org.wso2.developerstudio.eclipse.ds.presentation.DsEditor.java Source code

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/*
 * Copyright 2009-2010 WSO2, Inc. (http://wso2.com)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.wso2.developerstudio.eclipse.ds.presentation;

import java.io.IOException;
import java.io.InputStream;
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.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
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.emf.edit.ui.view.ExtendedPropertySheetPage;
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.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
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.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
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.IEditorSite;
import org.eclipse.ui.IPartListener;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.WorkspaceModifyOperation;
import org.eclipse.ui.dialogs.SaveAsDialog;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.ide.IGotoMarker;
import org.eclipse.ui.part.FileEditorInput;
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.IPropertySheetEntry;
import org.eclipse.ui.views.properties.IPropertySheetPage;
import org.eclipse.ui.views.properties.PropertySheet;
import org.eclipse.ui.views.properties.PropertySheetPage;
import org.eclipse.ui.views.properties.PropertySheetSorter;
import org.wso2.developerstudio.eclipse.ds.DataService;
import org.wso2.developerstudio.eclipse.ds.DocumentRoot;
import org.wso2.developerstudio.eclipse.ds.DsPackage;
import org.wso2.developerstudio.eclipse.ds.command.DesignViewActionHandler;
import org.wso2.developerstudio.eclipse.ds.impl.DocumentRootImpl;
import org.wso2.developerstudio.eclipse.ds.presentation.custom.CustomAdapterFactoryContentProvider;
import org.wso2.developerstudio.eclipse.ds.presentation.data.DataSourcePage;
import org.wso2.developerstudio.eclipse.ds.presentation.md.DetailSectionUiUtil;
import org.wso2.developerstudio.eclipse.ds.presentation.md.MasterDetailsPage;
import org.wso2.developerstudio.eclipse.ds.presentation.source.DsObjectSourceEditor;
import org.wso2.developerstudio.eclipse.ds.provider.DsItemProviderAdapterFactory;

// TODO: Auto-generated Javadoc
/**
 * This is an example of a Ds model editor.
 * <!-- begin-user-doc --> <!--
 * end-user-doc -->
 * 
 * @generated NOT
 */
public class DsEditor extends FormEditor
        implements IEditingDomainProvider, ISelectionProvider, IMenuListener, IViewerProvider, IGotoMarker {

    private DsEditor dsEditor;

    private DesignViewActionHandler designViewActionHandler;

    private DataService dataService;
    /**
     * 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 MasterDetail page
     * 
     */
    private MasterDetailsPage mdPage;

    /**
     * This is Data Source detail page
     * 
     */
    private DataSourcePage dataSourcePage;
    /**
     * This is SourceViwer
     * 
     */
    private DsObjectSourceEditor sourceEditor;

    /**
     * Design view index
     * 
     */
    private static final int DESIGN_VIEW_INDEX = 0;

    /**
     * Data Source Page index
     * 
     */
    private static final int DATA_SOURCE_PAGE_INDEX = 2;
    /**
     * Source view index
     * 
     */
    private static final int SOURCE_VIEW_INDEX = 1;

    /**
     * Resource holder for the Dseditor
     * 
     */
    private Resource domainResource;

    /**
     * Keep track the changes in Source view.
     * 
     */
    private boolean isSourceModified;

    /**
     * Keep track the state of design view.
     * 
     */
    private boolean designViewActivated;

    private boolean isSavingProcOk;
    /**
     * This is the property sheet page.
     * <!-- begin-user-doc --> <!--
     * end-user-doc -->
     * 
     * @generated
     */
    protected PropertySheetPage 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 -->
     * <!-- end-user-doc -->. @generated
     */
    protected IPartListener partListener = new IPartListener() {
        public void partActivated(IWorkbenchPart p) {
            if (p instanceof ContentOutline) {
                if (((ContentOutline) p).getCurrentPage() == contentOutlinePage) {
                    getActionBarContributor().setActiveEditor(DsEditor.this);

                    setCurrentViewer(contentOutlineViewer);
                }
            } else if (p instanceof PropertySheet) {
                if (((PropertySheet) p).getCurrentPage() == propertySheetPage) {
                    getActionBarContributor().setActiveEditor(DsEditor.this);
                    handleActivate();
                }
            } else if (p == DsEditor.this) {
                handleActivate();
            }
        }

        public void partBroughtToTop(IWorkbenchPart p) {
            // Ignore.
        }

        public void partClosed(IWorkbenchPart p) {
            // Ignore.
        }

        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;

    /**
     * Adapter used to update the problem indication when resources are demanded
     * loaded.
     * <!-- begin-user-doc --> <!-- end-user-doc -->
     * 
     * @generated
     */
    protected EContentAdapter problemIndicationAdapter = new EContentAdapter() {

        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);
            }
        }

        protected void setTarget(Resource target) {
            basicSetTarget(target);
        }

        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(DsEditor.this, false);
                            }
                        }
                    });
                }

                if (!visitor.getChangedResources().isEmpty()) {
                    getSite().getShell().getDisplay().asyncExec(new Runnable() {
                        public void run() {
                            changedResources.addAll(visitor.getChangedResources());
                            if (getSite().getPage().getActiveEditor() == DsEditor.this) {
                                handleActivate();
                            }
                        }
                    });
                }
            } catch (CoreException exception) {
                DsEditorPlugin.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(DsEditor.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 --> <!-- end-user-doc -->
     * 
     * @generated
     */
    protected void updateProblemIndication() {
        if (updateProblemIndication) {
            BasicDiagnostic diagnostic = new BasicDiagnostic(Diagnostic.OK,
                    "org.wso2.developerstudio.eclipse.ds.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.setDiagnostic(diagnostic);
                problemEditorPart.setMarkerHelper(markerHelper);
                try {
                    addPage(++lastEditorPage, problemEditorPart, getEditorInput());
                    setPageText(lastEditorPage, problemEditorPart.getPartName());
                    setActivePage(lastEditorPage);
                    showTabs();
                } catch (PartInitException exception) {
                    DsEditorPlugin.INSTANCE.log(exception);
                }
            }

            if (markerHelper.hasMarkers(editingDomain.getResourceSet())) {
                markerHelper.deleteMarkers(editingDomain.getResourceSet());
                if (diagnostic.getSeverity() != Diagnostic.OK) {
                    try {
                        markerHelper.createMarkers(diagnostic);
                    } catch (CoreException exception) {
                        DsEditorPlugin.INSTANCE.log(exception);
                    }
                }
            }
        }
    }

    /**
     * Shows a dialog that asks if conflicting changes should be discarded. <!--
     * begin-user-doc --> <!-- end-user-doc -->
     * 
     * @return true, if successful
     * @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 DsEditor() {
        super();
        initializeEditingDomain();
        dsEditor = this;
    }

    /**
     * This is called during startup. <!-- begin-user-doc --> <!-- end-user-doc
     * -->
     * 
     * @param site
     *            the site
     * @param editorInput
     *            the editor input
     * @generated NOT
     */

    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);
        createModel();
        setSavingProcOk(true);

    }

    /**
     * This sets up the editing domain for the model editor.
     * <!-- begin-user-doc
     * --> <!-- end-user-doc -->
     * 
     * @generated
     */
    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 DsItemProviderAdapterFactory());
        adapterFactory.addAdapterFactory(new ReflectiveItemProviderAdapterFactory());

        // Create the command stack that will notify this editor as commands are
        // executed.
        //
        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) {
                getContainer().getDisplay().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 && mdPage != null && mdPage.getOutLineBlock() != null) {
                            mdPage.getOutLineBlock().setSelectionToViewer(mostRecentCommand.getAffectedObjects());
                        }
                        if (propertySheetPage != null && !propertySheetPage.getControl().isDisposed()) {
                            propertySheetPage.refresh();
                        }
                    }
                });
            }
        });

        // Create the editing domain with a special command stack.
        //
        editingDomain = new AdapterFactoryEditingDomain(adapterFactory, commandStack,
                new HashMap<Resource, Boolean>());
    }

    /**
     * This is here for the listener to be able to call it.
     * <!-- begin-user-doc
     * --> <!-- end-user-doc -->
     * 
     * @generated
     */

    protected void firePropertyChange(int action) {
        super.firePropertyChange(action);
    }

    /**
     * This sets the selection into whichever viewer is active. <!--
     * begin-user-doc --> <!-- end-user-doc -->
     * 
     * @param collection
     *            the new selection to viewer
     * @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 -->.
         * 
         * @param adapterFactory
         *            the adapter factory
         * @generated
         */
        public ReverseAdapterFactoryContentProvider(AdapterFactory adapterFactory) {
            super(adapterFactory);
        }

        /**
         * <!-- begin-user-doc --> <!-- end-user-doc -->.
         * 
         * @param object
         *            the object
         * @return the elements
         * @generated
         */

        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 -->.
         * 
         * @param object
         *            the object
         * @return the children
         * @generated
         */

        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 -->.
         * 
         * @param object
         *            the object
         * @return true, if successful
         * @generated
         */

        public boolean hasChildren(Object object) {
            Object parent = super.getParent(object);
            return parent != null;
        }

        /**
         * <!-- begin-user-doc --> <!-- end-user-doc -->.
         * 
         * @param object
         *            the object
         * @return the parent
         * @generated
         */

        public Object getParent(Object object) {
            return null;
        }
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->.
     * 
     * @param viewerPane
     *            the new current viewer pane
     * @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 -->
     * 
     * @param viewer
     *            the new current viewer
     * @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
     */
    public 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 -->
     * 
     * @throws PartInitException
     * @generated NOT
     */
    public void createModel() {
        URI initialResourceURI = EditUIUtil.getURI(getEditorInput());
        Exception exception = null;
        Resource resource = null;
        try {
            // Load the resource through the editing domain.
            //
            resource = editingDomain.getResourceSet().getResource(initialResourceURI, true);
        } catch (Exception e) {
            exception = e;
            resource = editingDomain.getResourceSet().getResource(initialResourceURI, false);
        }

        try {
            resource.load(Collections.EMPTY_MAP);
            EList<EObject> contents = resource.getContents();

            if (!contents.isEmpty() && contents.get(0) instanceof DocumentRoot) {
                dataService = ((DocumentRoot) contents.get(0)).getData();

            }
        } catch (IOException e) {
            MessageDialog.openError(Display.getCurrent().getActiveShell(), "Error",
                    "Can not load Data Service Configuration");
        }

        Diagnostic diagnostic = analyzeResourceProblems(resource, exception);
        if (diagnostic.getSeverity() != Diagnostic.OK) {
            resourceToDiagnosticMap.put(resource, analyzeResourceProblems(resource, exception));
        }
        editingDomain.getResourceSet().eAdapters().add(problemIndicationAdapter);
    }

    /**
     * Adding pages to the DsEditor
     * 
     */

    protected void addPages() {
        try {

            mdPage = new MasterDetailsPage(this, adapterFactory, editingDomain);
            addPage(DESIGN_VIEW_INDEX, mdPage);
            setPageText(DESIGN_VIEW_INDEX, "Outline");

            sourceEditor = new DsObjectSourceEditor(this, editingDomain);
            addPage(SOURCE_VIEW_INDEX, sourceEditor.getEditor(), sourceEditor.getInput());
            setPageText(SOURCE_VIEW_INDEX, "Source");
            sourceEditor.init();

            dataSourcePage = new DataSourcePage(this, dataService);
            addPage(DATA_SOURCE_PAGE_INDEX, dataSourcePage);
            setPageText(DATA_SOURCE_PAGE_INDEX, "Data Sources");

            addDesignViewAction();

        } catch (PartInitException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 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.wso2.developerstudio.eclipse.ds.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.wso2.developerstudio.eclipse.ds.editor", 0,
                    getString("_UI_CreateModelError_message", resource.getURI()), new Object[] { exception });
        } else {
            return Diagnostic.OK_INSTANCE;
        }
    }

    /**
     * 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 NOT
     */

    protected void pageChange(int pageIndex) {
        super.pageChange(pageIndex);

        switch (pageIndex) {
        case DESIGN_VIEW_INDEX: {

            designViewActivated = true;

            break;
        }
        case SOURCE_VIEW_INDEX: {

            designViewActivated = false;

            break;
        }
        case DATA_SOURCE_PAGE_INDEX: {

            designViewActivated = false;
            if (dataService != null && dataService.getConfig() != null && !dataService.getConfig().isEmpty())
                dataSourcePage.updateDataSourceViewer();
        }
        }

        if (contentOutlinePage != null) {
            handleContentOutlineSelection(contentOutlinePage.getSelection());
        }
    }

    /**
     * Handle the design activated event and make sure the model
     * rebuild with the newly changes.
     * 
     */
    private void saveSourceViewChanges() {

        setSavingProcOk(true);
        if (sourceEditor.isTmpFileHasContent() && sourceEditor.isModelChanged()) {
            DocumentRootImpl nwroot = null;
            DataService nwdata = null;
            DocumentRoot oldroot = null;

            try {
                domainResource = sourceEditor.reconstructModel();
                if (domainResource != null) {
                    if (domainResource.getContents() != null && domainResource.getContents().size() != 0) {
                        if (domainResource.getContents().get(0) != null) {
                            if (domainResource.getContents().get(0) instanceof DocumentRootImpl)
                                nwroot = (DocumentRootImpl) domainResource.getContents().get(0);

                            if (nwroot != null) {
                                if (nwroot.getData() != null) {
                                    nwdata = nwroot.getData();
                                }
                            }
                        }
                    }
                }

                if (editingDomain != null) {
                    if (editingDomain.getResourceSet() != null) {
                        if (editingDomain.getResourceSet().getResources() != null
                                && editingDomain.getResourceSet().getResources().size() != 0) {
                            if (editingDomain.getResourceSet().getResources().get(0) != null) {
                                if (editingDomain.getResourceSet().getResources().get(0).getContents() != null
                                        && editingDomain.getResourceSet().getResources().get(0).getContents()
                                                .size() != 0) {
                                    if (editingDomain.getResourceSet().getResources().get(0).getContents()
                                            .get(0) != null) {
                                        oldroot = (DocumentRoot) editingDomain.getResourceSet().getResources()
                                                .get(0).getContents().get(0);

                                    }
                                }
                            }
                        }
                    }
                }

                SetCommand addDataCommand = new SetCommand(editingDomain, oldroot,
                        DsPackage.Literals.DOCUMENT_ROOT__DATA, nwdata);
                if (addDataCommand.canExecute()) {
                    editingDomain.getCommandStack().execute(addDataCommand);
                    mdPage.getOutLineBlock().getViewer().setAutoExpandLevel(TreeViewer.ALL_LEVELS);

                    updateAllPagesWithNewDataServiceObject(nwdata);
                } else {
                    //
                }

            } catch (Exception e) {
                MessageDialog.openError(Display.getCurrent().getActiveShell(),
                        "Incomplete Data Service Configuration", e.getMessage());
                setSavingProcOk(false);
                this.setActivePage(SOURCE_VIEW_INDEX);
            }
        }
    }

    /**
     * This is how the framework determines which interfaces we implement. <!--
     * begin-user-doc --> <!-- end-user-doc -->
     * 
     * @param key
     *            the key
     * @return the adapter
     * @generated
     */
    @SuppressWarnings("rawtypes")
    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 --> <!-- end-user-doc -->
     * 
     * @return the content outline page
     * @generated
     */
    public IContentOutlinePage getContentOutlinePage() {
        if (contentOutlinePage == null) {
            // The content outline is just a tree.
            //
            class MyContentOutlinePage extends ContentOutlinePage {

                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));
                    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);
                    }
                }

                public void makeContributions(IMenuManager menuManager, IToolBarManager toolBarManager,
                        IStatusLineManager statusLineManager) {
                    super.makeContributions(menuManager, toolBarManager, statusLineManager);
                    contentOutlineStatusLineManager = statusLineManager;
                }

                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
     * --> <!-- end-user-doc -->
     * 
     * @return the property sheet page
     * @generated NOT
     */
    public IPropertySheetPage getPropertySheetPage() {
        if (propertySheetPage == null) {
            propertySheetPage = new CustomExtendedPropertySheetPage(editingDomain);
            propertySheetPage.setPropertySourceProvider(new CustomAdapterFactoryContentProvider(adapterFactory));
        }

        return propertySheetPage;
    }

    /**
     * Customized property sheet sorting.
     */
    private class CustomExtendedPropertySheetPage extends ExtendedPropertySheetPage {

        /**
         * The Class CustomPropertySheetSorter.
         */
        private class CustomPropertySheetSorter extends PropertySheetSorter {

            /**
             * Sort.
             * 
             * @param entries
             *            the entries {@inheritDoc}
             */
            public void sort(IPropertySheetEntry[] entries) {
                // Do nothing.
            }
        }

        /**
         * Instantiates a new custom extended property sheet page.
         * 
         * @param editingDomain
         *            the editing domain
         */
        public CustomExtendedPropertySheetPage(AdapterFactoryEditingDomain editingDomain) {
            super(editingDomain);
            setSorter(new CustomPropertySheetSorter());
        }

        /**
         * Sets the selection to viewer.
         * 
         * @param selection
         *            the new selection to viewer {@inheritDoc}
         */
        public void setSelectionToViewer(List<?> selection) {
            DsEditor.this.setSelectionToViewer(selection);
            DsEditor.this.setFocus();
        }

        /**
         * Sets the action bars.
         * 
         * @param actionBars
         *            the new action bars {@inheritDoc}
         */
        public void setActionBars(IActionBars actionBars) {
            super.setActionBars(actionBars);
            getActionBarContributor().shareGlobalActions(this, actionBars);
        }

        /**
         * Sets the sorter.
         * 
         * @param sorter
         *            the new sorter {@inheritDoc}
         */
        protected void setSorter(PropertySheetSorter sorter) {
            if (sorter instanceof CustomPropertySheetSorter) {
                sorter = new CustomPropertySheetSorter();
            }
            super.setSorter(sorter);
        }
    }

    /**
     * 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 NOT
     */

    public boolean isDirty() {

        if (((BasicCommandStack) editingDomain.getCommandStack()).isSaveNeeded() || isSourceModified) {
            return true;
        } else {
            return false;
        }

    }

    /**
     * This is for implementing {@link IEditorPart} and simply saves the model
     * file.
     * <!-- begin-user-doc --> <!-- end-user-doc -->
     * 
     * @generated NOT
     */

    public void doSave(IProgressMonitor progressMonitor) {
        // Save only resources that have actually changed.
        //
        if (this.getActivePage() == SOURCE_VIEW_INDEX) {
            saveSourceViewChanges();
        }

        if (isSavingProcOk()) {

            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.
                //

                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();

                if (isSourceModified)
                    setSourceModified(false);
                firePropertyChange(IEditorPart.PROP_DIRTY);

            } catch (Exception exception) {
                // Something went wrong that shouldn't.
                //
                DsEditorPlugin.INSTANCE.log(exception);
            }
            updateProblemIndication = true;
            updateProblemIndication();

            if (designViewActivated && !isSourceModified) {

                try {

                    deleteObjectsFromTheModel();
                    sourceEditor.getEditor().getDocumentProvider().resetDocument(getEditorInput());
                } catch (CoreException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

    }

    private void deleteObjectsFromTheModel() {
        if (dataService.getFeatureAllowRoles() != null) {
            if (StringUtils.isEmpty(dataService.getFeatureAllowRoles().getValue())) {
                SetCommand setCmd = new SetCommand(editingDomain, dataService,
                        DsPackage.Literals.DATA_SERVICE__FEATURE_ALLOW_ROLES, null);
                if (setCmd.canExecute()) {
                    editingDomain.getCommandStack().execute(setCmd);
                }
            }
        }
        if (dataService.getPolicy() != null) {
            if (StringUtils.isEmpty(dataService.getPolicy().getKey())) {
                SetCommand setCmd = new SetCommand(editingDomain, dataService,
                        DsPackage.Literals.DATA_SERVICE__POLICY, null);
                if (setCmd.canExecute()) {
                    editingDomain.getCommandStack().execute(setCmd);
                }
            }
        }

    }

    /**
     * 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 -->
     * 
     * @return true, if is save as allowed
     * @generated
     */

    public boolean isSaveAsAllowed() {
        return true;
    }

    /**
     * This also changes the editor's input.
     * <!-- begin-user-doc --> <!--
     * end-user-doc -->
     * 
     * @generated
     */

    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 -->.
     * 
     * @param uri
     *            the uri
     * @param editorInput
     *            the editor input
     * @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 -->.
     * 
     * @param marker
     *            the marker
     * @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) {
            DsEditorPlugin.INSTANCE.log(exception);
        }
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->.
     * 
     * @generated
     */

    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 -->.
     * 
     * @param selection
     *            the new status line manager
     * @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 -->
     * 
     * @param key
     *            the key
     * @return the string
     * @generated
     */
    private static String getString(String key) {
        return DsEditorPlugin.INSTANCE.getString(key);
    }

    /**
     * This looks up a string in plugin.properties, making a substitution. <!--
     * begin-user-doc --> <!-- end-user-doc -->
     * 
     * @param key
     *            the key
     * @param s1
     *            the s1
     * @return the string
     * @generated
     */
    private static String getString(String key, Object s1) {
        return DsEditorPlugin.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 -->
     * 
     * @param menuManager
     *            the menu manager
     * @generated
     */
    public void menuAboutToShow(IMenuManager menuManager) {
        ((IMenuListener) getEditorSite().getActionBarContributor()).menuAboutToShow(menuManager);
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->.
     * 
     * @return the action bar contributor
     * @generated
     */
    public EditingDomainActionBarContributor getActionBarContributor() {
        return (EditingDomainActionBarContributor) getEditorSite().getActionBarContributor();
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->.
     * 
     * @return the action bars
     * @generated
     */
    public IActionBars getActionBars() {
        return getActionBarContributor().getActionBars();
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->.
     * 
     * @return the adapter factory
     * @generated
     */
    public AdapterFactory getAdapterFactory() {
        return adapterFactory;
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->.
     * 
     * @generated NOT
     */

    public void dispose() {
        updateProblemIndication = false;

        ResourcesPlugin.getWorkspace().removeResourceChangeListener(resourceChangeListener);

        getSite().getPage().removePartListener(partListener);

        adapterFactory.dispose();
        if (sourceEditor.getTempTag() != null) {
            sourceEditor.getTempTag().clearAndEnd();
        }

        if (getActionBarContributor().getActiveEditor() == this) {
            getActionBarContributor().setActiveEditor(null);
        }

        if (propertySheetPage != null) {
            propertySheetPage.dispose();
        }

        if (contentOutlinePage != null) {
            contentOutlinePage.dispose();
        }

        super.dispose();
    }

    /**
     * Returns whether the outline view should be presented to the user. <!--
     * begin-user-doc --> <!-- end-user-doc -->
     * 
     * @return true, if successful
     * @generated
     */
    protected boolean showOutlineView() {
        return true;
    }

    public void setSourceModified(boolean isSourceModified) {
        this.isSourceModified = isSourceModified;
    }

    public void fireTextPropertyChange() {
        firePropertyChange(IEditorPart.PROP_DIRTY);
    }

    public static int getDesignViewIndex() {
        return DESIGN_VIEW_INDEX;
    }

    public static int getSourceViewIndex() {
        return SOURCE_VIEW_INDEX;
    }

    /**
     * update the all data service references to new data service object
     * 
     * @param newDataService
     */
    private void updateAllPagesWithNewDataServiceObject(DataService newDataService) {

        this.dataService = newDataService;
        dataSourcePage.setDataService(newDataService);
    }

    public MasterDetailsPage getMdPage() {
        return mdPage;
    }

    public DataService getDataService() {
        return dataService;
    }

    private void addDesignViewAction() {

        designViewActionHandler = new DesignViewActionHandler();

        Display.getCurrent().addFilter(SWT.KeyDown, new Listener() {

            public void handleEvent(Event event) {
                IEditorPart editorPart = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
                        .getActiveEditor();
                if (editorPart == DsEditor.this) {

                    DsEditor dsEditor = (DsEditor) editorPart;

                    if ((dsEditor.getActivePage() == DESIGN_VIEW_INDEX)
                            && !DetailSectionUiUtil.isFocusedOnDetailSection) {
                        if (event.keyCode == SWT.DEL) {

                            designViewActionHandler.delete(dsEditor);
                        }
                    }
                }
            }
        });
    }

    public boolean isSavingProcOk() {
        return isSavingProcOk;
    }

    public void setSavingProcOk(boolean isSavingProcOk) {
        this.isSavingProcOk = isSavingProcOk;
    }

}