org.eclipse.viatra.query.runtime.base.api

Class ViatraBaseFactory

java.lang.Object

org.eclipse.viatra.query.runtime.base.api.ViatraBaseFactory

public class ViatraBaseFactory
extends java.lang.Object

Factory class for the utils in the library:

• NavigationHelper (automatic and manual)
• TransitiveClosureUtil

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ViatraBaseFactory()

Method Summary

Modifier and Type	Method and Description
NavigationHelper	createNavigationHelper(org.eclipse.emf.common.notify.Notifier emfRoot, BaseIndexOptions options, org.apache.log4j.Logger logger) The method creates a NavigationHelper index for the given EMF model root.
NavigationHelper	createNavigationHelper(org.eclipse.emf.common.notify.Notifier emfRoot, boolean wildcardMode, boolean dynamicModel, org.apache.log4j.Logger logger) The method creates a NavigationHelper index for the given EMF model root.
NavigationHelper	createNavigationHelper(org.eclipse.emf.common.notify.Notifier emfRoot, boolean wildcardMode, org.apache.log4j.Logger logger) The method creates a NavigationHelper index for the given EMF model root.
TransitiveClosureHelper	createTransitiveClosureHelper(NavigationHelper baseIndex, java.util.Set<org.eclipse.emf.ecore.EReference> referencesToObserve) The method creates a TransitiveClosureHelper instance built on an existing NavigationHelper.
TransitiveClosureHelper	createTransitiveClosureHelper(org.eclipse.emf.common.notify.Notifier emfRoot, java.util.Set<org.eclipse.emf.ecore.EReference> referencesToObserve) The method creates a TransitiveClosureHelper instance for the given EMF model root.
static ViatraBaseFactory	getInstance() Get the singleton instance of ViatraBaseFactory.

Methods inherited from class java.lang.Object

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

Constructor Detail

ViatraBaseFactory

protected ViatraBaseFactory()

Method Detail

getInstance

public static ViatraBaseFactory getInstance()

Get the singleton instance of ViatraBaseFactory.

Returns:

the singleton instance

createNavigationHelper

public NavigationHelper createNavigationHelper(org.eclipse.emf.common.notify.Notifier emfRoot,
                                               boolean wildcardMode,
                                               org.apache.log4j.Logger logger)
                                        throws ViatraBaseException

The method creates a NavigationHelper index for the given EMF model root. A new instance will be created on every call.

A NavigationHelper in wildcard mode will process and index all EStructuralFeatures, EClasses and EDatatypes. If wildcard mode is off, the client will have to manually register the interesting aspects of the model.

The NavigationHelper will be created without dynamic EMF support by default. See createNavigationHelper(Notifier, boolean, boolean, Logger) for more options.

Parameters:

emfRoot - the root of the EMF tree to be indexed. Recommended: Resource or ResourceSet. Can be null - you can add a root later using NavigationHelper.addRoot(Notifier)

wildcardMode - true if all aspects of the EMF model should be indexed automatically, false if manual registration of interesting aspects is desirable

logger - the log output where errors will be logged if encountered during the operation of the NavigationHelper; if null, the default logger for NavigationHelper is used.

Returns:

the NavigationHelper instance

Throws:

ViatraBaseException

See Also:

NavigationHelper

createNavigationHelper

public NavigationHelper createNavigationHelper(org.eclipse.emf.common.notify.Notifier emfRoot,
                                               boolean wildcardMode,
                                               boolean dynamicModel,
                                               org.apache.log4j.Logger logger)
                                        throws ViatraBaseException

The method creates a NavigationHelper index for the given EMF model root. A new instance will be created on every call.

A NavigationHelper in wildcard mode will process and index all EStructuralFeatures, EClasses and EDatatypes. If wildcard mode is off, the client will have to manually register the interesting aspects of the model.

If the dynamic model flag is set to true, the index will use String ids to distinguish between the various EStructuralFeature, EClass and EDataType instances. This way the index is able to handle dynamic EMF instance models too.

Parameters:

emfRoot - the root of the EMF tree to be indexed. Recommended: Resource or ResourceSet. Can be null - you can add a root later using NavigationHelper.addRoot(Notifier)

wildcardMode - true if all aspects of the EMF model should be indexed automatically, false if manual registration of interesting aspects is desirable

dynamicModel - true if the index should use String ids (nsURIs) for the various EMF types and features, and treat multiple EPackages sharing an nsURI as the same. false if dynamic model support is not required

logger - the log output where errors will be logged if encountered during the operation of the NavigationHelper; if null, the default logger for NavigationHelper is used.

Returns:

the NavigationHelper instance

Throws:

ViatraBaseException

See Also:

NavigationHelper

createNavigationHelper

public NavigationHelper createNavigationHelper(org.eclipse.emf.common.notify.Notifier emfRoot,
                                               BaseIndexOptions options,
                                               org.apache.log4j.Logger logger)
                                        throws ViatraBaseException

The method creates a NavigationHelper index for the given EMF model root. A new instance will be created on every call.

For details of base index options including wildcard and dynamic EMF mode, see BaseIndexOptions.

Parameters:

emfRoot - the root of the EMF tree to be indexed. Recommended: Resource or ResourceSet. Can be null - you can add a root later using NavigationHelper.addRoot(Notifier)

options - the options used by the index

logger - the log output where errors will be logged if encountered during the operation of the NavigationHelper; if null, the default logger for NavigationHelper is used.

Returns:

the NavigationHelper instance

Throws:

ViatraBaseException

See Also:

NavigationHelper

createTransitiveClosureHelper

public TransitiveClosureHelper createTransitiveClosureHelper(org.eclipse.emf.common.notify.Notifier emfRoot,
                                                             java.util.Set<org.eclipse.emf.ecore.EReference> referencesToObserve)
                                                      throws ViatraBaseException

The method creates a TransitiveClosureHelper instance for the given EMF model root. A new instance will be created on every call.

One must specify the set of EReferences that will be considered as edges. The set can contain multiple elements; this way one can query forward and backward reachability information along heterogenous paths.

Parameters:

emfRoot - the root of the EMF tree to be processed. Recommended: Resource or ResourceSet.

referencesToObserve - the set of references to observe

Returns:

the TransitiveClosureHelper instance

Throws:

ViatraBaseException - if the creation of the internal NavigationHelper failed

createTransitiveClosureHelper

public TransitiveClosureHelper createTransitiveClosureHelper(NavigationHelper baseIndex,
                                                             java.util.Set<org.eclipse.emf.ecore.EReference> referencesToObserve)

The method creates a TransitiveClosureHelper instance built on an existing NavigationHelper. A new instance will be created on every call.

One must specify the set of EReferences that will be considered as edges. The set can contain multiple elements; this way one can query forward and backward reachability information along heterogenous paths.

Parameters:

baseIndex - the already existing NavigationHelper index on the model

referencesToObserve - the set of references to observe

Returns:

the TransitiveClosureHelper instance