| /***************************************************************************** |
| * Copyright (c) 2015 CEA LIST. |
| * |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Jeremie Tatibouet (CEA LIST) |
| * |
| *****************************************************************************/ |
| package org.eclipse.papyrus.moka.pssm.statemachines; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.papyrus.moka.fuml.commonbehavior.IEventOccurrence; |
| |
| public abstract class PseudostateActivation extends VertexActivation implements IPseudostateActivation { |
| |
| // Transitions that were fireable at the time which the pseudo-state was |
| // evaluated. |
| protected List<ITransitionActivation> fireableTransitions; |
| |
| public PseudostateActivation() { |
| this.fireableTransitions = new ArrayList<ITransitionActivation>(); |
| } |
| |
| public void evaluateAllGuards(IEventOccurrence eventOccurrence) { |
| // Evaluate all guards of outgoing transitions of the pseudo-state. |
| // Guard evaluation populate the set of fireable transitions with |
| // transitions whith guard evaluating to true. Not that this evaluation |
| // is not done at the time the where this pseudo-state is entered. Instead |
| // it is done statically when the compound transition leading to this |
| // pseudo-state is evaluated. |
| this.fireableTransitions.clear(); |
| for (int i = 0; i < this.outgoingTransitionActivations.size(); i++) { |
| ITransitionActivation transitionActivation = this.outgoingTransitionActivations.get(i); |
| if (transitionActivation.evaluateGuard(eventOccurrence)) { |
| this.fireableTransitions.add(transitionActivation); |
| } |
| } |
| } |
| |
| public boolean canPropagateExecution(ITransitionActivation enteringTransition, IEventOccurrence eventOccurrence, |
| IRegionActivation leastCommonAncestor) { |
| // Static analysis is propagated to the parent vertex. If the parent accepts the |
| // propagation and the |
| // pseudo-state can be entered then it must be possible to propagate the |
| // execution through at least |
| // one of the outgoing transitions of the pseudo-state. If it is not possible |
| // false is returned. Not that |
| // in case where the pseudo-state cannot be entered true is returned. |
| boolean propagate = super.canPropagateExecution(enteringTransition, eventOccurrence, leastCommonAncestor); |
| if (propagate && this.isEnterable(enteringTransition, true)) { |
| if (this.outgoingTransitionActivations.size() > 0) { |
| this.evaluateAllGuards(eventOccurrence); |
| propagate = false; |
| if (this.fireableTransitions.size() > 0) { |
| int i = 0; |
| while (!propagate && i < this.fireableTransitions.size()) { |
| propagate = this.fireableTransitions.get(i).canPropagateExecution(eventOccurrence); |
| i++; |
| } |
| } |
| } |
| } |
| return propagate; |
| } |
| |
| } |