| /***************************************************************************** |
| * |
| * Copyright (c) 2017 CEA LIST. |
| * |
| * 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: |
| * CEA LIST Initial API and implementation |
| * |
| *****************************************************************************/ |
| package org.eclipse.papyrus.moka.externalcontrol.controller; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.papyrus.moka.externalcontrol.util.PushPullStrategyUtil; |
| import org.eclipse.papyrus.moka.fuml.Semantics.Actions.BasicActions.IActionActivation; |
| import org.eclipse.papyrus.moka.fuml.Semantics.Loci.LociL1.ISemanticVisitor; |
| |
| public class NodeEdgeAlternatePushPullStrategy implements IControlledVisitorPushPullStrategy { |
| |
| private List<IExternallyControlledVisitor<? extends ISemanticVisitor>> startingOthers = new ArrayList<IExternallyControlledVisitor<? extends ISemanticVisitor>>(); |
| private List<IExternallyControlledVisitor<? extends ISemanticVisitor>> startingActionVisitors = new ArrayList<IExternallyControlledVisitor<? extends ISemanticVisitor>>(); |
| |
| private List<IExternallyControlledVisitor<? extends ISemanticVisitor>> finishingOthers = new ArrayList<IExternallyControlledVisitor<? extends ISemanticVisitor>>(); |
| private List<IExternallyControlledVisitor<? extends ISemanticVisitor>> finishingActionVisitors = new ArrayList<IExternallyControlledVisitor<? extends ISemanticVisitor>>(); |
| |
| |
| private boolean pullingActions = true; |
| |
| @Override |
| public IExternallyControlledVisitor<? extends ISemanticVisitor> pullEnabledVisitor() { |
| IExternallyControlledVisitor<? extends ISemanticVisitor> result = null; |
| if (pullingActions) { |
| result = pullAction(); |
| if (result == null) { |
| pullingActions = false; |
| result = pullOthers(); |
| } |
| } else { |
| result = pullOthers(); |
| if (result == null) { |
| pullingActions = true; |
| result = pullAction(); |
| } |
| } |
| return result; |
| } |
| |
| |
| private IExternallyControlledVisitor<? extends ISemanticVisitor> pullOthers() { |
| IExternallyControlledVisitor<? extends ISemanticVisitor> result = PushPullStrategyUtil.pullFirstEnabledVisitor(finishingOthers); |
| if (result == null) { |
| result = PushPullStrategyUtil.pullFirstEnabledVisitor(startingOthers); |
| } |
| return result; |
| } |
| |
| |
| private IExternallyControlledVisitor<? extends ISemanticVisitor> pullAction() { |
| IExternallyControlledVisitor<? extends ISemanticVisitor> result = PushPullStrategyUtil.pullFirstEnabledVisitor(finishingActionVisitors); |
| if (result == null) { |
| result = PushPullStrategyUtil.pullFirstEnabledVisitor(startingActionVisitors); |
| } |
| return result; |
| } |
| |
| |
| @Override |
| public void pushVisitor(IExternallyControlledVisitor<? extends ISemanticVisitor> visitor) { |
| if (visitor instanceof IActionActivation) { |
| if (visitor.getState() == ControlledVisitorStep.STARTING){ |
| startingActionVisitors.add(visitor); |
| }else { |
| finishingActionVisitors.add(visitor); |
| } |
| } else { |
| if (visitor.getState() == ControlledVisitorStep.STARTING){ |
| startingOthers.add(0, visitor); |
| }else { |
| finishingOthers.add(0, visitor); |
| } |
| |
| } |
| |
| } |
| |
| @Override |
| public boolean hasEnabledVisitors() { |
| Iterator<IExternallyControlledVisitor<? extends ISemanticVisitor>> visitorIterator = startingActionVisitors.iterator(); |
| while (visitorIterator.hasNext()){ |
| if (visitorIterator.next().isExecutionAllowed()){ |
| return true; |
| } |
| } |
| |
| visitorIterator = finishingActionVisitors.iterator(); |
| while (visitorIterator.hasNext()){ |
| if (visitorIterator.next().isExecutionAllowed()){ |
| return true; |
| } |
| } |
| |
| visitorIterator = startingOthers.iterator(); |
| while (visitorIterator.hasNext()){ |
| if (visitorIterator.next().isExecutionAllowed()){ |
| return true; |
| } |
| } |
| |
| visitorIterator = finishingOthers.iterator(); |
| while (visitorIterator.hasNext()){ |
| if (visitorIterator.next().isExecutionAllowed()){ |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| } |