plugins/org.eclipse.app4mc.amalthea.sphinx.ui.editors/src/org/eclipse/app4mc/amalthea/sphinx/ui/editors/editor/ExtendedBasicTransactionalFormEditor.java - app4mc/org.eclipse.app4mc - Git at Google

 /**
  ********************************************************************************
  * Copyright (c) 2015-2019 itemis AG and others.
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
  * which is available at https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  *  Contributors:
  *     itemis AG - initial API and implementation
  *     Robert Bosch GmbH
  *       - added listener for refreshing the editor on resource change
  *       - added workaround for CSS styling bug
  ********************************************************************************
  */

 package org.eclipse.app4mc.amalthea.sphinx.ui.editors.editor;

 import java.util.HashMap;
 import java.util.Map;

 import org.eclipse.app4mc.amalthea.sphinx.ui.editors.SphinxSupportPlugin;
 import org.eclipse.core.commands.Command;
 import org.eclipse.core.commands.ExecutionEvent;
 import org.eclipse.core.commands.ExecutionException;
 import org.eclipse.core.commands.NotEnabledException;
 import org.eclipse.core.commands.NotHandledException;
 import org.eclipse.core.commands.common.NotDefinedException;
 import org.eclipse.core.expressions.EvaluationContext;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProjectNature;
 import org.eclipse.core.resources.IResourceChangeEvent;
 import org.eclipse.core.resources.IResourceChangeListener;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.e4.core.contexts.IEclipseContext;
 import org.eclipse.e4.ui.css.swt.theme.IThemeEngine;
 import org.eclipse.e4.ui.model.application.MApplication;
 import org.eclipse.emf.common.notify.AdapterFactory;
 import org.eclipse.emf.common.util.URI;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.util.Util;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor;
 import org.eclipse.sphinx.emf.metamodel.IMetaModelDescriptor;
 import org.eclipse.sphinx.emf.metamodel.MetaModelDescriptorRegistry;
 import org.eclipse.sphinx.emf.model.IModelDescriptor;
 import org.eclipse.sphinx.emf.model.ModelDescriptorRegistry;
 import org.eclipse.sphinx.emf.ui.util.EcoreUIUtil;
 import org.eclipse.sphinx.emf.util.EcorePlatformUtil;
 import org.eclipse.sphinx.platform.util.PlatformLogUtil;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.ui.IEditorInput;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.ISources;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchPartSite;
 import org.eclipse.ui.PartInitException;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.commands.ICommandService;

 @SuppressWarnings("restriction")
 public class ExtendedBasicTransactionalFormEditor extends BasicTransactionalFormEditor
 		implements IResourceChangeListener {

 	private static final String AMALTHEA_MODEL_ID = "org.eclipse.app4mc.amalthea.model";

 	private static final String SHOW_TYPES_OF_ELEMENTS = "show_types_of_elements"; //$NON-NLS-1$

 	/**
 	 * @see org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor#getCustomAdapterFactory()
 	 */
 	@Override
 	protected AdapterFactory getCustomAdapterFactory() {
 		return ExtendedItemProviderAdapterFactory.INSTANCE;
 	}

 	/**
 	 * @see org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor#getEditorInputName()
 	 */
 	@Override
 	protected String getEditorInputName() {
 		final IEditorInput editorInput = getEditorInput();
 		final URI editorURI = EcoreUIUtil.getURIFromEditorInput(editorInput);
 		if (null != editorURI) {
 			final String fileName = editorURI.lastSegment();
 			return fileName;
 		}
 		return super.getEditorInputName();
 	}

 	/**
 	 * @see org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor#addPages()
 	 */
 	@Override
 	protected void addPages() {
 		// super.addPages();
 		try {
 			addPage(new ExtendedContentsTreePage(this));
 		} catch (final PartInitException e) {
 			PlatformLogUtil.logAsError(SphinxSupportPlugin.getDefault(), e);
 		}
 		addResourceChangeListener();
 	}

 	/**
 	 * @param showTypes true shows the type names after the element names, false is
 	 *                  standard behavior
 	 */
 	public void setShowTypesOfElements(final boolean showTypes) {
 		SphinxSupportPlugin.getDefault().getDialogSettings().put(SHOW_TYPES_OF_ELEMENTS, showTypes);
 	}

 	/**
 	 * @return true shows the type names after the element names, false is standard
 	 *         behavior
 	 */
 	public boolean isShowTypesOfElements() {
 		return SphinxSupportPlugin.getDefault().getDialogSettings().getBoolean(SHOW_TYPES_OF_ELEMENTS);
 	}

 	/*
 	 * Register listener for Resource change: here the context is marker deletion
 	 */
 	public void addResourceChangeListener() {
 		ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_CHANGE);
 	}

 	@Override
 	public void resourceChanged(final IResourceChangeEvent event) {
 		final IWorkbenchPartSite site = getSite();
 		if (site == null) return;

 		final IWorkbenchPage page = site.getPage();
 		if (page == null) return;

 		IEditorPart editorPart = page.getActiveEditor();
 		if (!(editorPart instanceof ExtendedBasicTransactionalFormEditor)) return;

 		final ExtendedBasicTransactionalFormEditor activeEditor = (ExtendedBasicTransactionalFormEditor) editorPart;

 		Display.getDefault().asyncExec(new Runnable() {
 			@Override
 			public void run() {
 				Viewer viewer = activeEditor.getViewer();
 				if (viewer != null) {
 					viewer.refresh();
 				}
 			}
 		});
 	}

 	/*
 	 * Workaround for empty viewer after click on already selected item
 	 *
 	 * On Windows some SWT bug avoids repainting of non selected elements. Since the related SWT issue
 	 * has been discussed for years and no real fix was found, we try to limit the negative effects.
 	 * See Bugzilla entries: 491737, 458015, 433858.
 	 *
 	 * If (1) OS is Windows and (2) theming is enabled then an additional redraw is called explicitly.
 	 * Users may notice a minor flickering on selection. However, that is surely preferable to not seeing
 	 * unselected elements at all.
 	 */
 	@Override
 	public void setSelection(ISelection selection) {
 		super.setSelection(selection);

 		if (Util.isWindows() == false) return; // No Windows OS -> no workaround required

 		MApplication application = PlatformUI.getWorkbench().getService(MApplication.class);
 		if (application == null) return;

 		IEclipseContext context = application.getContext();
 		if (context == null) return;

 		IThemeEngine engine = context.get(IThemeEngine.class);
 		if (engine == null) return; // Theming is not enabled -> no workaround required

 		// System.out.println("Theme is " + engine.getActiveTheme().getLabel());

 		// *** Workaround: additional redraw ***
 		Viewer viewer = getViewer();
 		if (viewer != null) {
 			Control control = viewer.getControl();
 			if (control != null) {
 				control.redraw();
 			}
 		}
 	}

 	@Override
 	protected void createPages() {
 		// check model version
 		if (!isFileContainingValidModelNameSpace())
 			return;

 		super.createPages();
 	}

 	/**
 	 * This method is used to check if the file contains valid AMALTHEA model namespace
 	 * (which is compatible to the current MetaModel)
 	 * <br>
 	 * In case if the version of model (associated to the input file) and Meta-Model
 	 * are different -> Message is shown and Editor is not opened
 	 *
 	 */
 	private boolean isFileContainingValidModelNameSpace() {

 		if (getEditorInputObject() != null)
 			return true; // valid Amalthea resource found

 		// Get the IFile object editorInput
 		IEditorInput editorInput = getEditorInput();
 		IFile iFileObject = EcoreUIUtil.getFileFromEditorInput(editorInput);
 		// verify if amlt.no.load.nature is configured.. if so do not load Amalthea model file
 		try {
 			IProjectNature nature = iFileObject.getProject().getNature("amlt.no.load.nature");

 			if (nature != null) {
 				// This is the case, Amalthea model should not be loaded

 				MessageDialog dialog = new MessageDialog(getSite().getShell(), "AMALTHEA Model Editor", null,
 						"File is not loaded as Amalthea \"no load\" nature is configured", MessageDialog.WARNING, 0,
 						"OK", "Remove \"no load\" nature");
 				int open = dialog.open();
 				if (open == 1) {
 					// This is the case user has requested to remove the "Amalthea no.load nature"

 					ICommandService cmdService = getSite().getService(ICommandService.class);
 					Command sampleCommand = cmdService.getCommand("org.eclipse.app4mc.amalthea.noload.nature.remove");

 					Map<String, Object> params = new HashMap<>();
 					if (open == 1)
 						try {
 							StructuredSelection selection = new StructuredSelection(iFileObject.getProject());
 							EvaluationContext context = new EvaluationContext(null, selection);
 							context.addVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME, selection);

 							ExecutionEvent event = new ExecutionEvent(sampleCommand, params, null, context);
 							sampleCommand.executeWithChecks(event);
 							return true;
 						} catch (ExecutionException | NotDefinedException | NotEnabledException
 								| NotHandledException e) {
 							e.printStackTrace();
 						}
 				} else if (open == 0 || open ==-1) {
 					close(false);
 					return false;
 				}

 			}
 		} catch (CoreException e) {
 			// This is a case where nature might not be associated with IProject (or) nature
 			// plugin is missing in the product
 		}

 		// Verify if the Model descriptor can be fetched from the File
 		IModelDescriptor modelDescriptorContent = ModelDescriptorRegistry.INSTANCE.getModel(iFileObject);

 		if (modelDescriptorContent != null)
 			return true; // valid model descriptor found

 		// Get the Meta-Model descriptor belonging to the current version of AMALTHEA meta model plugin
 		IMetaModelDescriptor metaModelDescriptor = MetaModelDescriptorRegistry.INSTANCE.getDescriptor(AMALTHEA_MODEL_ID);

 		if (metaModelDescriptor == null)
 			return true; // undecidable -> delegate the check behaviour to Sphinx

 		// Extracting namespace from MetaModel
 		String nsURIFromMetaModel = metaModelDescriptor.getRootEPackage().getNsURI();

 		// Extracting namespace from Model file
 		String nsURIFromModel = EcorePlatformUtil.readModelNamespace(iFileObject);

 		if ((nsURIFromMetaModel == null) || (nsURIFromModel == null))
 			return true; // undecidable -> delegate the check behaviour to Sphinx

 		// *** Check for unsupported itea versions (legacy) ***

 		final String legacyAMALTHEANameSpacePrefix_1 = "http://www.amalthea.itea2.org/model/";
 		final String legacyAMALTHEANameSpacePrefix_2 = "http://amalthea.itea2.org/model/";

 		if (nsURIFromModel.startsWith(legacyAMALTHEANameSpacePrefix_1)
 				|| nsURIFromModel.startsWith(legacyAMALTHEANameSpacePrefix_2)) {
 			// legacy version detected -> do not open and show error
 			MessageDialog.openWarning(getSite().getShell(), "AMALTHEA Model Editor",
 					"Unsupported File ! \r\rEditor could not be opened because of a legacy model file that is no longer supported.");

 			close(false);
 			return false;
 		}

 		// Extracting AMALTHEA model version
 		String versionFromModel = nsURIFromModel.lastIndexOf("/") != -1
 				? nsURIFromModel.substring(nsURIFromModel.lastIndexOf("/") + 1)
 				: nsURIFromModel;

 		// Extracting AMALTHEA metamodel version
 		String versionFromMetaModel = nsURIFromMetaModel.lastIndexOf("/") != -1
 				? nsURIFromMetaModel.substring(nsURIFromMetaModel.lastIndexOf("/") + 1)
 				: nsURIFromMetaModel;

 		// *** Compare the versions obtained from MetaModel and Model ***

 		if (versionFromMetaModel.equals(versionFromModel)) {
 			// current version detected
 			return true;
 		}

 		String versionMismatchMessage = NLS.bind(
 				"Unsupported File ! \r\rEditor could not be opened because of a version mismatch. \r\rFound AMALTHEA model version : {0}\rCurrent editor supports only AMALTHEA model version :  {1}",
 				new Object[] { versionFromModel, versionFromMetaModel });

 		if (Platform.getBundle("org.eclipse.app4mc.amalthea.converters.ui") == null) {
 			// migration plugins are not loaded -> show warning
 			MessageDialog.openWarning(
 					getSite().getShell(), "AMALTHEA Model Editor",
 					versionMismatchMessage + "\r\r** AMALTHEA Model Migration utility is not available");
 		} else {
 			// other APP4MC version detected -> do not open and show migration hint
 			MessageDialog dialog = new MessageDialog(
 					getSite().getShell(), "AMALTHEA Model Editor", null,
 					versionMismatchMessage + "\r\r** Start AMALTHEA Model Migration utility to convert the model",
 					MessageDialog.QUESTION_WITH_CANCEL, 0,
 					"Migrate to " + versionFromMetaModel, "Show Migration Dialog", "Cancel");
 			int open = dialog.open();
 			// If user chose Migrate option then the Model Migration command is executed to show the migration dialog
 			// IF Start Simple Migration is selected then return value is 0 & for Show Migration Dialog it is 1
 			if (open == MessageDialog.OK || open == MessageDialog.CANCEL) {
 				ICommandService cmdService = getSite().getService(ICommandService.class);
 				Command sampleCommand = cmdService.getCommand("org.eclipse.app4mc.amalthea.modelmigration.dialog.cmd");

 				Map<String, String> params = new HashMap<>();
 				if (open == MessageDialog.OK)
 					params.put("executioncontext", "simplemigration");
 				try {
 					sampleCommand.executeWithChecks(new ExecutionEvent(sampleCommand, params, null, null));
 				} catch (ExecutionException | NotDefinedException | NotEnabledException | NotHandledException e) {
 					e.printStackTrace();
 				}
 			}

 		}

 		close(false);
 		return false;
 	}

 }
	/**
	********************************************************************************
	* Copyright (c) 2015-2019 itemis AG and others.
	*
	* This program and the accompanying materials are made
	* available under the terms of the Eclipse Public License 2.0
	* which is available at https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* itemis AG - initial API and implementation
	* Robert Bosch GmbH
	* - added listener for refreshing the editor on resource change
	* - added workaround for CSS styling bug
	********************************************************************************
	*/

	package org.eclipse.app4mc.amalthea.sphinx.ui.editors.editor;

	import java.util.HashMap;
	import java.util.Map;

	import org.eclipse.app4mc.amalthea.sphinx.ui.editors.SphinxSupportPlugin;
	import org.eclipse.core.commands.Command;
	import org.eclipse.core.commands.ExecutionEvent;
	import org.eclipse.core.commands.ExecutionException;
	import org.eclipse.core.commands.NotEnabledException;
	import org.eclipse.core.commands.NotHandledException;
	import org.eclipse.core.commands.common.NotDefinedException;
	import org.eclipse.core.expressions.EvaluationContext;
	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IProjectNature;
	import org.eclipse.core.resources.IResourceChangeEvent;
	import org.eclipse.core.resources.IResourceChangeListener;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.e4.core.contexts.IEclipseContext;
	import org.eclipse.e4.ui.css.swt.theme.IThemeEngine;
	import org.eclipse.e4.ui.model.application.MApplication;
	import org.eclipse.emf.common.notify.AdapterFactory;
	import org.eclipse.emf.common.util.URI;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.util.Util;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor;
	import org.eclipse.sphinx.emf.metamodel.IMetaModelDescriptor;
	import org.eclipse.sphinx.emf.metamodel.MetaModelDescriptorRegistry;
	import org.eclipse.sphinx.emf.model.IModelDescriptor;
	import org.eclipse.sphinx.emf.model.ModelDescriptorRegistry;
	import org.eclipse.sphinx.emf.ui.util.EcoreUIUtil;
	import org.eclipse.sphinx.emf.util.EcorePlatformUtil;
	import org.eclipse.sphinx.platform.util.PlatformLogUtil;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.ui.IEditorInput;
	import org.eclipse.ui.IEditorPart;
	import org.eclipse.ui.ISources;
	import org.eclipse.ui.IWorkbenchPage;
	import org.eclipse.ui.IWorkbenchPartSite;
	import org.eclipse.ui.PartInitException;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.commands.ICommandService;

	@SuppressWarnings("restriction")
	public class ExtendedBasicTransactionalFormEditor extends BasicTransactionalFormEditor
	implements IResourceChangeListener {

	private static final String AMALTHEA_MODEL_ID = "org.eclipse.app4mc.amalthea.model";

	private static final String SHOW_TYPES_OF_ELEMENTS = "show_types_of_elements"; //$NON-NLS-1$

	/**
	* @see org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor#getCustomAdapterFactory()
	*/
	@Override
	protected AdapterFactory getCustomAdapterFactory() {
	return ExtendedItemProviderAdapterFactory.INSTANCE;
	}

	/**
	* @see org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor#getEditorInputName()
	*/
	@Override
	protected String getEditorInputName() {
	final IEditorInput editorInput = getEditorInput();
	final URI editorURI = EcoreUIUtil.getURIFromEditorInput(editorInput);
	if (null != editorURI) {
	final String fileName = editorURI.lastSegment();
	return fileName;
	}
	return super.getEditorInputName();
	}

	/**
	* @see org.eclipse.sphinx.emf.editors.forms.BasicTransactionalFormEditor#addPages()
	*/
	@Override
	protected void addPages() {
	// super.addPages();
	try {
	addPage(new ExtendedContentsTreePage(this));
	} catch (final PartInitException e) {
	PlatformLogUtil.logAsError(SphinxSupportPlugin.getDefault(), e);
	}
	addResourceChangeListener();
	}

	/**
	* @param showTypes true shows the type names after the element names, false is
	* standard behavior
	*/
	public void setShowTypesOfElements(final boolean showTypes) {
	SphinxSupportPlugin.getDefault().getDialogSettings().put(SHOW_TYPES_OF_ELEMENTS, showTypes);
	}

	/**
	* @return true shows the type names after the element names, false is standard
	* behavior
	*/
	public boolean isShowTypesOfElements() {
	return SphinxSupportPlugin.getDefault().getDialogSettings().getBoolean(SHOW_TYPES_OF_ELEMENTS);
	}

	/*
	* Register listener for Resource change: here the context is marker deletion
	*/
	public void addResourceChangeListener() {
	ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_CHANGE);
	}

	@Override
	public void resourceChanged(final IResourceChangeEvent event) {
	final IWorkbenchPartSite site = getSite();
	if (site == null) return;

	final IWorkbenchPage page = site.getPage();
	if (page == null) return;

	IEditorPart editorPart = page.getActiveEditor();
	if (!(editorPart instanceof ExtendedBasicTransactionalFormEditor)) return;

	final ExtendedBasicTransactionalFormEditor activeEditor = (ExtendedBasicTransactionalFormEditor) editorPart;

	Display.getDefault().asyncExec(new Runnable() {
	@Override
	public void run() {
	Viewer viewer = activeEditor.getViewer();
	if (viewer != null) {
	viewer.refresh();
	}
	}
	});
	}

	/*
	* Workaround for empty viewer after click on already selected item
	*
	* On Windows some SWT bug avoids repainting of non selected elements. Since the related SWT issue
	* has been discussed for years and no real fix was found, we try to limit the negative effects.
	* See Bugzilla entries: 491737, 458015, 433858.
	*
	* If (1) OS is Windows and (2) theming is enabled then an additional redraw is called explicitly.
	* Users may notice a minor flickering on selection. However, that is surely preferable to not seeing
	* unselected elements at all.
	*/
	@Override
	public void setSelection(ISelection selection) {
	super.setSelection(selection);

	if (Util.isWindows() == false) return; // No Windows OS -> no workaround required

	MApplication application = PlatformUI.getWorkbench().getService(MApplication.class);
	if (application == null) return;

	IEclipseContext context = application.getContext();
	if (context == null) return;

	IThemeEngine engine = context.get(IThemeEngine.class);
	if (engine == null) return; // Theming is not enabled -> no workaround required

	// System.out.println("Theme is " + engine.getActiveTheme().getLabel());

	// * Workaround: additional redraw *
	Viewer viewer = getViewer();
	if (viewer != null) {
	Control control = viewer.getControl();
	if (control != null) {
	control.redraw();
	}
	}
	}

	@Override
	protected void createPages() {
	// check model version
	if (!isFileContainingValidModelNameSpace())
	return;

	super.createPages();
	}

	/**
	* This method is used to check if the file contains valid AMALTHEA model namespace
	* (which is compatible to the current MetaModel)
	* <br>
	* In case if the version of model (associated to the input file) and Meta-Model
	* are different -> Message is shown and Editor is not opened
	*
	*/
	private boolean isFileContainingValidModelNameSpace() {

	if (getEditorInputObject() != null)
	return true; // valid Amalthea resource found

	// Get the IFile object editorInput
	IEditorInput editorInput = getEditorInput();
	IFile iFileObject = EcoreUIUtil.getFileFromEditorInput(editorInput);
	// verify if amlt.no.load.nature is configured.. if so do not load Amalthea model file
	try {
	IProjectNature nature = iFileObject.getProject().getNature("amlt.no.load.nature");

	if (nature != null) {
	// This is the case, Amalthea model should not be loaded

	MessageDialog dialog = new MessageDialog(getSite().getShell(), "AMALTHEA Model Editor", null,
	"File is not loaded as Amalthea \"no load\" nature is configured", MessageDialog.WARNING, 0,
	"OK", "Remove \"no load\" nature");
	int open = dialog.open();
	if (open == 1) {
	// This is the case user has requested to remove the "Amalthea no.load nature"

	ICommandService cmdService = getSite().getService(ICommandService.class);
	Command sampleCommand = cmdService.getCommand("org.eclipse.app4mc.amalthea.noload.nature.remove");

	Map<String, Object> params = new HashMap<>();
	if (open == 1)
	try {
	StructuredSelection selection = new StructuredSelection(iFileObject.getProject());
	EvaluationContext context = new EvaluationContext(null, selection);
	context.addVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME, selection);

	ExecutionEvent event = new ExecutionEvent(sampleCommand, params, null, context);
	sampleCommand.executeWithChecks(event);
	return true;
	} catch (ExecutionException \| NotDefinedException \| NotEnabledException
	\| NotHandledException e) {
	e.printStackTrace();
	}
	} else if (open == 0 \|\| open ==-1) {
	close(false);
	return false;
	}

	}
	} catch (CoreException e) {
	// This is a case where nature might not be associated with IProject (or) nature
	// plugin is missing in the product
	}

	// Verify if the Model descriptor can be fetched from the File
	IModelDescriptor modelDescriptorContent = ModelDescriptorRegistry.INSTANCE.getModel(iFileObject);

	if (modelDescriptorContent != null)
	return true; // valid model descriptor found

	// Get the Meta-Model descriptor belonging to the current version of AMALTHEA meta model plugin
	IMetaModelDescriptor metaModelDescriptor = MetaModelDescriptorRegistry.INSTANCE.getDescriptor(AMALTHEA_MODEL_ID);

	if (metaModelDescriptor == null)
	return true; // undecidable -> delegate the check behaviour to Sphinx

	// Extracting namespace from MetaModel
	String nsURIFromMetaModel = metaModelDescriptor.getRootEPackage().getNsURI();

	// Extracting namespace from Model file
	String nsURIFromModel = EcorePlatformUtil.readModelNamespace(iFileObject);

	if ((nsURIFromMetaModel == null) \|\| (nsURIFromModel == null))
	return true; // undecidable -> delegate the check behaviour to Sphinx

	// * Check for unsupported itea versions (legacy) *

	final String legacyAMALTHEANameSpacePrefix_1 = "http://www.amalthea.itea2.org/model/";
	final String legacyAMALTHEANameSpacePrefix_2 = "http://amalthea.itea2.org/model/";

	if (nsURIFromModel.startsWith(legacyAMALTHEANameSpacePrefix_1)
	\|\| nsURIFromModel.startsWith(legacyAMALTHEANameSpacePrefix_2)) {
	// legacy version detected -> do not open and show error
	MessageDialog.openWarning(getSite().getShell(), "AMALTHEA Model Editor",
	"Unsupported File ! \r\rEditor could not be opened because of a legacy model file that is no longer supported.");

	close(false);
	return false;
	}

	// Extracting AMALTHEA model version
	String versionFromModel = nsURIFromModel.lastIndexOf("/") != -1
	? nsURIFromModel.substring(nsURIFromModel.lastIndexOf("/") + 1)
	: nsURIFromModel;

	// Extracting AMALTHEA metamodel version
	String versionFromMetaModel = nsURIFromMetaModel.lastIndexOf("/") != -1
	? nsURIFromMetaModel.substring(nsURIFromMetaModel.lastIndexOf("/") + 1)
	: nsURIFromMetaModel;

	// * Compare the versions obtained from MetaModel and Model *

	if (versionFromMetaModel.equals(versionFromModel)) {
	// current version detected
	return true;
	}

	String versionMismatchMessage = NLS.bind(
	"Unsupported File ! \r\rEditor could not be opened because of a version mismatch. \r\rFound AMALTHEA model version : {0}\rCurrent editor supports only AMALTHEA model version : {1}",
	new Object[] { versionFromModel, versionFromMetaModel });

	if (Platform.getBundle("org.eclipse.app4mc.amalthea.converters.ui") == null) {
	// migration plugins are not loaded -> show warning
	MessageDialog.openWarning(
	getSite().getShell(), "AMALTHEA Model Editor",
	versionMismatchMessage + "\r\r** AMALTHEA Model Migration utility is not available");
	} else {
	// other APP4MC version detected -> do not open and show migration hint
	MessageDialog dialog = new MessageDialog(
	getSite().getShell(), "AMALTHEA Model Editor", null,
	versionMismatchMessage + "\r\r** Start AMALTHEA Model Migration utility to convert the model",
	MessageDialog.QUESTION_WITH_CANCEL, 0,
	"Migrate to " + versionFromMetaModel, "Show Migration Dialog", "Cancel");
	int open = dialog.open();
	// If user chose Migrate option then the Model Migration command is executed to show the migration dialog
	// IF Start Simple Migration is selected then return value is 0 & for Show Migration Dialog it is 1
	if (open == MessageDialog.OK \|\| open == MessageDialog.CANCEL) {
	ICommandService cmdService = getSite().getService(ICommandService.class);
	Command sampleCommand = cmdService.getCommand("org.eclipse.app4mc.amalthea.modelmigration.dialog.cmd");

	Map<String, String> params = new HashMap<>();
	if (open == MessageDialog.OK)
	params.put("executioncontext", "simplemigration");
	try {
	sampleCommand.executeWithChecks(new ExecutionEvent(sampleCommand, params, null, null));
	} catch (ExecutionException \| NotDefinedException \| NotEnabledException \| NotHandledException e) {
	e.printStackTrace();
	}
	}

	}

	close(false);
	return false;
	}

	}