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/*****************************************************************************
* Copyright (c) 2015 Christian W. Damus and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Christian W. Damus - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.aof.sync.examples.uml.internal.util;
import static org.eclipse.papyrus.aof.sync.examples.uml.internal.util.NamedElements.shallowCopy;
import static org.eclipse.papyrus.infra.tools.util.StreamUtil.asStream;
import static org.eclipse.papyrus.infra.tools.util.StreamUtil.select;
import java.util.Objects;
import java.util.stream.Stream;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.util.ECrossReferenceAdapter;
import org.eclipse.uml2.uml.Behavior;
import org.eclipse.uml2.uml.BehavioredClassifier;
import org.eclipse.uml2.uml.RedefinableElement;
import org.eclipse.uml2.uml.Region;
import org.eclipse.uml2.uml.State;
import org.eclipse.uml2.uml.StateMachine;
import org.eclipse.uml2.uml.Transition;
import org.eclipse.uml2.uml.UMLPackage;
import org.eclipse.uml2.uml.Vertex;
/**
* Static utilities for resolving the redefining element of some element in a given context.
*/
public class RedefinitionUtil {
private RedefinitionUtil() {
super();
}
/**
* Finds the behavior in a given {@code context} that redefines the specified {@code behavior},
* or creates a new one if it doesn't yet exist.
*/
public static Behavior getRedefiningBehavior(Behavior behavior, BehavioredClassifier context) {
// This is the reference that is actually stored and read from serialization
return getInverseReferencers(behavior, UMLPackage.Literals.STATE_MACHINE__EXTENDED_STATE_MACHINE, Behavior.class)
.filter(b -> b.getContext() == context)
.findFirst().orElseGet(() -> shallowCopy(behavior));
}
private static <T extends EObject> Stream<T> getInverseReferencers(EObject object, EReference reference, Class<T> type) {
return ECrossReferenceAdapter.getCrossReferenceAdapter(object).getInverseReferences(object).stream()
.filter(s -> (s.getEStructuralFeature() == reference) && type.isInstance(s.getEObject()))
.map(s -> type.cast(s.getEObject()));
}
/**
* Finds the region in a given {@code context} that redefines the specified {@code region},
* or creates a new one if it doesn't yet exist.
*/
public static Region getRedefiningRegion(Region region, StateMachine context) {
return getInverseReferencers(region, UMLPackage.Literals.REGION__EXTENDED_REGION, Region.class)
.filter(r -> r.getStateMachine() == context)
.findFirst().orElseGet(() -> shallowCopy(region));
}
/**
* Finds the region in a given {@code context} that redefines the specified {@code region},
* or creates a new one if it doesn't yet exist.
*/
public static Region getRedefiningCompositeStateRegion(Region region, State context) {
return getInverseReferencers(region, UMLPackage.Literals.REGION__EXTENDED_REGION, Region.class)
.filter(r -> r.getState() == context)
.findFirst().orElseGet(() -> shallowCopy(region));
}
/**
* Finds the state in a given {@code context} that redefines the specified {@code state},
* or creates a new one if it doesn't yet exist.
*/
public static State getRedefiningState(State state, Region context) {
return getInverseReferencers(state, UMLPackage.Literals.STATE__REDEFINED_STATE, State.class)
.filter(s -> s.getContainer() == context)
.findFirst().orElseGet(() -> shallowCopy(state));
}
/**
* Finds the vertex in a given {@code context} that redefines the specified {@code vertex},
* or creates a new one if it doesn't yet exist.
*/
public static <V extends Vertex> V getRedefiningVertex(V vertex, Region context) {
@SuppressWarnings("unchecked")
final Class<V> type = (Class<V>) vertex.getClass();
V result;
if (vertex instanceof State) {
result = type.cast(getRedefiningState((State) vertex, context));
} else {
result = context.getSubvertices().stream()
.filter(type::isInstance).map(type::cast)
.filter(v -> Objects.equals(v.getName(), vertex.getName()) && v.eClass() == vertex.eClass())
.findFirst().orElseGet(() -> shallowCopy(vertex));
}
return result;
}
/**
* Finds the transition in a given {@code context} that redefines the specified {@code transition},
* or creates a new one if it doesn't yet exist.
*/
public static Transition getRedefiningTransition(Transition transition, Region context) {
return getInverseReferencers(transition, UMLPackage.Literals.TRANSITION__REDEFINED_TRANSITION, Transition.class)
.filter(t -> t.getContainer() == context)
.findFirst().orElseGet(() -> shallowCopy(transition));
}
/**
* This is used to resolve the matching transition when mapping the notation of a diagram.
* Does not create new transitions: the correspnoding transition element is expected to exist, already
* (notation mappings naturally fire after semantic mappings).
*/
public static Transition getRedefiningTransition(Transition transition, StateMachine context) {
return getInverseReferencers(transition, UMLPackage.Literals.TRANSITION__REDEFINED_TRANSITION, Transition.class)
.filter(t -> t.containingStateMachine() == context)
.findFirst().orElse(null);
}
/**
* Finds the end of a given {@code context} that redefines the specified {@code vertex}.
*/
public static <V extends Vertex> V getRedefiningEnd(V vertex, Transition context) {
V result = null;
// Vertex is null when computing default result of an active operation
if (vertex != null) {
@SuppressWarnings("unchecked")
final Class<V> type = (Class<V>) vertex.getClass();
result = select(asStream(context.containingStateMachine().eAllContents()), type)
.filter(v -> redefines(v, vertex))
.findFirst()
.orElse(null);
}
return result;
}
/**
* Queries whether two elements are in a redefinition relationship.
*
* @return whether {@code element} redefines {@code other}, or vice versa
*/
public static boolean redefines(EObject element, EObject other) {
boolean result = false;
if ((element instanceof RedefinableElement) && (other instanceof RedefinableElement)) {
result = ((RedefinableElement) element).getRedefinedElements().contains(other);
} else if ((element instanceof Vertex) && (other instanceof Vertex)) {
Vertex v1 = (Vertex) element;
Vertex v2 = (Vertex) other;
// Pseudostates correspond by name
result = redefines(v1.getContainer(), v2.getContainer())
&& Objects.equals(v1.getName(), v2.getName());
}
return result;
}
}
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