element

Returns:

true, if the specified conditions are met.

getSingleton

public static org.eclipse.emf.ecore.EObject getSingleton(ModelElementId singletonId)

Get the singleton instance for a given model element id.

Parameters:

singletonId - the id

Returns:

the singleton instance

getSingletonModelElementId

public static ModelElementId getSingletonModelElementId(org.eclipse.emf.ecore.EObject singleton)

Get the singleton id for a singleton instance.

Parameters:

singleton - the singleton

Returns:

the id

See Also:

ESSingletonIdResolver.getSingletonModelElementId(org.eclipse.emf.ecore.EObject)

isSingleton

public static boolean isSingleton(org.eclipse.emf.ecore.EObject eObject)

Return whether the given eObject instance is a singleton.

Parameters:

eObject - the instance

Returns:

true if it is a singleton

See Also:

ESSingletonIdResolver.isSingleton(org.eclipse.emf.ecore.EObject)