/*******************************************************************************
 * Copyright (c) 2011, 2013 Formal Mind GmbH and University of Dusseldorf.
 * 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:
 *     Michael Jastram - initial API and implementation
 ******************************************************************************/

package org.eclipse.rmf.reqif10.pror.editor.presentation;

import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EventObject;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.UUID;

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.IResourceDeltaVisitor;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.emf.common.command.BasicCommandStack;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CommandStack;
import org.eclipse.emf.common.command.CommandStackListener;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.ui.MarkerHelper;
import org.eclipse.emf.common.ui.ViewerPane;
import org.eclipse.emf.common.ui.editor.ProblemEditorPart;
import org.eclipse.emf.common.ui.viewer.IViewerProvider;
import org.eclipse.emf.common.util.BasicDiagnostic;
import org.eclipse.emf.common.util.Diagnostic;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EValidator;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.util.EContentAdapter;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.command.SetCommand;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.domain.IEditingDomainProvider;
import org.eclipse.emf.edit.provider.AdapterFactoryItemDelegator;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory;
import org.eclipse.emf.edit.provider.resource.ResourceItemProviderAdapterFactory;
import org.eclipse.emf.edit.ui.action.EditingDomainActionBarContributor;
import org.eclipse.emf.edit.ui.dnd.EditingDomainViewerDropAdapter;
import org.eclipse.emf.edit.ui.dnd.LocalTransfer;
import org.eclipse.emf.edit.ui.dnd.ViewerDragAdapter;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
import org.eclipse.emf.edit.ui.provider.UnwrappingSelectionProvider;
import org.eclipse.emf.edit.ui.util.EditUIMarkerHelper;
import org.eclipse.emf.edit.ui.util.EditUIUtil;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IStatusLineManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.rmf.reqif10.AttributeValue;
import org.eclipse.rmf.reqif10.AttributeValueXHTML;
import org.eclipse.rmf.reqif10.ReqIF;
import org.eclipse.rmf.reqif10.ReqIF10Factory;
import org.eclipse.rmf.reqif10.ReqIF10Package;
import org.eclipse.rmf.reqif10.ReqIFContent;
import org.eclipse.rmf.reqif10.SpecObject;
import org.eclipse.rmf.reqif10.Specification;
import org.eclipse.rmf.reqif10.XhtmlContent;
import org.eclipse.rmf.reqif10.pror.configuration.provider.ConfigurationItemProviderAdapterFactory;
import org.eclipse.rmf.reqif10.pror.editor.IReqifEditor;
import org.eclipse.rmf.reqif10.pror.editor.ISpecificationEditor;
import org.eclipse.rmf.reqif10.pror.editor.presentation.service.PresentationServiceManager;
import org.eclipse.rmf.reqif10.pror.editor.propertiesview.ProrPropertySheetPage;
import org.eclipse.rmf.reqif10.pror.provider.ReqIF10ItemProviderAdapterFactory;
import org.eclipse.rmf.reqif10.pror.provider.VirtualDatatypeDefinitionItemProvider;
import org.eclipse.rmf.reqif10.pror.provider.VirtualSpecTypeItemProvider;
import org.eclipse.rmf.reqif10.pror.util.ConfigurationUtil;
import org.eclipse.rmf.reqif10.xhtml.provider.XhtmlItemProviderAdapterFactory;
import org.eclipse.sphinx.emf.serialization.XMLPersistenceMappingResource;
import org.eclipse.sphinx.emf.serialization.XMLPersistenceMappingResourceSetImpl;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IPartListener;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.actions.WorkspaceModifyOperation;
import org.eclipse.ui.dialogs.SaveAsDialog;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.ide.IGotoMarker;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.part.MultiPageEditorPart;
import org.eclipse.ui.views.contentoutline.ContentOutline;
import org.eclipse.ui.views.contentoutline.ContentOutlinePage;
import org.eclipse.ui.views.contentoutline.IContentOutlinePage;
import org.eclipse.ui.views.properties.IPropertySheetPage;
import org.eclipse.ui.views.properties.PropertySheet;
import org.eclipse.ui.views.properties.PropertySheetPage;

/**
 * This is an example of a Reqif10 model editor. <!-- begin-user-doc --> We
 * modified the generated Editor as little as possible to keep the benefits of
 * working Code. Note that this Editor doesn't do that much. The
 * {@link ISpecificationEditor} is much more important and powerful. It uses some
 * elements from this Editor, however (PropertyView, OutlineView...) <!--
 * end-user-doc -->
 * 
 * @generated
 */
public class Reqif10Editor extends MultiPageEditorPart implements
		IReqifEditor, IMenuListener,
		IViewerProvider, IGotoMarker {

	/**
	 * Debugging shows the complete tree in the outline.
	 */
	private boolean DEBUG = false;

	/**
	 * This keeps track of the editing domain that is used to track all changes
	 * to the model. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected AdapterFactoryEditingDomain editingDomain;

	/**
	 * This is the one adapter factory used for providing views of the model.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected ComposedAdapterFactory adapterFactory;

	/**
	 * This is the content outline page. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected IContentOutlinePage contentOutlinePage;

	/**
	 * This is a kludge... <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected IStatusLineManager contentOutlineStatusLineManager;

	/**
	 * This is the content outline page's viewer. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected TreeViewer contentOutlineViewer;

	/**
	 * This is the property sheet page. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected ProrPropertySheetPage propertySheetPage;

	/**
	 * This is the viewer that shadows the selection in the content outline. The
	 * parent relation must be correctly defined for this to work. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected TreeViewer selectionViewer;

	/**
	 * This inverts the roll of parent and child in the content provider and
	 * show parents as a tree. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected TreeViewer parentViewer;

	/**
	 * This shows how a tree view works. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected TreeViewer treeViewer;

	/**
	 * This shows how a list view works. A list viewer doesn't support icons.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected ListViewer listViewer;

	/**
	 * This shows how a table view works. A table can be used as a list with
	 * icons. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected TableViewer tableViewer;

	/**
	 * This shows how a tree view with columns works. <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected TreeViewer treeViewerWithColumns;

	/**
	 * This keeps track of the active viewer pane, in the book. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected ViewerPane currentViewerPane;

	/**
	 * This keeps track of the active content viewer, which may be either one of
	 * the viewers in the pages or the content outline viewer. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected Viewer currentViewer;

	/**
	 * This listens to which ever viewer is active. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected ISelectionChangedListener selectionChangedListener;

	/**
	 * This keeps track of all the
	 * {@link org.eclipse.jface.viewers.ISelectionChangedListener}s that are
	 * listening to this editor. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected Collection<ISelectionChangedListener> selectionChangedListeners = new ArrayList<ISelectionChangedListener>();

	/**
	 * This keeps track of the selection of the editor as a whole. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected ISelection editorSelection = StructuredSelection.EMPTY;

	/**
	 * The MarkerHelper is responsible for creating workspace resource markers
	 * presented in Eclipse's Problems View. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected MarkerHelper markerHelper = new EditUIMarkerHelper();

	/**
	 * This listens for when the outline becomes active <!-- begin-user-doc -->
	 * Implemented the partClosed method in order to close all referenced
	 * specification editors. <!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	protected IPartListener partListener = new IPartListener() {
		public void partActivated(IWorkbenchPart p) {
			if (p instanceof ContentOutline) {
				if (((ContentOutline) p).getCurrentPage() == contentOutlinePage) {
					getActionBarContributor().setActiveEditor(
							Reqif10Editor.this);

					setCurrentViewer(contentOutlineViewer);
				}
			} else if (p instanceof PropertySheet) {
				if (((PropertySheet) p).getCurrentPage() == propertySheetPage) {
					getActionBarContributor().setActiveEditor(
							Reqif10Editor.this);
					handleActivate();
				}
			} else if (p == Reqif10Editor.this) {
				handleActivate();
			}
		}

		public void partBroughtToTop(IWorkbenchPart p) {
			// Ignore.
		}

		public void partClosed(IWorkbenchPart p) {
			if (p.equals(Reqif10Editor.this))
				closeAssociatedSpecEditors(getEditorSite());
		}

		public void partDeactivated(IWorkbenchPart p) {
			// Ignore.
		}

		public void partOpened(IWorkbenchPart p) {
			// Ignore.
		}
	};

	/**
	 * Resources that have been removed since last activation. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected Collection<Resource> removedResources = new ArrayList<Resource>();

	/**
	 * Resources that have been changed since last activation. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected Collection<Resource> changedResources = new ArrayList<Resource>();

	/**
	 * Resources that have been saved. <!-- begin-user-doc --> <!-- end-user-doc
	 * -->
	 * 
	 * @generated
	 */
	protected Collection<Resource> savedResources = new ArrayList<Resource>();

	/**
	 * Map to store the diagnostic associated with a resource. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected Map<Resource, Diagnostic> resourceToDiagnosticMap = new LinkedHashMap<Resource, Diagnostic>();

	/**
	 * Controls whether the problem indication should be updated. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected boolean updateProblemIndication = true;

	/**
	 * The {@link ReqIf} that this editor shows.
	 */
	private ReqIF reqif;

	/**
	 * Adapter used to update the problem indication when resources are demanded
	 * loaded. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected EContentAdapter problemIndicationAdapter = new EContentAdapter() {
		@Override
		public void notifyChanged(Notification notification) {
			if (notification.getNotifier() instanceof Resource) {
				switch (notification.getFeatureID(Resource.class)) {
				case Resource.RESOURCE__IS_LOADED:
				case Resource.RESOURCE__ERRORS:
				case Resource.RESOURCE__WARNINGS: {
					Resource resource = (Resource) notification.getNotifier();
					Diagnostic diagnostic = analyzeResourceProblems(resource,
							null);
					if (diagnostic.getSeverity() != Diagnostic.OK) {
						resourceToDiagnosticMap.put(resource, diagnostic);
					} else {
						resourceToDiagnosticMap.remove(resource);
					}

					if (updateProblemIndication) {
						getSite().getShell().getDisplay()
								.asyncExec(new Runnable() {
									public void run() {
										updateProblemIndication();
									}
								});
					}
					break;
				}
				}
			} else {
				super.notifyChanged(notification);
			}
		}

		@Override
		protected void setTarget(Resource target) {
			basicSetTarget(target);
		}

		@Override
		protected void unsetTarget(Resource target) {
			basicUnsetTarget(target);
		}
	};

	/**
	 * This listens for workspace changes. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected IResourceChangeListener resourceChangeListener = new IResourceChangeListener() {
		public void resourceChanged(IResourceChangeEvent event) {
			IResourceDelta delta = event.getDelta();
			try {
				class ResourceDeltaVisitor implements IResourceDeltaVisitor {
					protected ResourceSet resourceSet = editingDomain
							.getResourceSet();
					protected Collection<Resource> changedResources = new ArrayList<Resource>();
					protected Collection<Resource> removedResources = new ArrayList<Resource>();

					public boolean visit(IResourceDelta delta) {
						if (delta.getResource().getType() == IResource.FILE) {
							if (delta.getKind() == IResourceDelta.REMOVED
									|| delta.getKind() == IResourceDelta.CHANGED
									&& delta.getFlags() != IResourceDelta.MARKERS) {
								Resource resource = resourceSet
										.getResource(URI
												.createPlatformResourceURI(
														delta.getFullPath()
																.toString(),
														true), false);
								if (resource != null) {
									if (delta.getKind() == IResourceDelta.REMOVED) {
										removedResources.add(resource);
									} else if (!savedResources.remove(resource)) {
										changedResources.add(resource);
									}
								}
							}
						}

						return true;
					}

					public Collection<Resource> getChangedResources() {
						return changedResources;
					}

					public Collection<Resource> getRemovedResources() {
						return removedResources;
					}
				}

				final ResourceDeltaVisitor visitor = new ResourceDeltaVisitor();
				delta.accept(visitor);

				if (!visitor.getRemovedResources().isEmpty()) {
					getSite().getShell().getDisplay().asyncExec(new Runnable() {
						public void run() {
							removedResources.addAll(visitor
									.getRemovedResources());
							if (!isDirty()) {
								getSite().getPage().closeEditor(
										Reqif10Editor.this, false);
							}
						}
					});
				}

				if (!visitor.getChangedResources().isEmpty()) {
					getSite().getShell().getDisplay().asyncExec(new Runnable() {
						public void run() {
							changedResources.addAll(visitor
									.getChangedResources());
							if (getSite().getPage().getActiveEditor() == Reqif10Editor.this) {
								handleActivate();
							}
						}
					});
				}
			} catch (CoreException exception) {
				Reqif10EditorPlugin.INSTANCE.log(exception);
			}
		}
	};

	/**
	 * Handles activation of the editor or it's associated views. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected void handleActivate() {
		// Recompute the read only state.
		//
		if (editingDomain.getResourceToReadOnlyMap() != null) {
			editingDomain.getResourceToReadOnlyMap().clear();

			// Refresh any actions that may become enabled or disabled.
			//
			setSelection(getSelection());
		}

		if (!removedResources.isEmpty()) {
			if (handleDirtyConflict()) {
				getSite().getPage().closeEditor(Reqif10Editor.this, false);
			} else {
				removedResources.clear();
				changedResources.clear();
				savedResources.clear();
			}
		} else if (!changedResources.isEmpty()) {
			changedResources.removeAll(savedResources);
			handleChangedResources();
			changedResources.clear();
			savedResources.clear();
		}
	}

	/**
	 * Handles what to do with changed resources on activation. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected void handleChangedResources() {
		if (!changedResources.isEmpty()
				&& (!isDirty() || handleDirtyConflict())) {
			if (isDirty()) {
				changedResources.addAll(editingDomain.getResourceSet()
						.getResources());
			}
			editingDomain.getCommandStack().flush();

			updateProblemIndication = false;
			for (Resource resource : changedResources) {
				if (resource.isLoaded()) {
					resource.unload();
					try {
						resource.load(Collections.EMPTY_MAP);
					} catch (IOException exception) {
						if (!resourceToDiagnosticMap.containsKey(resource)) {
							resourceToDiagnosticMap
									.put(resource,
											analyzeResourceProblems(resource,
													exception));
						}
					}
				}
			}

			if (AdapterFactoryEditingDomain.isStale(editorSelection)) {
				setSelection(StructuredSelection.EMPTY);
			}

			updateProblemIndication = true;
			updateProblemIndication();
		}
	}

	/**
	 * Updates the problems indication with the information described in the
	 * specified diagnostic. <!-- begin-user-doc --> Provides a better error
	 * text. <!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	protected void updateProblemIndication() {
		if (updateProblemIndication) {
			BasicDiagnostic diagnostic = new BasicDiagnostic(Diagnostic.OK,
					"org.eclipse.rmf.reqif10.pror.editor", 0, null,
					new Object[] { editingDomain.getResourceSet() });
			for (Diagnostic childDiagnostic : resourceToDiagnosticMap.values()) {
				if (childDiagnostic.getSeverity() != Diagnostic.OK) {
					diagnostic.add(childDiagnostic);
				}
			}

			int lastEditorPage = getPageCount() - 1;
			if (lastEditorPage >= 0
					&& getEditor(lastEditorPage) instanceof ProblemEditorPart) {
				((ProblemEditorPart) getEditor(lastEditorPage))
						.setDiagnostic(diagnostic);
				if (diagnostic.getSeverity() != Diagnostic.OK) {
					setActivePage(lastEditorPage);
				}
			} else if (diagnostic.getSeverity() != Diagnostic.OK) {
				ProblemEditorPart problemEditorPart = new ProblemEditorPart();
				problemEditorPart
						.setTextProvider(new ProblemEditorPart.TextProvider() {
							@Override
							public String getMessage(Diagnostic rootDiagnostic) {
								return rootDiagnostic.getSeverity() == Diagnostic.OK ? getString("_UI_NoProblems_message")
										: rootDiagnostic.getMessage() != null ? rootDiagnostic
												.getMessage()
												: getString("_UI_DefaultProblem_message");
							}
						});

				problemEditorPart.setDiagnostic(diagnostic);
				problemEditorPart.setMarkerHelper(markerHelper);
				try {
					addPage(++lastEditorPage, problemEditorPart,
							getEditorInput());
					setPageText(lastEditorPage, problemEditorPart.getPartName());
					setActivePage(lastEditorPage);
					showTabs();
				} catch (PartInitException exception) {
					Reqif10EditorPlugin.INSTANCE.log(exception);
				}
			}

			if (markerHelper.hasMarkers(editingDomain.getResourceSet())) {
				markerHelper.deleteMarkers(editingDomain.getResourceSet());
				if (diagnostic.getSeverity() != Diagnostic.OK) {
					try {
						markerHelper.createMarkers(diagnostic);
					} catch (CoreException exception) {
						Reqif10EditorPlugin.INSTANCE.log(exception);
					}
				}
			}
		}
	}

	/**
	 * Shows a dialog that asks if conflicting changes should be discarded. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected boolean handleDirtyConflict() {
		return MessageDialog.openQuestion(getSite().getShell(),
				getString("_UI_FileConflict_label"),
				getString("_WARN_FileConflict"));
	}

	/**
	 * This creates a model editor. <!-- begin-user-doc --> <!-- end-user-doc
	 * -->
	 * 
	 * @generated
	 */
	public Reqif10Editor() {
		super();
		initializeEditingDomain();
	}

	/**
	 * This sets up the editing domain for the model editor. <!-- begin-user-doc
	 * --> <!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	protected void initializeEditingDomain() {
		// Create an adapter factory that yields item providers.
		//

		adapterFactory = new ComposedAdapterFactory(
				ComposedAdapterFactory.Descriptor.Registry.INSTANCE);

		adapterFactory
				.addAdapterFactory(new ResourceItemProviderAdapterFactory());
		adapterFactory
				.addAdapterFactory(new ReqIF10ItemProviderAdapterFactory());
		adapterFactory.addAdapterFactory(new XhtmlItemProviderAdapterFactory());
		adapterFactory
				.addAdapterFactory(new ConfigurationItemProviderAdapterFactory());
		adapterFactory
				.addAdapterFactory(new ReflectiveItemProviderAdapterFactory());

		// Create the command stack that will notify this editor as commands are
		// executed.
		//
		// FIXME (mj) this got diabled for now, due to Bug 381494
		// TimestampedCommandStack commandStack = new TimestampedCommandStack();
		BasicCommandStack commandStack = new BasicCommandStack();

		// Add a listener to set the most recent command's affected objects to
		// be the selection of the viewer with focus.
		//
		commandStack.addCommandStackListener(new CommandStackListener() {
			public void commandStackChanged(final EventObject event) {
				// LL: I changed this so that the current display is used. The
				// old way uses the display of the editors container. However,
				// if the widget is disposed, we get an exception. This is the
				// case if this code snippet is triggered if the editor has no
				// focus.
				Display.getCurrent().asyncExec(new Runnable() {
					public void run() {
						firePropertyChange(IEditorPart.PROP_DIRTY);
						// Try to select the affected objects.
						//
						Command mostRecentCommand = ((CommandStack) event
								.getSource()).getMostRecentCommand();
						if (mostRecentCommand != null) {
							setSelectionToViewer(mostRecentCommand
									.getAffectedObjects());
						}
					}
				});
			}
		});

		// Create the editing domain with a special command stack.
		//
		editingDomain = new AdapterFactoryEditingDomain(adapterFactory,
				commandStack, new XMLPersistenceMappingResourceSetImpl());
		editingDomain
				.getResourceSet()
				.eAdapters()
				.add(new AdapterFactoryEditingDomain.EditingDomainProvider(
						editingDomain));
		// FIXME (mj) this got diabled for now, due to Bug 381494
		// System.out.println("XXX");
		// commandStack.setEditingDomain(editingDomain);
	}

	/**
	 * This is here for the listener to be able to call it. <!-- begin-user-doc
	 * --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	protected void firePropertyChange(int action) {
		super.firePropertyChange(action);
	}

	/**
	 * This sets the selection into whichever viewer is active. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void setSelectionToViewer(Collection<?> collection) {
		final Collection<?> theSelection = collection;
		// Make sure it's okay.
		//
		if (theSelection != null && !theSelection.isEmpty()) {
			Runnable runnable = new Runnable() {
				public void run() {
					// Try to select the items in the current content viewer of
					// the editor.
					//
					if (currentViewer != null) {
						currentViewer.setSelection(new StructuredSelection(
								theSelection.toArray()), true);
					}
				}
			};
			getSite().getShell().getDisplay().asyncExec(runnable);
		}
	}

	/**
	 * This returns the editing domain as required by the
	 * {@link IEditingDomainProvider} interface. This is important for
	 * implementing the static methods of {@link AdapterFactoryEditingDomain}
	 * and for supporting {@link org.eclipse.emf.edit.ui.action.CommandAction}.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public EditingDomain getEditingDomain() {
		return editingDomain;
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public class ReverseAdapterFactoryContentProvider extends
			AdapterFactoryContentProvider {
		/**
		 * <!-- begin-user-doc --> <!-- end-user-doc -->
		 * 
		 * @generated
		 */
		public ReverseAdapterFactoryContentProvider(
				AdapterFactory adapterFactory) {
			super(adapterFactory);
		}

		/**
		 * <!-- begin-user-doc --> <!-- end-user-doc -->
		 * 
		 * @generated
		 */
		@Override
		public Object[] getElements(Object object) {
			Object parent = super.getParent(object);
			return (parent == null ? Collections.EMPTY_SET : Collections
					.singleton(parent)).toArray();
		}

		/**
		 * <!-- begin-user-doc --> <!-- end-user-doc -->
		 * 
		 * @generated
		 */
		@Override
		public Object[] getChildren(Object object) {
			Object parent = super.getParent(object);
			return (parent == null ? Collections.EMPTY_SET : Collections
					.singleton(parent)).toArray();
		}

		/**
		 * <!-- begin-user-doc --> <!-- end-user-doc -->
		 * 
		 * @generated
		 */
		@Override
		public boolean hasChildren(Object object) {
			Object parent = super.getParent(object);
			return parent != null;
		}

		/**
		 * <!-- begin-user-doc --> <!-- end-user-doc -->
		 * 
		 * @generated
		 */
		@Override
		public Object getParent(Object object) {
			return null;
		}
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void setCurrentViewerPane(ViewerPane viewerPane) {
		if (currentViewerPane != viewerPane) {
			if (currentViewerPane != null) {
				currentViewerPane.showFocus(false);
			}
			currentViewerPane = viewerPane;
		}
		setCurrentViewer(currentViewerPane.getViewer());
	}

	/**
	 * This makes sure that one content viewer, either for the current page or
	 * the outline view, if it has focus, is the current one. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void setCurrentViewer(Viewer viewer) {
		// If it is changing...
		//
		if (currentViewer != viewer) {
			if (selectionChangedListener == null) {
				// Create the listener on demand.
				//
				selectionChangedListener = new ISelectionChangedListener() {
					// This just notifies those things that are affected by the
					// section.
					//
					public void selectionChanged(
							SelectionChangedEvent selectionChangedEvent) {
						setSelection(selectionChangedEvent.getSelection());
					}
				};
			}

			// Stop listening to the old one.
			//
			if (currentViewer != null) {
				currentViewer
						.removeSelectionChangedListener(selectionChangedListener);
			}

			// Start listening to the new one.
			//
			if (viewer != null) {
				viewer.addSelectionChangedListener(selectionChangedListener);
			}

			// Remember it.
			//
			currentViewer = viewer;

			// Set the editors selection based on the current viewer's
			// selection.
			//
			setSelection(currentViewer == null ? StructuredSelection.EMPTY
					: currentViewer.getSelection());
		}
	}

	/**
	 * This returns the viewer as required by the {@link IViewerProvider}
	 * interface. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public Viewer getViewer() {
		return currentViewer;
	}

	/**
	 * This creates a context menu for the viewer and adds a listener as well
	 * registering the menu for extension. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	protected void createContextMenuFor(StructuredViewer viewer) {
		MenuManager contextMenu = new MenuManager("#PopUp");
		contextMenu.add(new Separator("additions"));
		contextMenu.setRemoveAllWhenShown(true);
		contextMenu.addMenuListener(this);
		Menu menu = contextMenu.createContextMenu(viewer.getControl());
		viewer.getControl().setMenu(menu);
		getSite().registerContextMenu(contextMenu,
				new UnwrappingSelectionProvider(viewer));

		int dndOperations = DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK;
		Transfer[] transfers = new Transfer[] { LocalTransfer.getInstance() };
		viewer.addDragSupport(dndOperations, transfers, new ViewerDragAdapter(
				viewer));
		viewer.addDropSupport(dndOperations, transfers,
				new EditingDomainViewerDropAdapter(editingDomain, viewer));
	}

	/**
	 * This is the method called to load a resource into the editing domain's
	 * resource set based on the editor's input. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	public void createModel() {
		URI resourceURI = EditUIUtil.getURI(getEditorInput());
		Exception exception = null;
		Resource resource = null;
		try {
			// Load the resource through the editing domain.
			//
			resource = editingDomain.getResourceSet().getResource(resourceURI,
					true);
		} catch (Exception e) {
			exception = e;
			resource = editingDomain.getResourceSet().getResource(resourceURI,
					false);
		}

		Diagnostic diagnostic = analyzeResourceProblems(resource, exception);
		if (diagnostic.getSeverity() != Diagnostic.OK) {
			resourceToDiagnosticMap.put(resource,
					analyzeResourceProblems(resource, exception));
		}
		editingDomain.getResourceSet().eAdapters()
				.add(problemIndicationAdapter);
	}

	/**
	 * Returns a diagnostic describing the errors and warnings listed in the
	 * resource and the specified exception (if any). <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public Diagnostic analyzeResourceProblems(Resource resource,
			Exception exception) {
		if (!resource.getErrors().isEmpty()
				|| !resource.getWarnings().isEmpty()) {
			BasicDiagnostic basicDiagnostic = new BasicDiagnostic(
					Diagnostic.ERROR,
					"org.eclipse.rmf.reqif10.pror.editor",
					0,
					getString("_UI_CreateModelError_message", resource.getURI()),
					new Object[] { exception == null ? (Object) resource
							: exception });
			basicDiagnostic.merge(EcoreUtil.computeDiagnostic(resource, true));
			return basicDiagnostic;
		} else if (exception != null) {
			return new BasicDiagnostic(Diagnostic.ERROR,
					"org.eclipse.rmf.reqif10.pror.editor", 0, getString(
							"_UI_CreateModelError_message", resource.getURI()),
					new Object[] { exception });
		} else {
			return Diagnostic.OK_INSTANCE;
		}
	}

	/**
	 * This is the method used by the framework to install your own controls.
	 * <!-- begin-user-doc --> We build one page only. The Editor may add a page
	 * with error messages.<!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	@Override
	public void createPages() {
		ProgressMonitorDialog monitorDialog = new ProgressMonitorDialog(
				getSite().getShell());
		try {
			monitorDialog.run(false, false, new IRunnableWithProgress() {
				public void run(IProgressMonitor monitor)
						throws InvocationTargetException, InterruptedException {
					editingDomain
							.getResourceSet()
							.getLoadOptions()
							.put(XMLPersistenceMappingResource.OPTION_PROGRESS_MONITOR,
									monitor);
					createModel();
					monitor.done();
				}
			});
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}

		reqif = openReqif();

		// Only creates the other pages if there is something that can be
		// edited
		if (!getEditingDomain().getResourceSet().getResources().isEmpty()) {
			ReqifMainForm form = new ReqifMainForm(getContainer(), this);
			addPage(form.getForm());
		}

		// Ensures that this editor will only display the page's tab
		// area if there are more than one page
		getContainer().addControlListener(new ControlAdapter() {
			boolean guard = false;

			@Override
			public void controlResized(ControlEvent event) {
				if (!guard) {
					guard = true;
					hideTabs();
					guard = false;
				}
			}
		});

		getSite().getShell().getDisplay().asyncExec(new Runnable() {
			public void run() {
				updateProblemIndication();
				// if the model has exactly one Specification, then open it.
				if (reqif.getCoreContent().getSpecifications().size() == 1) {
					openSpecEditor(reqif.getCoreContent().getSpecifications().get(0));
				}
			}
		});
		

	}

	/**
	 * Opens the RIF from the Editing Domain and notifies the Presentations.
	 * 
	 * @return {@link RIF}
	 */

	private ReqIF openReqif() {
		if (editingDomain.getResourceSet().getResources().isEmpty()) {
			throw new IllegalArgumentException("ResourceSet is empty.");
		}
		Resource resource = editingDomain.getResourceSet().getResources()
				.get(0);

		if (resource.getContents().isEmpty()) {
			throw new IllegalArgumentException(
					"No ReqIf Content found.  Please check errors on the console.");
		}

		reqif = (ReqIF) resource.getContents().get(0);

		// Handle isSimplified = true values
		boolean askedToRestore = false;
		boolean restoreSimplifiedValues = false;
		EList<SpecObject> specObjects = reqif.getCoreContent().getSpecObjects();
		for (SpecObject specObject : specObjects) {
			EList<AttributeValue> values = specObject.getValues();
			for (AttributeValue atrVal : values) {
				if (atrVal instanceof AttributeValueXHTML) {
					AttributeValueXHTML atrXhtml = (AttributeValueXHTML) atrVal;
					if (atrXhtml.isSimplified()) {

						if (!askedToRestore) {
							restoreSimplifiedValues = MessageDialog
									.openQuestion(
											Display.getDefault()
													.getActiveShell(),
											"Please choose",
											Reqif10EditorPlugin.INSTANCE
													.getString("_UI_Reqif10XhtmlRestoreIsSimplified"));
							askedToRestore = true;
						}

						if (restoreSimplifiedValues) {
							// Restore value
							XhtmlContent theOriginalValue = atrXhtml
									.getTheOriginalValue();
							atrXhtml.setTheValue(theOriginalValue);
							atrXhtml.setTheOriginalValue(null);
							atrXhtml.setSimplified(false);
						}

					}
				}
			}
		}

		// TODO there must be a better place?
		PresentationServiceManager.notifiyOpenReqif(reqif, getAdapterFactory(),
				getEditingDomain());
		ConfigurationUtil.setDefaultLabelsIfNecessary(adapterFactory,
				editingDomain, reqif);
		
		return reqif;
	}

	public ReqIF getReqif() {
		return reqif;
	}

	/**
	 * If there is just one page in the multi-page editor part, this hides the
	 * single tab at the bottom. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected void hideTabs() {
		if (getPageCount() <= 1) {
			setPageText(0, "");
			if (getContainer() instanceof CTabFolder) {
				((CTabFolder) getContainer()).setTabHeight(1);
				Point point = getContainer().getSize();
				getContainer().setSize(point.x, point.y + 6);
			}
		}
	}

	/**
	 * If there is more than one page in the multi-page editor part, this shows
	 * the tabs at the bottom. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected void showTabs() {
		if (getPageCount() > 1) {
			setPageText(0, getString("_UI_SelectionPage_label"));
			if (getContainer() instanceof CTabFolder) {
				((CTabFolder) getContainer()).setTabHeight(SWT.DEFAULT);
				Point point = getContainer().getSize();
				getContainer().setSize(point.x, point.y - 6);
			}
		}
	}

	/**
	 * This is used to track the active viewer. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	protected void pageChange(int pageIndex) {
		super.pageChange(pageIndex);

		if (contentOutlinePage != null) {
			handleContentOutlineSelection(contentOutlinePage.getSelection());
		}
	}

	/**
	 * This is how the framework determines which interfaces we implement. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	@SuppressWarnings("rawtypes")
	@Override
	public Object getAdapter(Class key) {
		if (key.equals(IContentOutlinePage.class)) {
			return showOutlineView() ? getContentOutlinePage() : null;
		} else if (key.equals(IPropertySheetPage.class)) {
			return getPropertySheetPage();
		} else if (key.equals(IGotoMarker.class)) {
			return this;
		} else {
			return super.getAdapter(key);
		}
	}

	/**
	 * This accesses a cached version of the content outliner. <!--
	 * begin-user-doc --> We use {@link ReqIfContent} as the input for the
	 * Outline and we add Filters to it. <!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	public IContentOutlinePage getContentOutlinePage() {
		if (contentOutlinePage == null) {
			// The content outline is just a tree.
			//
			class MyContentOutlinePage extends ContentOutlinePage {
				@Override
				public void createControl(Composite parent) {
					super.createControl(parent);
					contentOutlineViewer = getTreeViewer();
					contentOutlineViewer.addSelectionChangedListener(this);

					// Set up the tree viewer.
					//
					contentOutlineViewer
							.setContentProvider(new AdapterFactoryContentProvider(
									adapterFactory));
					contentOutlineViewer
							.setLabelProvider(new AdapterFactoryLabelProvider(
									adapterFactory));

					// Use the ReqifContent as the input
					boolean inputSet = false;
					if (!DEBUG
							&& editingDomain.getResourceSet().getResources()
									.size() == 1) {
						Resource newInput = editingDomain.getResourceSet()
								.getResources().get(0);
						if (newInput.getAllContents().hasNext()) {
							ReqIF reqif = (ReqIF) newInput.getAllContents()
									.next();
							ReqIFContent content = reqif.getCoreContent();
							if (content == null) {
								content = ReqIF10Factory.eINSTANCE
										.createReqIFContent();
								getEditingDomain()
										.getCommandStack()
										.execute(
												SetCommand
														.create(getEditingDomain(),
																reqif,
																ReqIF10Package.Literals.REQ_IF__CORE_CONTENT,
																content));
							}
							contentOutlineViewer.setInput(content);

							// Add filters
							ViewerFilter[] filters = { new ViewerFilter() {
								@Override
								public boolean select(Viewer viewer,
										Object parentElement, Object element) {
									return !(element instanceof VirtualDatatypeDefinitionItemProvider || element instanceof VirtualSpecTypeItemProvider);
								}
							} };
							contentOutlineViewer.setFilters(filters);

							inputSet = true;
						}
					}
					if (!inputSet)
						contentOutlineViewer.setInput(editingDomain
								.getResourceSet());

					// Make sure our popups work.
					//
					createContextMenuFor(contentOutlineViewer);

					if (!editingDomain.getResourceSet().getResources()
							.isEmpty()) {
						// Select the root object in the view.
						//
						contentOutlineViewer
								.setSelection(new StructuredSelection(
										editingDomain.getResourceSet()
												.getResources().get(0)), true);
					}

					// React to double clicking
					contentOutlineViewer
							.addDoubleClickListener(new IDoubleClickListener() {
								public void doubleClick(DoubleClickEvent event) {
									if (event.getSelection() instanceof IStructuredSelection
											&& !event.getSelection().isEmpty()) {
										Object obj = ((IStructuredSelection) event
												.getSelection())
												.getFirstElement();
										if (obj instanceof Specification) {
											openSpecEditor((Specification)obj);
										}

									}
								}

							});
				}

				@Override
				public void makeContributions(IMenuManager menuManager,
						IToolBarManager toolBarManager,
						IStatusLineManager statusLineManager) {
					super.makeContributions(menuManager, toolBarManager,
							statusLineManager);
					contentOutlineStatusLineManager = statusLineManager;
				}

				@Override
				public void setActionBars(IActionBars actionBars) {
					super.setActionBars(actionBars);
					getActionBarContributor().shareGlobalActions(this,
							actionBars);
				}
			}

			contentOutlinePage = new MyContentOutlinePage();

			// Listen to selection so that we can handle it is a special way.
			//
			contentOutlinePage
					.addSelectionChangedListener(new ISelectionChangedListener() {
						// This ensures that we handle selections correctly.
						//
						public void selectionChanged(SelectionChangedEvent event) {
							handleContentOutlineSelection(event.getSelection());
						}
					});
		}
		return contentOutlinePage;
	}

	/**
	 * This accesses a cached version of the property sheet. <!-- begin-user-doc
	 * --> Changed return type from {@link IPropertySheetPage} to
	 * {@link PropertySheetPage}, so that we can trigger a refresh from the
	 * {@link SpecificationEditor}.
	 * <p>
	 * 
	 * We also build a ProrPropertySheetPage instead of a normal one. <!--
	 * end-user-doc -->
	 * 
	 * @generated NOT
	 */
	public ProrPropertySheetPage getPropertySheetPage() {
		if (propertySheetPage == null) {
			propertySheetPage = new ProrPropertySheetPage(getEditingDomain(),
					adapterFactory);
		}

		return propertySheetPage;
	}

	/**
	 * This deals with how we want selection in the outliner to affect the other
	 * views. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void handleContentOutlineSelection(ISelection selection) {
		if (currentViewerPane != null && !selection.isEmpty()
				&& selection instanceof IStructuredSelection) {
			Iterator<?> selectedElements = ((IStructuredSelection) selection)
					.iterator();
			if (selectedElements.hasNext()) {
				// Get the first selected element.
				//
				Object selectedElement = selectedElements.next();

				// If it's the selection viewer, then we want it to select the
				// same selection as this selection.
				//
				if (currentViewerPane.getViewer() == selectionViewer) {
					ArrayList<Object> selectionList = new ArrayList<Object>();
					selectionList.add(selectedElement);
					while (selectedElements.hasNext()) {
						selectionList.add(selectedElements.next());
					}

					// Set the selection to the widget.
					//
					selectionViewer.setSelection(new StructuredSelection(
							selectionList));
				} else {
					// Set the input to the widget.
					//
					if (currentViewerPane.getViewer().getInput() != selectedElement) {
						currentViewerPane.getViewer().setInput(selectedElement);
						currentViewerPane.setTitle(selectedElement);
					}
				}
			}
		}
	}

	/**
	 * This is for implementing {@link IEditorPart} and simply tests the command
	 * stack. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	public boolean isDirty() {
		return ((BasicCommandStack) editingDomain.getCommandStack())
				.isSaveNeeded();
	}

	/**
	 * This is for implementing {@link IEditorPart} and simply saves the model
	 * file. <!-- begin-user-doc --> Upon each save, the ReqIF ID is updated.
	 * <!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	@Override
	public void doSave(IProgressMonitor progressMonitor) {
		ISelection currentSelection = getSite().getSelectionProvider().getSelection();
		// Update ReqIF ID.
		reqif.getTheHeader().setIdentifier("rmf-" + UUID.randomUUID().toString());

		// Save only resources that have actually changed.
		//
		final Map<Object, Object> saveOptions = new HashMap<Object, Object>();
		saveOptions.put(Resource.OPTION_SAVE_ONLY_IF_CHANGED,
				Resource.OPTION_SAVE_ONLY_IF_CHANGED_MEMORY_BUFFER);

		// Do the work within an operation because this is a long running
		// activity that modifies the workbench.
		//
		WorkspaceModifyOperation operation = new WorkspaceModifyOperation() {
			// This is the method that gets invoked when the operation runs.
			//
			@Override
			public void execute(IProgressMonitor monitor) {
				// Save the resources to the file system.
				//
				boolean first = true;
				for (Resource resource : editingDomain.getResourceSet()
						.getResources()) {
					if ((first || !resource.getContents().isEmpty() || isPersisted(resource))
							&& !editingDomain.isReadOnly(resource)) {
						try {
							long timeStamp = resource.getTimeStamp();
							resource.save(saveOptions);
							if (resource.getTimeStamp() != timeStamp) {
								savedResources.add(resource);
							}
						} catch (Exception exception) {
							resourceToDiagnosticMap
									.put(resource,
											analyzeResourceProblems(resource,
													exception));
						}
						first = false;
					}
				}
			}
		};

		updateProblemIndication = false;
		try {
			// This runs the options, and shows progress.
			//
			new ProgressMonitorDialog(getSite().getShell()).run(true, false,
					operation);

			// Refresh the necessary state.
			//
			((BasicCommandStack) editingDomain.getCommandStack()).saveIsDone();
			firePropertyChange(IEditorPart.PROP_DIRTY);
		} catch (Exception exception) {
			// Something went wrong that shouldn't.
			//
			Reqif10EditorPlugin.INSTANCE.log(exception);
		}
		updateProblemIndication = true;
		updateProblemIndication();
		
		getSite().getSelectionProvider().setSelection(currentSelection);
	}

	/**
	 * This returns whether something has been persisted to the URI of the
	 * specified resource. The implementation uses the URI converter from the
	 * editor's resource set to try to open an input stream. <!-- begin-user-doc
	 * --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected boolean isPersisted(Resource resource) {
		boolean result = false;
		try {
			InputStream stream = editingDomain.getResourceSet()
					.getURIConverter().createInputStream(resource.getURI());
			if (stream != null) {
				result = true;
				stream.close();
			}
		} catch (IOException e) {
			// Ignore
		}
		return result;
	}

	/**
	 * This always returns true because it is not currently supported. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	public boolean isSaveAsAllowed() {
		return true;
	}

	/**
	 * This also changes the editor's input. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	public void doSaveAs() {
		SaveAsDialog saveAsDialog = new SaveAsDialog(getSite().getShell());
		saveAsDialog.open();
		IPath path = saveAsDialog.getResult();
		if (path != null) {
			IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
			if (file != null) {
				doSaveAs(URI.createPlatformResourceURI(file.getFullPath()
						.toString(), true), new FileEditorInput(file));
			}
		}
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected void doSaveAs(URI uri, IEditorInput editorInput) {
		(editingDomain.getResourceSet().getResources().get(0)).setURI(uri);
		setInputWithNotify(editorInput);
		setPartName(editorInput.getName());
		IProgressMonitor progressMonitor = getActionBars()
				.getStatusLineManager() != null ? getActionBars()
				.getStatusLineManager().getProgressMonitor()
				: new NullProgressMonitor();
		doSave(progressMonitor);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void gotoMarker(IMarker marker) {
		try {
			if (marker.getType().equals(EValidator.MARKER)) {
				String uriAttribute = marker.getAttribute(
						EValidator.URI_ATTRIBUTE, null);
				if (uriAttribute != null) {
					URI uri = URI.createURI(uriAttribute);
					EObject eObject = editingDomain.getResourceSet()
							.getEObject(uri, true);
					if (eObject != null) {
						setSelectionToViewer(Collections
								.singleton(editingDomain.getWrapper(eObject)));
					}
				}
			}
		} catch (CoreException exception) {
			Reqif10EditorPlugin.INSTANCE.log(exception);
		}
	}

	/**
	 * This is called during startup. <!-- begin-user-doc --> <!-- end-user-doc
	 * -->
	 * 
	 * @generated
	 */
	@Override
	public void init(IEditorSite site, IEditorInput editorInput) {
		setSite(site);
		setInputWithNotify(editorInput);
		setPartName(editorInput.getName());
		site.setSelectionProvider(this);
		site.getPage().addPartListener(partListener);
		ResourcesPlugin.getWorkspace().addResourceChangeListener(
				resourceChangeListener, IResourceChangeEvent.POST_CHANGE);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	public void setFocus() {
		if (currentViewerPane != null) {
			currentViewerPane.setFocus();
		} else {
			getControl(getActivePage()).setFocus();
		}
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider}.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void addSelectionChangedListener(ISelectionChangedListener listener) {
		selectionChangedListeners.add(listener);
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider}.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void removeSelectionChangedListener(
			ISelectionChangedListener listener) {
		selectionChangedListeners.remove(listener);
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider} to
	 * return this editor's overall selection. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @generated
	 */
	public ISelection getSelection() {
		return editorSelection;
	}

	/**
	 * This implements {@link org.eclipse.jface.viewers.ISelectionProvider} to
	 * set this editor's overall selection. Calling this result will notify the
	 * listeners. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void setSelection(ISelection selection) {
		editorSelection = selection;

		for (ISelectionChangedListener listener : selectionChangedListeners) {
			listener.selectionChanged(new SelectionChangedEvent(this, selection));
		}
		setStatusLineManager(selection);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void setStatusLineManager(ISelection selection) {
		IStatusLineManager statusLineManager = currentViewer != null
				&& currentViewer == contentOutlineViewer ? contentOutlineStatusLineManager
				: getActionBars().getStatusLineManager();

		if (statusLineManager != null) {
			if (selection instanceof IStructuredSelection) {
				Collection<?> collection = ((IStructuredSelection) selection)
						.toList();
				switch (collection.size()) {
				case 0: {
					statusLineManager
							.setMessage(getString("_UI_NoObjectSelected"));
					break;
				}
				case 1: {
					String text = new AdapterFactoryItemDelegator(
							adapterFactory).getText(collection.iterator()
							.next());
					statusLineManager.setMessage(getString(
							"_UI_SingleObjectSelected", text));
					break;
				}
				default: {
					statusLineManager.setMessage(getString(
							"_UI_MultiObjectSelected",
							Integer.toString(collection.size())));
					break;
				}
				}
			} else {
				statusLineManager.setMessage("");
			}
		}
	}

	/**
	 * This looks up a string in the plugin's plugin.properties file. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	private static String getString(String key) {
		return Reqif10EditorPlugin.INSTANCE.getString(key);
	}

	/**
	 * This looks up a string in plugin.properties, making a substitution. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	private static String getString(String key, Object s1) {
		return Reqif10EditorPlugin.INSTANCE.getString(key, new Object[] { s1 });
	}

	/**
	 * This implements {@link org.eclipse.jface.action.IMenuListener} to help
	 * fill the context menus with contributions from the Edit menu. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public void menuAboutToShow(IMenuManager menuManager) {
		((IMenuListener) getEditorSite().getActionBarContributor())
				.menuAboutToShow(menuManager);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public EditingDomainActionBarContributor getActionBarContributor() {
		return (EditingDomainActionBarContributor) getEditorSite()
				.getActionBarContributor();
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public IActionBars getActionBars() {
		return getActionBarContributor().getActionBars();
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	public AdapterFactory getAdapterFactory() {
		return adapterFactory;
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	@Override
	public void dispose() {

		updateProblemIndication = false;

		ResourcesPlugin.getWorkspace().removeResourceChangeListener(
				resourceChangeListener);

		getSite().getPage().removePartListener(partListener);

		adapterFactory.dispose();

		if (getActionBarContributor().getActiveEditor() == this) {
			getActionBarContributor().setActiveEditor(null);
		}

		if (propertySheetPage != null) {
			propertySheetPage.dispose();
		}

		if (contentOutlinePage != null) {
			contentOutlinePage.dispose();
		}

		// TODO there must be a better place?
		PresentationServiceManager.notifiyCloseReqif(reqif,
				getAdapterFactory(), getEditingDomain());

		super.dispose();

	}

	/**
	 * Returns whether the outline view should be presented to the user. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected boolean showOutlineView() {
		return true;
	}

	/**
	 * Finds all open {@link OLDSpecificationEditor} that are associated with
	 * this Editor and closes them.
	 */
	private void closeAssociatedSpecEditors(final IEditorSite site) {
		IEditorReference[] editors = site.getPage().getEditorReferences();
		for (IEditorReference editor : editors) {

			try {
				if (editor.getEditorInput() instanceof ReqifSpecificationEditorInput) {
					ReqifSpecificationEditorInput i = (ReqifSpecificationEditorInput) editor
							.getEditorInput();
					if (i.getReqifEditor().equals(Reqif10Editor.this)) {
						editor.getPage().closeEditor(editor.getEditor(false),
								false);
					}
				}
			} catch (PartInitException e) {
				e.printStackTrace();
			}
		}
	}

	public ISpecificationEditor openSpecEditor(Specification spec) {
		ReqifSpecificationEditorInput editorInput = new ReqifSpecificationEditorInput(
				this, spec);
		try {
			return (ISpecificationEditor) IDE.openEditor(getSite().getPage(),
					editorInput, SpecificationEditor.EDITOR_ID, true);
		} catch (PartInitException e) {
			throw new RuntimeException(e);
		}
	}
}