org.eclipse.ogee.designer/src/org/eclipse/ogee/designer/ODataMultiPageEditor.java - gerrit/ogee/org.eclipse.ogee - Git at Google

 /*******************************************************************************
  *  Copyright (c) 2012-2014 SAP SE.
  *  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:
  *  SAP SE - initial API and implementation and/or initial documentation
  *
  *******************************************************************************/
 package org.eclipse.ogee.designer;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IMarker;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IResourceChangeEvent;
 import org.eclipse.core.resources.IResourceChangeListener;
 import org.eclipse.core.resources.IResourceDelta;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.emf.common.util.URI;
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.emf.ecore.resource.ResourceSet;
 import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
 import org.eclipse.emf.ecore.xmi.XMIResource;
 import org.eclipse.emf.transaction.TransactionalEditingDomain;
 import org.eclipse.gef.GraphicalViewer;
 import org.eclipse.graphiti.ui.editor.DiagramEditorInput;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.viewers.DecorationOverlayIcon;
 import org.eclipse.jface.viewers.IDecoration;
 import org.eclipse.ogee.designer.messages.Messages;
 import org.eclipse.ogee.designer.pages.EDMXReferencePage;
 import org.eclipse.ogee.designer.utils.ArtifactUtil;
 import org.eclipse.ogee.designer.utils.IODataEditorConstants;
 import org.eclipse.ogee.model.api.IModelContext;
 import org.eclipse.ogee.model.api.ModelAPIException;
 import org.eclipse.ogee.model.odata.EDMXSet;
 import org.eclipse.ogee.utils.logger.Logger;
 import org.eclipse.swt.custom.CTabFolder;
 import org.eclipse.swt.custom.CTabFolder2Listener;
 import org.eclipse.swt.custom.CTabFolderEvent;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.IEditorInput;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.IEditorSite;
 import org.eclipse.ui.IFileEditorInput;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.PartInitException;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.ide.ResourceUtil;
 import org.eclipse.ui.part.EditorPart;
 import org.eclipse.ui.part.FileEditorInput;
 import org.eclipse.ui.part.MultiPageEditorPart;
 import org.eclipse.ogee.help.IHelpConstants;

 /**
  * The following class implements a MultiPageEditor with an OData Model Editor &
  * EDMX Reference page.
  *
  */
 public class ODataMultiPageEditor extends MultiPageEditorPart {

 	private CTabFolder tabFolder;
 	private int defaultTabHeight;
 	private ODataEditor designEditor = null;
 	private IFile modelFile;
 	private boolean isSourceDeleted = false;
 	private IFile resource;
 	private Image odataTitleImage;
 	private ODataDiagramListener odataListener;
 	private EDMXReferencePage edmxReferencePage;

 	private boolean isReadOnly = false;

 	/**
 	 * Creates a multi-page editor.
 	 */
 	public ODataMultiPageEditor() {
 		super();
 	}

 	/**
 	 * The resource listener updates the receiver when a change has occurred.
 	 */
 	private IResourceChangeListener resourceListener = new IResourceChangeListener() {

 		/*
 		 * @see IResourceChangeListener#resourceChanged(IResourceChangeEvent)
 		 */
 		@Override
 		public void resourceChanged(IResourceChangeEvent event) {

 			final IResourceDelta mainDelta = event.getDelta();
 			if (mainDelta == null) {
 				return;
 			}
 			final IResourceDelta affectedElement = mainDelta
 					.findMember(getResource().getFullPath());
 			if (affectedElement != null) {
 				this.processDelta(affectedElement);
 			}
 			if (isMarkerChangedForResource(event)) {
 				// Changes in markers on this resource, so re-decorate title
 				// image
 				decorateTitleImage();
 			}
 		}

 		/*
 		 * Checks if there is any change in marker for the resource.
 		 */
 		private boolean isMarkerChangedForResource(
 				final IResourceChangeEvent event) {

 			boolean isMarkerChangeForThisResource = false;

 			if (ResourceUtil.getResource(getEditorInput()) != null) {
 				final IPath path = ResourceUtil.getResource(getEditorInput())
 						.getFullPath();
 				final IResourceDelta delta = event.getDelta().findMember(path);
 				isMarkerChangeForThisResource = (delta != null)
 						&& ((delta.getFlags() & IResourceDelta.MARKERS) != 0);
 			}

 			return isMarkerChangeForThisResource;
 		}

 		/*
 		 * Process the delta for the receiver
 		 */
 		private boolean processDelta(final IResourceDelta delta) {

 			Runnable changeRunnable = null;

 			switch (delta.getKind()) {
 			case IResourceDelta.REMOVED:
 				if ((IResourceDelta.MOVED_TO & delta.getFlags()) != 0) {
 					changeRunnable = new Runnable() {
 						@Override
 						public void run() {
 							final IPath path = delta.getMovedToPath();
 							final IFile newFile = delta.getResource()
 									.getWorkspace().getRoot().getFile(path);
 							if (newFile != null) {
 								sourceChanged(newFile);
 							}
 						}
 					};
 				} else {
 					changeRunnable = new Runnable() {
 						@Override
 						public void run() {
 							setSourceDeleted(true);
 							getSite().getPage().closeEditor(
 									ODataMultiPageEditor.this, true);
 							setDesignEditor(null);
 						}
 					};
 				}
 				break;
 			case IResourceDelta.CHANGED:
 				if ((IResourceDelta.MARKERS & delta.getFlags()) != 0) {
 					changeRunnable = new Runnable() {
 						@Override
 						public void run() {
 							if (getDesignEditor() != null) {
 								getDesignEditor().getDiagramBehavior();
 							}
 						}
 					};
 				}
 				break;
 			default:
 				break;
 			}
 			if (changeRunnable != null) {
 				update(changeRunnable);
 			}

 			return true;
 		}
 	};

 	/**
 	 * decorates the title image with error decorators.
 	 */
 	public void decorateTitleImage() {

 		final Shell shell = this.getEditorSite().getShell();
 		if (shell != null && !shell.isDisposed()) {
 			shell.getDisplay().syncExec(new Runnable() {
 				@Override
 				public void run() {
 					final Image decoratedImage = decorateImage(getTitleImage(),
 							getSeverity());
 					if (decoratedImage != null) {
 						updateTitleImage(decoratedImage);
 					}
 				}
 			});
 		}
 	}

 	/**
 	 * @param image
 	 *            - updated title image with error decorator if any.
 	 */
 	public void updateTitleImage(final Image image) {

 		setTitleImage(image);
 	}

 	protected Image decorateImage(Image titleImage, int severity) {

 		ImageDescriptor descriptor = null;
 		Image decoratedTitleImage = null;

 		if (severity == IMarker.PRIORITY_HIGH) {
 			descriptor = ImageDescriptor.createFromURL(FileLocator.find(
 					Activator.getDefault().getBundle(), new Path(
 							"/icons/error_co.gif"), null)); //$NON-NLS-1$
 		}
 		if (severity == IMarker.PRIORITY_NORMAL) {
 			descriptor = ImageDescriptor.createFromURL(FileLocator.find(
 					Activator.getDefault().getBundle(), new Path(
 							"/icons/warning_co.gif"), null)); //$NON-NLS-1$
 		}
 		if (decoratedTitleImage == null
 				&& (severity == IMarker.PRIORITY_HIGH || severity == IMarker.PRIORITY_NORMAL)) {
 			decoratedTitleImage = new DecorationOverlayIcon(titleImage,
 					descriptor, IDecoration.BOTTOM_LEFT).createImage();
 		} else {
 			descriptor = ImageDescriptor.createFromURL(FileLocator.find(
 					Activator.getDefault().getBundle(), new Path(
 							"/icons/odata.png"), null)); //$NON-NLS-1$
 			if (descriptor != null) {
 				decoratedTitleImage = descriptor.createImage();
 			}
 		}

 		if (decoratedTitleImage == null) {
 			decoratedTitleImage = titleImage;
 		}

 		return decoratedTitleImage;
 	}

 	protected int getSeverity() {

 		int severity = 0;

 		try {
 			if (ResourceUtil.getResource(getEditorInput()) != null) {
 				severity = ResourceUtil.getResource(getEditorInput())
 						.findMaxProblemSeverity(IMarker.PROBLEM, true,
 								IResource.DEPTH_INFINITE);
 			}
 		} catch (CoreException e) {
 			// Might be a project that is not open
 		}

 		return severity;
 	}

 	/**
 	 * The source has changed to the newFile. Update editors and set any
 	 * required flags
 	 *
 	 * @param newFile
 	 *            The file to get the new contents from.
 	 */
 	protected void sourceChanged(IFile newFile) {

 		this.modelFile = newFile;
 		final FileEditorInput newInput = new FileEditorInput(newFile);
 		setInputWithNotify(newInput);
 		setPartName(newInput.getName());
 		setTitleToolTip(newFile.getFullPath().makeRelative().toString());
 		if (getDesignEditor() != null) {
 			getDesignEditor().setModelFile(newFile);
 			getDesignEditor().getDiagramBehavior().refresh();
 		}
 	}

 	/**
 	 * Posts the update code "behind" the running operation.
 	 *
 	 * @param runnable
 	 *            the update code
 	 */
 	protected void update(Runnable runnable) {

 		final IWorkbench workbench = PlatformUI.getWorkbench();
 		final IWorkbenchWindow[] windows = workbench.getWorkbenchWindows();
 		if (windows != null && windows.length > 0) {
 			final Display display = windows[0].getShell().getDisplay();
 			display.asyncExec(runnable);
 		} else {
 			runnable.run();
 		}
 	}

 	/**
 	 * Initializes the editor when created from scratch.
 	 *
 	 * This method is called soon after part construction and marks the start of
 	 * the extension lifecycle. At the end of the extension lifecycle
 	 * <code>shutdown will be invoked
 	 * to terminate the lifecycle.
 	 *
 	 * @param site
 	 * @param input
 	 *            - The initial input element for the editor. In most cases it
 	 *            is an <code>IFile but other types are acceptable.
 	 */
 	@Override
 	public void init(IEditorSite site, IEditorInput input)
 			throws PartInitException {

 		try {
 			if (input instanceof IFileEditorInput) {
 				this.modelFile = ((IFileEditorInput) input).getFile();
 				// OData file is read only
 				this.isReadOnly = ((IFileEditorInput) input).getFile()
 						.isReadOnly();

 			} else if (input instanceof DiagramEditorInput) {
 				URI uri = ((DiagramEditorInput) input).getUri();
 				String uriString = uri.trimFragment().toPlatformString(true);
 				this.modelFile = this.getModelFile(new Path(uriString));
 				// OData file is read only
 				this.isReadOnly = getModelFile(new Path(uriString))
 						.isReadOnly();
 			}
 			setSite(site);
 			setInput(input);
 			setInputWithNotify(input);
 			// Update titles.
 			setTitleToolTip(input.getToolTipText());
 			final ImageDescriptor imageDesc = input.getImageDescriptor();
 			if (imageDesc != null) {
 				this.odataTitleImage = imageDesc.createImage();
 				setTitleImage(this.odataTitleImage);
 			}
 			decorateTitleImage();
 			super.init(site, input);
 		} catch (PartInitException e) {
 			Logger.getLogger(Activator.PLUGIN_ID).logError(e);
 			throw new PartInitException(new Status(IStatus.ERROR,
 					Activator.PLUGIN_ID, e.getMessage(), e));
 		} catch (Exception t) {
 			Logger.getLogger(Activator.PLUGIN_ID).logError(t);
 			throw new PartInitException(new Status(IStatus.ERROR,
 					Activator.PLUGIN_ID, t.getMessage(), t));
 		}
 	}

 	@Override
 	protected void setInputWithNotify(IEditorInput input) {

 		if (input instanceof IFileEditorInput
 				|| input instanceof DiagramEditorInput
 				|| input instanceof ODataEditorInput) {
 			if (this.getResource() == null) {
 				ResourcesPlugin.getWorkspace().addResourceChangeListener(
 						this.resourceListener);
 			}
 			this.setResource(this.modelFile);
 		}

 		super.setInputWithNotify(input);
 	}

 	@Override
 	public void doSave(IProgressMonitor monitor) {

 		if (this.designEditor != null) {
 			this.designEditor.doSave(monitor);
 		}
 		try {
 			if (this.resource != null) {
 				this.resource.refreshLocal(IResource.DEPTH_ZERO, monitor);
 			}
 		} catch (CoreException ex) {
 			// Do nothing on a failed refresh
 		}
 	}

 	@Override
 	public void doSaveAs() {

 		final IEditorPart activeEditor = getActiveEditor();
 		if (activeEditor != null) {
 			activeEditor.doSaveAs();
 		}
 	}

 	@Override
 	public boolean isSaveAsAllowed() {

 		boolean isSaveAsAllowed = false;

 		/*
 		 * Depending upon the active page in multi-page editor, call the
 		 * saveAsAllowed. It helps to see whether a particular editor allows
 		 * 'save as' feature
 		 */
 		final IEditorPart activeEditor = getActiveEditor();
 		if (activeEditor != null) {
 			isSaveAsAllowed = activeEditor.isSaveAsAllowed();
 		}

 		return isSaveAsAllowed;
 	}

 	/*
 	 * See IEditorPart.isSaveOnCloseNeeded()
 	 */
 	@Override
 	public boolean isSaveOnCloseNeeded() {

 		return !this.isSourceDeleted() && super.isSaveOnCloseNeeded();
 	}

 	@Override
 	public void dispose() {

 		super.dispose();

 		if (this.getResource() != null) {
 			ResourcesPlugin.getWorkspace().removeResourceChangeListener(
 					this.resourceListener);
 			this.resourceListener = null;
 			this.setResource(null);
 		}
 		// can dispose the title image because it was created in init
 		if (this.odataTitleImage != null) {
 			this.odataTitleImage.dispose();
 			this.odataTitleImage = null;
 		}
 		if (this.odataListener != null) {
 			this.odataListener.removeListeners();
 			this.odataListener = null;
 		}
 		this.modelFile = null;
 		this.designEditor = null;
 		this.tabFolder = null;
 		if (this.edmxReferencePage != null) {
 			this.edmxReferencePage.dispose();
 			this.edmxReferencePage = null;
 		}
 	}

 	@Override
 	public String getTitle() {

 		if (this.designEditor != null) {

 			return this.designEditor.getTitle();

 		}

 		return super.getTitle();
 	}

 	@Override
 	public String getPartName() {

 		if (this.modelFile != null) {
 			// if odata file is read-only
 			if (this.modelFile.isReadOnly()) {
 				String title = this.modelFile.getName()
 						+ Messages.ODataMultiPageEditor_0;
 				return title;
 			} else {
 				if (IODataEditorConstants.TEMPFILE_EXTENSION
 						.equals(this.modelFile.getFileExtension())) {
 					return this.modelFile.getFullPath().removeFileExtension()
 							.lastSegment();
 				}
 				return this.modelFile.getName();
 			}
 		}

 		return super.getPartName();
 	}

 	@Override
 	public String getTitleToolTip() {

 		if (this.modelFile != null) {
 			if (IODataEditorConstants.TEMPFILE_EXTENSION.equals(this.modelFile
 					.getFileExtension())) {
 				if (this.getEditorInput() instanceof ODataEditorInput) {
 					final ODataEditorInput input = (ODataEditorInput) this
 							.getEditorInput();
 					final String titleToolTip = input.getGWConnectionName()
 							+ "/" + this.modelFile.getFullPath().removeFileExtension().lastSegment(); //$NON-NLS-1$
 					return titleToolTip;
 				}
 				return this.modelFile.getFullPath().removeFileExtension()
 						.lastSegment();
 			}
 			return this.modelFile.getFullPath().makeRelative().toString();
 		}

 		return super.getTitleToolTip();
 	}

 	@Override
 	public void removePage(int pageIndex) {

 		Object page = this.tabFolder.getItem(pageIndex).getData();
 		if (page instanceof EditorPart) {
 			// make sure the editor gets disposed - neither CTabFolder nor super
 			// does this for us!
 			((EditorPart) page).dispose();
 		}
 		super.removePage(pageIndex);
 		updateTabs();
 	}

 	/**
 	 * remove Source Viewer
 	 */
 	public void removeSourceViewer() {

 	}

 	@Override
 	protected void createPages() {

 		this.tabFolder = (CTabFolder) getContainer();
 		this.tabFolder.addCTabFolder2Listener(new CTabFolder2Listener() {
 			@Override
 			public void close(CTabFolderEvent event) {
 			}

 			@Override
 			public void minimize(CTabFolderEvent event) {
 			}

 			@Override
 			public void maximize(CTabFolderEvent event) {
 			}

 			@Override
 			public void restore(CTabFolderEvent event) {
 			}

 			@Override
 			public void showList(CTabFolderEvent event) {
 			}
 		});
 		try {
 			createDesignEditor();
 			// TODO Start - Enable with OData V4 support
 			// createEDMXReferencePage();
 			// End - Enable with OData V4 support
 		} catch (CoreException e) {
 			Logger.getLogger(Activator.PLUGIN_ID).logError(e);
 		}
 	}

 	/**
 	 * @return ODataEditor
 	 */
 	public ODataEditor getDesignEditor() {
 		return this.designEditor;
 	}

 	/**
 	 * @param designEditor
 	 */
 	public void setDesignEditor(final ODataEditor designEditor) {
 		this.designEditor = designEditor;
 	}

 	private void updateTabs() {
 		if (this.tabFolder.getItemCount() == 1) {
 			this.tabFolder.setTabHeight(0);
 		} else {
 			this.tabFolder.setTabHeight(this.defaultTabHeight);
 		}
 		this.tabFolder.layout();
 	}

 	private IFile getModelFile(IPath fullPath) {
 		return ResourcesPlugin.getWorkspace().getRoot()
 				.getFile(fullPath.makeAbsolute());
 	}

 	private void createDesignEditor() throws CoreException {

 		if (this.designEditor == null) {
 			this.designEditor = new DesignEditor();
 			try {
 				int pageIndex = this.tabFolder.getItemCount();
 				addPage(pageIndex, this.designEditor,
 						ODataMultiPageEditor.this.getEditorInput());
 				this.defaultTabHeight = this.tabFolder.getTabHeight();
 				setPageText(pageIndex,
 						Messages.ODATA_MULTIPAGE_EDITOR_MODEL_TAB);
 				this.defaultTabHeight = this.tabFolder.getTabHeight();
 				updateTabs();
 				this.odataListener = new ODataDiagramListener(this.designEditor);
 				this.odataListener.registerListeners();

 			} catch (Exception e) {
 				Logger.getLogger(Activator.PLUGIN_ID).logError(e);
 				throw new CoreException(new Status(IStatus.ERROR,
 						Activator.PLUGIN_ID, e.getMessage(), e));
 			}
 		}
 	}

 	/*
 	 * EDMX References Page.
 	 */
 	private void createEDMXReferencePage() {

 		EDMXSet edmxSet = null;
 		// boolean isReadOnly = false;

 		final IEditorInput editorInput = getEditorInput();
 		// Editor is invoked from IODataDiagramCreator#createDiagram() API.
 		if (editorInput instanceof ODataEditorInput) {
 			final ODataEditorInput odataEditorInput = (ODataEditorInput) getEditorInput();
 			edmxSet = odataEditorInput.getDiagramInput().getEDMXSet();
 			isReadOnly = odataEditorInput.getDiagramInput().isReadOnlyMode();
 		}
 		// Editor is invoked from Project Explorer or when eclipse IDE is
 		// launched.
 		else if (editorInput instanceof FileEditorInput
 				|| editorInput instanceof DiagramEditorInput) {
 			try {
 				final TransactionalEditingDomain editingDomain = IModelContext.INSTANCE
 						.getTransaction(this.modelFile);
 				final String path = this.modelFile.getFullPath().toString();
 				final URI uri = URI.createPlatformResourceURI(path, true);
 				ResourceSet resourceSet = null;
 				if (editingDomain != null) {
 					resourceSet = editingDomain.getResourceSet();
 				} else {
 					resourceSet = new ResourceSetImpl();
 				}
 				final Resource model = resourceSet.getResource(uri, true);
 				if (model instanceof XMIResource) {
 					edmxSet = ArtifactUtil.getEDMXSetFromModel(model);
 				}

 				// OData file is read only
 				if (editorInput instanceof FileEditorInput) {
 					final FileEditorInput fileEditorInput = (FileEditorInput) getEditorInput();
 					this.isReadOnly = fileEditorInput.getFile().isReadOnly();

 				}
 				if (editorInput instanceof DiagramEditorInput) {
 					final DiagramEditorInput diagramEditorInput = (DiagramEditorInput) getEditorInput();
 					final URI uriDiagram = diagramEditorInput.getUri();
 					final String uriString = uriDiagram.trimFragment()
 							.toPlatformString(true);
 					this.isReadOnly = getModelFile(new Path(uriString))
 							.isReadOnly();
 				}

 			} catch (ModelAPIException e) {
 				Logger.getLogger(Activator.PLUGIN_ID).logError(e);
 			}
 		}
 		final int pageIndex = this.tabFolder.getItemCount();
 		this.edmxReferencePage = new EDMXReferencePage(this.getContainer(),
 				edmxSet, isReadOnly, getEditorSite(), getDesignEditor());
 		addPage(this.edmxReferencePage);
 		this.tabFolder.getItem(pageIndex).setShowClose(false);
 		setPageText(pageIndex, Messages.ODATA_MULTIPAGE_EDITOR_REF_TAB);
 		updateTabs();
 	}

 	/**
 	 * @return an instance of IFile
 	 */
 	public IFile getResource() {

 		return this.resource;
 	}

 	/**
 	 * @param resource
 	 *            - IFile
 	 */
 	public void setResource(final IFile resource) {

 		this.resource = resource;
 	}

 	/**
 	 * The isSourceDeleted flag makes sure that the receiver is not dirty when
 	 * shutting down.
 	 *
 	 * @return boolean is Source Deleted
 	 */
 	public boolean isSourceDeleted() {

 		return this.isSourceDeleted;
 	}

 	/**
 	 * The isSourceDeleted flag makes sure that the receiver is not dirty when
 	 * shutting down.
 	 *
 	 * @param isSourceDeleted
 	 *            - boolean
 	 */
 	public void setSourceDeleted(boolean isSourceDeleted) {

 		this.isSourceDeleted = isSourceDeleted;
 	}

 	/**
 	 * @author I057523
 	 *
 	 */
 	public class DesignEditor extends ODataEditor {

 		@Override
 		protected void createActions() {
 			super.createActions();
 		}
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.ui.part.MultiPageEditorPart#setFocus()
 	 */
 	@Override
 	public void setFocus() {

 		super.setFocus();
 		int activePage = getActivePage();
 		switch (activePage) {
 		case 0:

 			if (this.designEditor != null) {
 				final GraphicalViewer graphicalViewer = this.designEditor
 						.getGraphicalViewer();
 				if (graphicalViewer != null) {
 					final Control control = graphicalViewer.getControl();
 					/*PlatformUI
 							.getWorkbench()
 							.getHelpSystem()
 							.setHelp(control,
 									IODataEditorConstants.HELP_CONTEXT_ID);*/
 					PlatformUI.getWorkbench().getHelpSystem()
 					.setHelp(control, IHelpConstants.HELP_CONTEXT_ID);
 				}
 			}
 			break;
 		case 1:
 			/*PlatformUI
 					.getWorkbench()
 					.getHelpSystem()
 					.setHelp(
 							this.edmxReferencePage,
 							IODataEditorConstants.HELP_CONTEXT_ID_EDMXREFERENCES);*/
 			PlatformUI
 			.getWorkbench()
 			.getHelpSystem()
 			.setHelp(this.edmxReferencePage,
 					IHelpConstants.HELP_CONTEXT_ID_EDMXREFERENCES);

 			break;
 		default:
 			break;
 		}

 	}

 	/**
 	 * @return instance of EDMXReferencePage.
 	 */
 	public EDMXReferencePage getEdmxReferencePage() {

 		return this.edmxReferencePage;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2012-2014 SAP SE.
	* 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:
	* SAP SE - initial API and implementation and/or initial documentation
	*
	*******************************************************************************/
	package org.eclipse.ogee.designer;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IMarker;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IResourceChangeEvent;
	import org.eclipse.core.resources.IResourceChangeListener;
	import org.eclipse.core.resources.IResourceDelta;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.FileLocator;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.emf.common.util.URI;
	import org.eclipse.emf.ecore.resource.Resource;
	import org.eclipse.emf.ecore.resource.ResourceSet;
	import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
	import org.eclipse.emf.ecore.xmi.XMIResource;
	import org.eclipse.emf.transaction.TransactionalEditingDomain;
	import org.eclipse.gef.GraphicalViewer;
	import org.eclipse.graphiti.ui.editor.DiagramEditorInput;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.viewers.DecorationOverlayIcon;
	import org.eclipse.jface.viewers.IDecoration;
	import org.eclipse.ogee.designer.messages.Messages;
	import org.eclipse.ogee.designer.pages.EDMXReferencePage;
	import org.eclipse.ogee.designer.utils.ArtifactUtil;
	import org.eclipse.ogee.designer.utils.IODataEditorConstants;
	import org.eclipse.ogee.model.api.IModelContext;
	import org.eclipse.ogee.model.api.ModelAPIException;
	import org.eclipse.ogee.model.odata.EDMXSet;
	import org.eclipse.ogee.utils.logger.Logger;
	import org.eclipse.swt.custom.CTabFolder;
	import org.eclipse.swt.custom.CTabFolder2Listener;
	import org.eclipse.swt.custom.CTabFolderEvent;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.ui.IEditorInput;
	import org.eclipse.ui.IEditorPart;
	import org.eclipse.ui.IEditorSite;
	import org.eclipse.ui.IFileEditorInput;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchWindow;
	import org.eclipse.ui.PartInitException;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.ide.ResourceUtil;
	import org.eclipse.ui.part.EditorPart;
	import org.eclipse.ui.part.FileEditorInput;
	import org.eclipse.ui.part.MultiPageEditorPart;
	import org.eclipse.ogee.help.IHelpConstants;

	/**
	* The following class implements a MultiPageEditor with an OData Model Editor &
	* EDMX Reference page.
	*
	*/
	public class ODataMultiPageEditor extends MultiPageEditorPart {

	private CTabFolder tabFolder;
	private int defaultTabHeight;
	private ODataEditor designEditor = null;
	private IFile modelFile;
	private boolean isSourceDeleted = false;
	private IFile resource;
	private Image odataTitleImage;
	private ODataDiagramListener odataListener;
	private EDMXReferencePage edmxReferencePage;

	private boolean isReadOnly = false;

	/**
	* Creates a multi-page editor.
	*/
	public ODataMultiPageEditor() {
	super();
	}

	/**
	* The resource listener updates the receiver when a change has occurred.
	*/
	private IResourceChangeListener resourceListener = new IResourceChangeListener() {

	/*
	* @see IResourceChangeListener#resourceChanged(IResourceChangeEvent)
	*/
	@Override
	public void resourceChanged(IResourceChangeEvent event) {

	final IResourceDelta mainDelta = event.getDelta();
	if (mainDelta == null) {
	return;
	}
	final IResourceDelta affectedElement = mainDelta
	.findMember(getResource().getFullPath());
	if (affectedElement != null) {
	this.processDelta(affectedElement);
	}
	if (isMarkerChangedForResource(event)) {
	// Changes in markers on this resource, so re-decorate title
	// image
	decorateTitleImage();
	}
	}

	/*
	* Checks if there is any change in marker for the resource.
	*/
	private boolean isMarkerChangedForResource(
	final IResourceChangeEvent event) {

	boolean isMarkerChangeForThisResource = false;

	if (ResourceUtil.getResource(getEditorInput()) != null) {
	final IPath path = ResourceUtil.getResource(getEditorInput())
	.getFullPath();
	final IResourceDelta delta = event.getDelta().findMember(path);
	isMarkerChangeForThisResource = (delta != null)
	&& ((delta.getFlags() & IResourceDelta.MARKERS) != 0);
	}

	return isMarkerChangeForThisResource;
	}

	/*
	* Process the delta for the receiver
	*/
	private boolean processDelta(final IResourceDelta delta) {

	Runnable changeRunnable = null;

	switch (delta.getKind()) {
	case IResourceDelta.REMOVED:
	if ((IResourceDelta.MOVED_TO & delta.getFlags()) != 0) {
	changeRunnable = new Runnable() {
	@Override
	public void run() {
	final IPath path = delta.getMovedToPath();
	final IFile newFile = delta.getResource()
	.getWorkspace().getRoot().getFile(path);
	if (newFile != null) {
	sourceChanged(newFile);
	}
	}
	};
	} else {
	changeRunnable = new Runnable() {
	@Override
	public void run() {
	setSourceDeleted(true);
	getSite().getPage().closeEditor(
	ODataMultiPageEditor.this, true);
	setDesignEditor(null);
	}
	};
	}
	break;
	case IResourceDelta.CHANGED:
	if ((IResourceDelta.MARKERS & delta.getFlags()) != 0) {
	changeRunnable = new Runnable() {
	@Override
	public void run() {
	if (getDesignEditor() != null) {
	getDesignEditor().getDiagramBehavior();
	}
	}
	};
	}
	break;
	default:
	break;
	}
	if (changeRunnable != null) {
	update(changeRunnable);
	}

	return true;
	}
	};

	/**
	* decorates the title image with error decorators.
	*/
	public void decorateTitleImage() {

	final Shell shell = this.getEditorSite().getShell();
	if (shell != null && !shell.isDisposed()) {
	shell.getDisplay().syncExec(new Runnable() {
	@Override
	public void run() {
	final Image decoratedImage = decorateImage(getTitleImage(),
	getSeverity());
	if (decoratedImage != null) {
	updateTitleImage(decoratedImage);
	}
	}
	});
	}
	}

	/**
	* @param image
	* - updated title image with error decorator if any.
	*/
	public void updateTitleImage(final Image image) {

	setTitleImage(image);
	}

	protected Image decorateImage(Image titleImage, int severity) {

	ImageDescriptor descriptor = null;
	Image decoratedTitleImage = null;

	if (severity == IMarker.PRIORITY_HIGH) {
	descriptor = ImageDescriptor.createFromURL(FileLocator.find(
	Activator.getDefault().getBundle(), new Path(
	"/icons/error_co.gif"), null)); //$NON-NLS-1$
	}
	if (severity == IMarker.PRIORITY_NORMAL) {
	descriptor = ImageDescriptor.createFromURL(FileLocator.find(
	Activator.getDefault().getBundle(), new Path(
	"/icons/warning_co.gif"), null)); //$NON-NLS-1$
	}
	if (decoratedTitleImage == null
	&& (severity == IMarker.PRIORITY_HIGH \|\| severity == IMarker.PRIORITY_NORMAL)) {
	decoratedTitleImage = new DecorationOverlayIcon(titleImage,
	descriptor, IDecoration.BOTTOM_LEFT).createImage();
	} else {
	descriptor = ImageDescriptor.createFromURL(FileLocator.find(
	Activator.getDefault().getBundle(), new Path(
	"/icons/odata.png"), null)); //$NON-NLS-1$
	if (descriptor != null) {
	decoratedTitleImage = descriptor.createImage();
	}
	}

	if (decoratedTitleImage == null) {
	decoratedTitleImage = titleImage;
	}

	return decoratedTitleImage;
	}

	protected int getSeverity() {

	int severity = 0;

	try {
	if (ResourceUtil.getResource(getEditorInput()) != null) {
	severity = ResourceUtil.getResource(getEditorInput())
	.findMaxProblemSeverity(IMarker.PROBLEM, true,
	IResource.DEPTH_INFINITE);
	}
	} catch (CoreException e) {
	// Might be a project that is not open
	}

	return severity;
	}

	/**
	* The source has changed to the newFile. Update editors and set any
	* required flags
	*
	* @param newFile
	* The file to get the new contents from.
	*/
	protected void sourceChanged(IFile newFile) {

	this.modelFile = newFile;
	final FileEditorInput newInput = new FileEditorInput(newFile);
	setInputWithNotify(newInput);
	setPartName(newInput.getName());
	setTitleToolTip(newFile.getFullPath().makeRelative().toString());
	if (getDesignEditor() != null) {
	getDesignEditor().setModelFile(newFile);
	getDesignEditor().getDiagramBehavior().refresh();
	}
	}

	/**
	* Posts the update code "behind" the running operation.
	*
	* @param runnable
	* the update code
	*/
	protected void update(Runnable runnable) {

	final IWorkbench workbench = PlatformUI.getWorkbench();
	final IWorkbenchWindow[] windows = workbench.getWorkbenchWindows();
	if (windows != null && windows.length > 0) {
	final Display display = windows[0].getShell().getDisplay();
	display.asyncExec(runnable);
	} else {
	runnable.run();
	}
	}

	/**
	* Initializes the editor when created from scratch.
	*
	* This method is called soon after part construction and marks the start of
	* the extension lifecycle. At the end of the extension lifecycle
	* <code>shutdown will be invoked
	* to terminate the lifecycle.
	*
	* @param site
	* @param input
	* - The initial input element for the editor. In most cases it
	* is an <code>IFile but other types are acceptable.
	*/
	@Override
	public void init(IEditorSite site, IEditorInput input)
	throws PartInitException {

	try {
	if (input instanceof IFileEditorInput) {
	this.modelFile = ((IFileEditorInput) input).getFile();
	// OData file is read only
	this.isReadOnly = ((IFileEditorInput) input).getFile()
	.isReadOnly();

	} else if (input instanceof DiagramEditorInput) {
	URI uri = ((DiagramEditorInput) input).getUri();
	String uriString = uri.trimFragment().toPlatformString(true);
	this.modelFile = this.getModelFile(new Path(uriString));
	// OData file is read only
	this.isReadOnly = getModelFile(new Path(uriString))
	.isReadOnly();
	}
	setSite(site);
	setInput(input);
	setInputWithNotify(input);
	// Update titles.
	setTitleToolTip(input.getToolTipText());
	final ImageDescriptor imageDesc = input.getImageDescriptor();
	if (imageDesc != null) {
	this.odataTitleImage = imageDesc.createImage();
	setTitleImage(this.odataTitleImage);
	}
	decorateTitleImage();
	super.init(site, input);
	} catch (PartInitException e) {
	Logger.getLogger(Activator.PLUGIN_ID).logError(e);
	throw new PartInitException(new Status(IStatus.ERROR,
	Activator.PLUGIN_ID, e.getMessage(), e));
	} catch (Exception t) {
	Logger.getLogger(Activator.PLUGIN_ID).logError(t);
	throw new PartInitException(new Status(IStatus.ERROR,
	Activator.PLUGIN_ID, t.getMessage(), t));
	}
	}

	@Override
	protected void setInputWithNotify(IEditorInput input) {

	if (input instanceof IFileEditorInput
	\|\| input instanceof DiagramEditorInput
	\|\| input instanceof ODataEditorInput) {
	if (this.getResource() == null) {
	ResourcesPlugin.getWorkspace().addResourceChangeListener(
	this.resourceListener);
	}
	this.setResource(this.modelFile);
	}

	super.setInputWithNotify(input);
	}

	@Override
	public void doSave(IProgressMonitor monitor) {

	if (this.designEditor != null) {
	this.designEditor.doSave(monitor);
	}
	try {
	if (this.resource != null) {
	this.resource.refreshLocal(IResource.DEPTH_ZERO, monitor);
	}
	} catch (CoreException ex) {
	// Do nothing on a failed refresh
	}
	}

	@Override
	public void doSaveAs() {

	final IEditorPart activeEditor = getActiveEditor();
	if (activeEditor != null) {
	activeEditor.doSaveAs();
	}
	}

	@Override
	public boolean isSaveAsAllowed() {

	boolean isSaveAsAllowed = false;

	/*
	* Depending upon the active page in multi-page editor, call the
	* saveAsAllowed. It helps to see whether a particular editor allows
	* 'save as' feature
	*/
	final IEditorPart activeEditor = getActiveEditor();
	if (activeEditor != null) {
	isSaveAsAllowed = activeEditor.isSaveAsAllowed();
	}

	return isSaveAsAllowed;
	}

	/*
	* See IEditorPart.isSaveOnCloseNeeded()
	*/
	@Override
	public boolean isSaveOnCloseNeeded() {

	return !this.isSourceDeleted() && super.isSaveOnCloseNeeded();
	}

	@Override
	public void dispose() {

	super.dispose();

	if (this.getResource() != null) {
	ResourcesPlugin.getWorkspace().removeResourceChangeListener(
	this.resourceListener);
	this.resourceListener = null;
	this.setResource(null);
	}
	// can dispose the title image because it was created in init
	if (this.odataTitleImage != null) {
	this.odataTitleImage.dispose();
	this.odataTitleImage = null;
	}
	if (this.odataListener != null) {
	this.odataListener.removeListeners();
	this.odataListener = null;
	}
	this.modelFile = null;
	this.designEditor = null;
	this.tabFolder = null;
	if (this.edmxReferencePage != null) {
	this.edmxReferencePage.dispose();
	this.edmxReferencePage = null;
	}
	}

	@Override
	public String getTitle() {

	if (this.designEditor != null) {

	return this.designEditor.getTitle();

	}

	return super.getTitle();
	}

	@Override
	public String getPartName() {

	if (this.modelFile != null) {
	// if odata file is read-only
	if (this.modelFile.isReadOnly()) {
	String title = this.modelFile.getName()
	+ Messages.ODataMultiPageEditor_0;
	return title;
	} else {
	if (IODataEditorConstants.TEMPFILE_EXTENSION
	.equals(this.modelFile.getFileExtension())) {
	return this.modelFile.getFullPath().removeFileExtension()
	.lastSegment();
	}
	return this.modelFile.getName();
	}
	}

	return super.getPartName();
	}

	@Override
	public String getTitleToolTip() {

	if (this.modelFile != null) {
	if (IODataEditorConstants.TEMPFILE_EXTENSION.equals(this.modelFile
	.getFileExtension())) {
	if (this.getEditorInput() instanceof ODataEditorInput) {
	final ODataEditorInput input = (ODataEditorInput) this
	.getEditorInput();
	final String titleToolTip = input.getGWConnectionName()
	+ "/" + this.modelFile.getFullPath().removeFileExtension().lastSegment(); //$NON-NLS-1$
	return titleToolTip;
	}
	return this.modelFile.getFullPath().removeFileExtension()
	.lastSegment();
	}
	return this.modelFile.getFullPath().makeRelative().toString();
	}

	return super.getTitleToolTip();
	}

	@Override
	public void removePage(int pageIndex) {

	Object page = this.tabFolder.getItem(pageIndex).getData();
	if (page instanceof EditorPart) {
	// make sure the editor gets disposed - neither CTabFolder nor super
	// does this for us!
	((EditorPart) page).dispose();
	}
	super.removePage(pageIndex);
	updateTabs();
	}

	/**
	* remove Source Viewer
	*/
	public void removeSourceViewer() {

	}

	@Override
	protected void createPages() {

	this.tabFolder = (CTabFolder) getContainer();
	this.tabFolder.addCTabFolder2Listener(new CTabFolder2Listener() {
	@Override
	public void close(CTabFolderEvent event) {
	}

	@Override
	public void minimize(CTabFolderEvent event) {
	}

	@Override
	public void maximize(CTabFolderEvent event) {
	}

	@Override
	public void restore(CTabFolderEvent event) {
	}

	@Override
	public void showList(CTabFolderEvent event) {
	}
	});
	try {
	createDesignEditor();
	// TODO Start - Enable with OData V4 support
	// createEDMXReferencePage();
	// End - Enable with OData V4 support
	} catch (CoreException e) {
	Logger.getLogger(Activator.PLUGIN_ID).logError(e);
	}
	}

	/**
	* @return ODataEditor
	*/
	public ODataEditor getDesignEditor() {
	return this.designEditor;
	}

	/**
	* @param designEditor
	*/
	public void setDesignEditor(final ODataEditor designEditor) {
	this.designEditor = designEditor;
	}

	private void updateTabs() {
	if (this.tabFolder.getItemCount() == 1) {
	this.tabFolder.setTabHeight(0);
	} else {
	this.tabFolder.setTabHeight(this.defaultTabHeight);
	}
	this.tabFolder.layout();
	}

	private IFile getModelFile(IPath fullPath) {
	return ResourcesPlugin.getWorkspace().getRoot()
	.getFile(fullPath.makeAbsolute());
	}

	private void createDesignEditor() throws CoreException {

	if (this.designEditor == null) {
	this.designEditor = new DesignEditor();
	try {
	int pageIndex = this.tabFolder.getItemCount();
	addPage(pageIndex, this.designEditor,
	ODataMultiPageEditor.this.getEditorInput());
	this.defaultTabHeight = this.tabFolder.getTabHeight();
	setPageText(pageIndex,
	Messages.ODATA_MULTIPAGE_EDITOR_MODEL_TAB);
	this.defaultTabHeight = this.tabFolder.getTabHeight();
	updateTabs();
	this.odataListener = new ODataDiagramListener(this.designEditor);
	this.odataListener.registerListeners();

	} catch (Exception e) {
	Logger.getLogger(Activator.PLUGIN_ID).logError(e);
	throw new CoreException(new Status(IStatus.ERROR,
	Activator.PLUGIN_ID, e.getMessage(), e));
	}
	}
	}

	/*
	* EDMX References Page.
	*/
	private void createEDMXReferencePage() {

	EDMXSet edmxSet = null;
	// boolean isReadOnly = false;

	final IEditorInput editorInput = getEditorInput();
	// Editor is invoked from IODataDiagramCreator#createDiagram() API.
	if (editorInput instanceof ODataEditorInput) {
	final ODataEditorInput odataEditorInput = (ODataEditorInput) getEditorInput();
	edmxSet = odataEditorInput.getDiagramInput().getEDMXSet();
	isReadOnly = odataEditorInput.getDiagramInput().isReadOnlyMode();
	}
	// Editor is invoked from Project Explorer or when eclipse IDE is
	// launched.
	else if (editorInput instanceof FileEditorInput
	\|\| editorInput instanceof DiagramEditorInput) {
	try {
	final TransactionalEditingDomain editingDomain = IModelContext.INSTANCE
	.getTransaction(this.modelFile);
	final String path = this.modelFile.getFullPath().toString();
	final URI uri = URI.createPlatformResourceURI(path, true);
	ResourceSet resourceSet = null;
	if (editingDomain != null) {
	resourceSet = editingDomain.getResourceSet();
	} else {
	resourceSet = new ResourceSetImpl();
	}
	final Resource model = resourceSet.getResource(uri, true);
	if (model instanceof XMIResource) {
	edmxSet = ArtifactUtil.getEDMXSetFromModel(model);
	}

	// OData file is read only
	if (editorInput instanceof FileEditorInput) {
	final FileEditorInput fileEditorInput = (FileEditorInput) getEditorInput();
	this.isReadOnly = fileEditorInput.getFile().isReadOnly();

	}
	if (editorInput instanceof DiagramEditorInput) {
	final DiagramEditorInput diagramEditorInput = (DiagramEditorInput) getEditorInput();
	final URI uriDiagram = diagramEditorInput.getUri();
	final String uriString = uriDiagram.trimFragment()
	.toPlatformString(true);
	this.isReadOnly = getModelFile(new Path(uriString))
	.isReadOnly();
	}

	} catch (ModelAPIException e) {
	Logger.getLogger(Activator.PLUGIN_ID).logError(e);
	}
	}
	final int pageIndex = this.tabFolder.getItemCount();
	this.edmxReferencePage = new EDMXReferencePage(this.getContainer(),
	edmxSet, isReadOnly, getEditorSite(), getDesignEditor());
	addPage(this.edmxReferencePage);
	this.tabFolder.getItem(pageIndex).setShowClose(false);
	setPageText(pageIndex, Messages.ODATA_MULTIPAGE_EDITOR_REF_TAB);
	updateTabs();
	}

	/**
	* @return an instance of IFile
	*/
	public IFile getResource() {

	return this.resource;
	}

	/**
	* @param resource
	* - IFile
	*/
	public void setResource(final IFile resource) {

	this.resource = resource;
	}

	/**
	* The isSourceDeleted flag makes sure that the receiver is not dirty when
	* shutting down.
	*
	* @return boolean is Source Deleted
	*/
	public boolean isSourceDeleted() {

	return this.isSourceDeleted;
	}

	/**
	* The isSourceDeleted flag makes sure that the receiver is not dirty when
	* shutting down.
	*
	* @param isSourceDeleted
	* - boolean
	*/
	public void setSourceDeleted(boolean isSourceDeleted) {

	this.isSourceDeleted = isSourceDeleted;
	}

	/**
	* @author I057523
	*
	*/
	public class DesignEditor extends ODataEditor {

	@Override
	protected void createActions() {
	super.createActions();
	}
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.ui.part.MultiPageEditorPart#setFocus()
	*/
	@Override
	public void setFocus() {

	super.setFocus();
	int activePage = getActivePage();
	switch (activePage) {
	case 0:

	if (this.designEditor != null) {
	final GraphicalViewer graphicalViewer = this.designEditor
	.getGraphicalViewer();
	if (graphicalViewer != null) {
	final Control control = graphicalViewer.getControl();
	/*PlatformUI
	.getWorkbench()
	.getHelpSystem()
	.setHelp(control,
	IODataEditorConstants.HELP_CONTEXT_ID);*/
	PlatformUI.getWorkbench().getHelpSystem()
	.setHelp(control, IHelpConstants.HELP_CONTEXT_ID);
	}
	}
	break;
	case 1:
	/*PlatformUI
	.getWorkbench()
	.getHelpSystem()
	.setHelp(
	this.edmxReferencePage,
	IODataEditorConstants.HELP_CONTEXT_ID_EDMXREFERENCES);*/
	PlatformUI
	.getWorkbench()
	.getHelpSystem()
	.setHelp(this.edmxReferencePage,
	IHelpConstants.HELP_CONTEXT_ID_EDMXREFERENCES);

	break;
	default:
	break;
	}

	}

	/**
	* @return instance of EDMXReferencePage.
	*/
	public EDMXReferencePage getEdmxReferencePage() {

	return this.edmxReferencePage;
	}

	}