old/org.eclipse.emf.ecp.validation/src/org/eclipse/emf/ecp/validation/ValidationView.java - emfclient/org.eclipse.emf.ecp.other - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008-2011 Chair for Applied Software Engineering,
  * Technische Universitaet Muenchen.
  * 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:
  ******************************************************************************/
 package org.eclipse.emf.ecp.validation;

 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.emf.common.notify.Notification;
 import org.eclipse.emf.common.notify.impl.AdapterImpl;
 import org.eclipse.emf.common.util.BasicDiagnostic;
 import org.eclipse.emf.common.util.Diagnostic;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.util.EcoreUtil;
 import org.eclipse.emf.ecp.common.TableViewerColumnSorter;
 import org.eclipse.emf.ecp.common.commands.ECPCommand;
 import org.eclipse.emf.ecp.common.model.ECPWorkspaceManager;
 import org.eclipse.emf.ecp.common.model.NoWorkspaceException;
 import org.eclipse.emf.ecp.common.model.workSpaceModel.ECPProject;
 import org.eclipse.emf.ecp.common.model.workSpaceModel.ECPWorkspace;
 import org.eclipse.emf.ecp.common.model.workSpaceModel.WorkSpaceModelPackage;
 import org.eclipse.emf.ecp.common.utilities.ActionHelper;
 import org.eclipse.emf.ecp.validation.filter.FilterTableViewer;
 import org.eclipse.emf.ecp.validation.filter.ValidationFilter;
 import org.eclipse.emf.ecp.validation.providers.ConstraintLabelProvider;
 import org.eclipse.emf.ecp.validation.providers.SeverityLabelProvider;
 import org.eclipse.emf.ecp.validation.providers.ValidationContentProvider;
 import org.eclipse.emf.ecp.validation.providers.ValidationFilterLabelProvider;
 import org.eclipse.emf.ecp.validation.providers.ValidationLabelProvider;
 import org.eclipse.emf.ecp.validation.refactoring.strategy.RefactoringResult;
 import org.eclipse.emf.ecp.validation.refactoring.strategy.RefactoringStrategy;
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.action.IToolBarManager;
 import org.eclipse.jface.dialogs.DialogSettings;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.viewers.ColumnLabelProvider;
 import org.eclipse.jface.viewers.DoubleClickEvent;
 import org.eclipse.jface.viewers.IDoubleClickListener;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.TableViewerColumn;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.TableCursor;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.events.KeyListener;
 import org.eclipse.swt.events.MenuDetectEvent;
 import org.eclipse.swt.events.MenuDetectListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Menu;
 import org.eclipse.swt.widgets.MenuItem;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableItem;
 import org.eclipse.ui.IActionBars;
 import org.eclipse.ui.dialogs.ListDialog;
 import org.eclipse.ui.part.ViewPart;

 /**
  * The Validation View.
  *
  * @author Carmen Carlan
  *
  */
 public class ValidationView extends ViewPart {

 	private TableViewer tableViewer;

 	private DialogSettings settings;

 	private String filename;

 	private final String viewId = "org.eclipse.emf.ecp.validation.customValidationView";

 	private AdapterImpl workspaceListenerAdapter;

 	private Shell shell;

 	private Table table;

 	private ArrayList<ValidationFilter> validationFilters;

 	private TableItem tableItem;

 	private ECPWorkspace workspace;

 	private ValidationLabelProvider labelProvider;

 	/**
 	 * Default constructor.
 	 */
 	public ValidationView() {
 		IPath path = org.eclipse.emf.ecp.common.Activator.getDefault().getStateLocation();
 		filename = path.append("settings.txt").toOSString();
 		settings = new DialogSettings("Top");
 		try {
 			settings.load(filename);
 		} catch (IOException e) {
 			// Do nothing.
 		}

 		try {
 			workspace = ECPWorkspaceManager.getInstance().getWorkSpace();
 		} catch (NoWorkspaceException e) {
 			Activator.getDefault().logException(e.getMessage(), e);
 			return;
 		}
 		workspaceListenerAdapter = new AdapterImpl() {

 			@Override
 			public void notifyChanged(Notification msg) {
 				if ((msg.getFeatureID(ECPWorkspace.class)) == WorkSpaceModelPackage.ECP_WORKSPACE__PROJECTS) {
 					if (msg.getOldValue() != null
 						&& (msg.getOldValue() instanceof List<?> || msg.getOldValue() instanceof ECPProject)) {
 						tableViewer.setInput(new ArrayList<IStatus>());
 					}

 				}
 				super.notifyChanged(msg);
 			}
 		};
 		workspace.eAdapters().add(workspaceListenerAdapter);
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@Override
 	public void createPartControl(Composite parent) {
 		tableViewer = new FilterTableViewer(parent, SWT.SINGLE | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL
 			| SWT.FULL_SELECTION);
 		createTable();
 		this.shell = parent.getShell();
 		IActionBars bars = getViewSite().getActionBars();
 		IToolBarManager menuManager = bars.getToolBarManager();
 		OpenFilterDialogAction openFilterDialogAction = new OpenFilterDialogAction();
 		openFilterDialogAction.setImageDescriptor(Activator.getImageDescriptor("icons/openfilterlist.png"));
 		openFilterDialogAction.setToolTipText("Add one or more filters to be applied to the validation view.");
 		menuManager.add(openFilterDialogAction);
 		hookDoubleClickAction();
 		tableViewer.getTable().addMenuDetectListener(new MenuDetectListenerImplementation());
 	}

 	/**
 	 * Creates the table which will be displayed in the view.
 	 */
 	private void createTable() {
 		// CREATE TABLE
 		table = tableViewer.getTable();
 		GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
 		gridData.horizontalSpan = 5;
 		table.setLayoutData(gridData);
 		table.setLinesVisible(true);
 		table.setHeaderVisible(true);
 		TableViewerColumn column;

 		// severity column
 		column = new TableViewerColumn(tableViewer, SWT.CENTER, 0);
 		column.getColumn().setText("Severity");
 		column.getColumn().setWidth(50);
 		setLabelProviderAndComparator(column, new SeverityLabelProvider());

 		// constraint column
 		column = new TableViewerColumn(tableViewer, SWT.LEFT, 1);
 		column.getColumn().setText("Constraint");
 		column.getColumn().setWidth(200);
 		setLabelProviderAndComparator(column, new ConstraintLabelProvider());

 		// affected model element column
 		column = new TableViewerColumn(tableViewer, SWT.LEFT, 2);
 		column.getColumn().setText("Affected ModelElement");
 		column.getColumn().setWidth(200);
 		labelProvider = new ValidationLabelProvider();
 		setLabelProviderAndComparator(column, labelProvider);

 		// content provider
 		tableViewer.setContentProvider(new ValidationContentProvider());
 		TableCursor tableCursor = new TableCursor(table, SWT.NONE);
 		tableCursor.setVisible(false);
 		table.addKeyListener(new KeyListener() {

 			public void keyReleased(KeyEvent e) {
 				if (e.stateMask == SWT.ALT && e.keyCode == 'r') {
 					tableItem = ((Table) e.getSource()).getSelection()[0];
 					startRefactoring();
 				}
 			}

 			public void keyPressed(KeyEvent e) {
 				// nothing to do here
 			}
 		});
 	}

 	/**
 	 * Sets the LabelProvider and Comparator for a specific column.
 	 *
 	 * @param column
 	 * @param labelProvider
 	 */
 	private void setLabelProviderAndComparator(TableViewerColumn column, ColumnLabelProvider labelProvider) {
 		column.setLabelProvider(labelProvider);
 		column.getViewer().setComparator(new TableViewerColumnSorter(tableViewer, column, labelProvider));
 	}

 	/**
 	 * Attaches a double-click action to the view.
 	 */
 	private void hookDoubleClickAction() {
 		tableViewer.addDoubleClickListener(new IDoubleClickListener() {

 			public void doubleClick(DoubleClickEvent event) {
 				IStructuredSelection selection = (IStructuredSelection) event.getSelection();
 				IStatus constraintStatus = (IStatus) selection.getFirstElement();
 				BasicDiagnostic inputElement = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(constraintStatus);
 				EObject me = (EObject) inputElement.getData().get(0);
 				if (me instanceof EObject) {
 					ActionHelper.openModelElement(me, viewId);
 				}
 			}

 		});
 	}

 	/**
 	 * Gets the refactoring strategies defined for the plug-in.
 	 *
 	 * @param status
 	 * @return
 	 */
 	private ArrayList<RefactoringStrategy> getRefactoringStrategiesFromExtensionPoint(IStatus status) {
 		ArrayList<RefactoringStrategy> refactoringStrategies = new ArrayList<RefactoringStrategy>();
 		IConfigurationElement[] config = Platform.getExtensionRegistry().getConfigurationElementsFor(
 			"org.eclipse.emf.ecp.bulidInValidation.refactoring.strategies");
 		for (IConfigurationElement element : config) {
 			try {
 				if (element.getAttribute("applicableFor").equals(status.getCode())) {
 					final Object object = element.createExecutableExtension("strategy");
 					RefactoringStrategy strategy = (RefactoringStrategy) object;
 					strategy.setConstraintStatus(status);
 					refactoringStrategies.add(strategy);
 				}
 			} catch (CoreException e) {
 				Activator.getDefault().logWarning("Exception loading refactoring strategies from the extension point",
 					e);
 			}

 		}
 		return refactoringStrategies;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@Override
 	public void setFocus() {

 	}

 	/**
 	 * Updates the validation view table for the new live validation.
 	 *
 	 * @param diagnostic
 	 *            validation results.
 	 */
 	public void updateTable(Diagnostic diagnostic) {
 		tableViewer.setInput(diagnostic);
 		// this is added to fix the bug regarding context menu not being shown
 		// correctly in navigator, after validation viewer was shown.
 		tableViewer.getTable().setFocus();

 	}

 	/**
 	 * Gets the filters we defined for the plug-in.
 	 *
 	 * @return
 	 */
 	private ArrayList<ValidationFilter> getFiltersFromExtensionPoint() {
 		if (validationFilters == null) {
 			validationFilters = new ArrayList<ValidationFilter>();
 			IConfigurationElement[] config = Platform.getExtensionRegistry().getConfigurationElementsFor(
 				"org.eclipse.emf.ecp.validation.filters");
 			for (IConfigurationElement element : config) {
 				try {
 					Object object = element.createExecutableExtension("filter");
 					if (object instanceof ValidationFilter) {
 						ValidationFilter validationFilter = (ValidationFilter) object;
 						if (validationFilter.init()) {
 							validationFilters.add(validationFilter);
 						}
 					}
 				} catch (CoreException e) {
 					e.printStackTrace();
 				}
 			}
 		}
 		return validationFilters;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@Override
 	public void dispose() {
 		workspace.eAdapters().remove(workspaceListenerAdapter);
 		if (labelProvider != null) {
 			labelProvider.dispose();
 		}
 		super.dispose();
 	}

 	/**
 	 * Starts refactoring.
 	 */
 	private void startRefactoring() {
 		IStatus constraintStatus = (IStatus) tableItem.getData();
 		List<?> abstractRefactoringStrategies = getRefactoringStrategiesFromExtensionPoint(constraintStatus);
 		if (abstractRefactoringStrategies.isEmpty()) {
 			return;
 		}
 		RefactoringResult refactoringResult = RefactoringResult.ABORT;
 		if (abstractRefactoringStrategies.size() == 1) {
 			RefactoringStrategy refactoringStrategy = (RefactoringStrategy) abstractRefactoringStrategies.get(0);
 			refactoringStrategy.setShell(shell);
 			refactoringResult = refactoringStrategy.startRefactoring();
 		} else {
 			// otherwise show list dialog
 			ListDialog listDialog = new ListDialog(shell);
 			listDialog.setInput(abstractRefactoringStrategies);
 			listDialog.setLabelProvider(new RefactoringStrategyLabelProvider());
 			listDialog.setContentProvider(new SimpleContentProvider());
 			listDialog.setTitle("Choose a refactoring strategy");
 			listDialog.open();
 			Object[] result = listDialog.getResult();
 			if (result != null && result.length > 0) {
 				RefactoringStrategy refactoringStrategy = (RefactoringStrategy) result[0];
 				refactoringStrategy.setShell(shell);
 				refactoringResult = refactoringStrategy.startRefactoring();
 			}
 		}
 		if (refactoringResult == RefactoringResult.NO_VIOLATION
 			|| refactoringResult == RefactoringResult.SUCCESS_CREATE) {
 			tableItem.dispose();
 		}
 	}

 	/**
 	 * Empty the table from the view.
 	 *
 	 * @param status
 	 */
 	private void removeAllTableItemsForEObject(final IStatus status) {
 		BasicDiagnostic inputElement1 = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(status);
 		EObject deletee = (EObject) inputElement1.getData().get(0);
 		for (TableItem tableItem : tableViewer.getTable().getItems()) {
 			IStatus constraintStatus = (IStatus) tableItem.getData();
 			BasicDiagnostic inputElement2 = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(constraintStatus);
 			EObject modelElement = (EObject) inputElement2.getData().get(0);
 			if (deletee == modelElement) {
 				tableItem.dispose();
 			}
 		}
 	}

 	/**
 	 * Context menu listener.
 	 */
 	private final class MenuDetectListenerImplementation implements MenuDetectListener {

 		public void menuDetected(MenuDetectEvent e) {
 			// get the table
 			Table table = (Table) e.getSource();
 			if (table.getSelection() == null || table.getSelection().length == 0) {
 				return;
 			}
 			// get the first table item that was selected (no multiple select)
 			tableItem = table.getSelection()[0];
 			// extract the violation status
 			final IStatus status = (IStatus) tableItem.getData();
 			// create the menu
 			Menu leftClickMenu = new Menu(shell, SWT.POP_UP);
 			// add refactoring menu item if refactoring strategies are available
 			List<RefactoringStrategy> refactoringStrategies = getRefactoringStrategiesFromExtensionPoint(status);
 			if (refactoringStrategies.size() != 0) {
 				final MenuItem refactorMenuItem = new MenuItem(leftClickMenu, SWT.NONE);
 				// add the menu item
 				refactorMenuItem.setData(tableItem);
 				refactorMenuItem.setText("Perform refactoring");
 				refactorMenuItem.setImage(Activator.getImageDescriptor("icons/bell.png").createImage());
 				// refactorMenuItem.setData(data)
 				refactorMenuItem.addSelectionListener(new RefactoringSelectionListener());
 			}
 			// // ignore constraint menu item
 			// MenuItem ignoreMenuItem = new MenuItem(leftClickMenu, SWT.NONE);
 			// ignoreMenuItem.setData(refactoringStrategies);
 			// ignoreMenuItem.setText("Ignore violation");
 			// ignoreMenuItem.setImage(Activator.getImageDescriptor(
 			// "icons/bell_delete.png").createImage());
 			// delete model element menu item
 			MenuItem deleteMenuItem = new MenuItem(leftClickMenu, SWT.NONE);
 			deleteMenuItem.setData(refactoringStrategies);
 			deleteMenuItem.setText("Delete underlying element");
 			deleteMenuItem.setImage(Activator.getImageDescriptor("icons/delete.png").createImage());
 			deleteMenuItem.addSelectionListener(new SelectionAdapter() {

 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					BasicDiagnostic inputElement = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(status);
 					EObject target = (EObject) inputElement.getData().get(0);
 					if (MessageDialog.openQuestion(shell, "Confirm deletion", "Do you really wish to delete "
 						+ target.getClass().getSimpleName() + "?")) {
 						new ECPCommand(target) {

 							@Override
 							protected void doRun() {
 								BasicDiagnostic inputElement = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(status);
 								EObject target = (EObject) inputElement.getData().get(0);
 								EcoreUtil.delete(target);
 							}
 						}.run(false);
 					}
 					removeAllTableItemsForEObject(status);
 				}
 			});
 			// set menu to visible
 			leftClickMenu.setVisible(true);
 		}

 		/**
 		 * Refactoring selection listener.
 		 */
 		private final class RefactoringSelectionListener implements SelectionListener {
 			public void widgetSelected(SelectionEvent e) {
 				// only show selection dialog if there is more than one
 				// refactoring
 				startRefactoring();
 			}

 			public void widgetDefaultSelected(SelectionEvent e) {
 				// nothing to do here
 			}
 		}
 	}

 	/**
 	 * The filter dialog action.
 	 *
 	 */
 	private final class OpenFilterDialogAction extends Action {

 		@Override
 		public void run() {
 			ValidationFilterList validationFilterList = new ValidationFilterList(shell, getFiltersFromExtensionPoint(),
 				new SimpleContentProvider(), new ValidationFilterLabelProvider(), "Test");
 			validationFilterList.setTitle("Choose one or more filters");
 			validationFilterList.setInitialSelections(tableViewer.getFilters());
 			validationFilterList.open();
 			if (validationFilterList.getReturnCode() == IStatus.OK) {
 				removeAllFilters();
 				for (Object object : validationFilterList.getResult()) {
 					if (object instanceof ValidationFilter) {
 						ValidationFilter validationFilter = (ValidationFilter) object;
 						applyFilter(validationFilter);
 					}
 				}
 			}
 		}

 		private void applyFilter(ValidationFilter validationFilter) {
 			tableViewer.addFilter(validationFilter);
 		}

 		private void removeAllFilters() {
 			tableViewer.resetFilters();
 		}
 	}

 	/**
 	 * Label provider for a refactoring strategy.
 	 */
 	private final class RefactoringStrategyLabelProvider extends LabelProvider {

 		@Override
 		public Image getImage(Object element) {
 			return Activator.getImageDescriptor("icons/bell.png").createImage();
 		}

 		@Override
 		public String getText(Object element) {
 			return ((RefactoringStrategy) ((Object[]) element)[0]).getDescription();
 		}
 	}

 	/**
 	 * Simple structured content provider for lists.
 	 */
 	private final class SimpleContentProvider implements IStructuredContentProvider {

 		public Object[] getElements(Object inputElement) {
 			List<?> list = (List<?>) inputElement;
 			if (list.isEmpty()) {
 				return new Object[0];
 			}
 			return list.toArray();
 		}

 		public void dispose() {

 		}

 		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

 		}
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2008-2011 Chair for Applied Software Engineering,
	* Technische Universitaet Muenchen.
	* 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:
	******************************************************************************/
	package org.eclipse.emf.ecp.validation;

	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IConfigurationElement;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.emf.common.notify.Notification;
	import org.eclipse.emf.common.notify.impl.AdapterImpl;
	import org.eclipse.emf.common.util.BasicDiagnostic;
	import org.eclipse.emf.common.util.Diagnostic;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.util.EcoreUtil;
	import org.eclipse.emf.ecp.common.TableViewerColumnSorter;
	import org.eclipse.emf.ecp.common.commands.ECPCommand;
	import org.eclipse.emf.ecp.common.model.ECPWorkspaceManager;
	import org.eclipse.emf.ecp.common.model.NoWorkspaceException;
	import org.eclipse.emf.ecp.common.model.workSpaceModel.ECPProject;
	import org.eclipse.emf.ecp.common.model.workSpaceModel.ECPWorkspace;
	import org.eclipse.emf.ecp.common.model.workSpaceModel.WorkSpaceModelPackage;
	import org.eclipse.emf.ecp.common.utilities.ActionHelper;
	import org.eclipse.emf.ecp.validation.filter.FilterTableViewer;
	import org.eclipse.emf.ecp.validation.filter.ValidationFilter;
	import org.eclipse.emf.ecp.validation.providers.ConstraintLabelProvider;
	import org.eclipse.emf.ecp.validation.providers.SeverityLabelProvider;
	import org.eclipse.emf.ecp.validation.providers.ValidationContentProvider;
	import org.eclipse.emf.ecp.validation.providers.ValidationFilterLabelProvider;
	import org.eclipse.emf.ecp.validation.providers.ValidationLabelProvider;
	import org.eclipse.emf.ecp.validation.refactoring.strategy.RefactoringResult;
	import org.eclipse.emf.ecp.validation.refactoring.strategy.RefactoringStrategy;
	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.action.IToolBarManager;
	import org.eclipse.jface.dialogs.DialogSettings;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.viewers.ColumnLabelProvider;
	import org.eclipse.jface.viewers.DoubleClickEvent;
	import org.eclipse.jface.viewers.IDoubleClickListener;
	import org.eclipse.jface.viewers.IStructuredContentProvider;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.TableViewerColumn;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.TableCursor;
	import org.eclipse.swt.events.KeyEvent;
	import org.eclipse.swt.events.KeyListener;
	import org.eclipse.swt.events.MenuDetectEvent;
	import org.eclipse.swt.events.MenuDetectListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Menu;
	import org.eclipse.swt.widgets.MenuItem;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableItem;
	import org.eclipse.ui.IActionBars;
	import org.eclipse.ui.dialogs.ListDialog;
	import org.eclipse.ui.part.ViewPart;

	/**
	* The Validation View.
	*
	* @author Carmen Carlan
	*
	*/
	public class ValidationView extends ViewPart {

	private TableViewer tableViewer;

	private DialogSettings settings;

	private String filename;

	private final String viewId = "org.eclipse.emf.ecp.validation.customValidationView";

	private AdapterImpl workspaceListenerAdapter;

	private Shell shell;

	private Table table;

	private ArrayList<ValidationFilter> validationFilters;

	private TableItem tableItem;

	private ECPWorkspace workspace;

	private ValidationLabelProvider labelProvider;

	/**
	* Default constructor.
	*/
	public ValidationView() {
	IPath path = org.eclipse.emf.ecp.common.Activator.getDefault().getStateLocation();
	filename = path.append("settings.txt").toOSString();
	settings = new DialogSettings("Top");
	try {
	settings.load(filename);
	} catch (IOException e) {
	// Do nothing.
	}

	try {
	workspace = ECPWorkspaceManager.getInstance().getWorkSpace();
	} catch (NoWorkspaceException e) {
	Activator.getDefault().logException(e.getMessage(), e);
	return;
	}
	workspaceListenerAdapter = new AdapterImpl() {

	@Override
	public void notifyChanged(Notification msg) {
	if ((msg.getFeatureID(ECPWorkspace.class)) == WorkSpaceModelPackage.ECP_WORKSPACE__PROJECTS) {
	if (msg.getOldValue() != null
	&& (msg.getOldValue() instanceof List<?> \|\| msg.getOldValue() instanceof ECPProject)) {
	tableViewer.setInput(new ArrayList<IStatus>());
	}

	}
	super.notifyChanged(msg);
	}
	};
	workspace.eAdapters().add(workspaceListenerAdapter);
	}

	/**
	* {@inheritDoc}
	*/
	@Override
	public void createPartControl(Composite parent) {
	tableViewer = new FilterTableViewer(parent, SWT.SINGLE \| SWT.BORDER \| SWT.V_SCROLL \| SWT.H_SCROLL
	\| SWT.FULL_SELECTION);
	createTable();
	this.shell = parent.getShell();
	IActionBars bars = getViewSite().getActionBars();
	IToolBarManager menuManager = bars.getToolBarManager();
	OpenFilterDialogAction openFilterDialogAction = new OpenFilterDialogAction();
	openFilterDialogAction.setImageDescriptor(Activator.getImageDescriptor("icons/openfilterlist.png"));
	openFilterDialogAction.setToolTipText("Add one or more filters to be applied to the validation view.");
	menuManager.add(openFilterDialogAction);
	hookDoubleClickAction();
	tableViewer.getTable().addMenuDetectListener(new MenuDetectListenerImplementation());
	}

	/**
	* Creates the table which will be displayed in the view.
	*/
	private void createTable() {
	// CREATE TABLE
	table = tableViewer.getTable();
	GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
	gridData.horizontalSpan = 5;
	table.setLayoutData(gridData);
	table.setLinesVisible(true);
	table.setHeaderVisible(true);
	TableViewerColumn column;

	// severity column
	column = new TableViewerColumn(tableViewer, SWT.CENTER, 0);
	column.getColumn().setText("Severity");
	column.getColumn().setWidth(50);
	setLabelProviderAndComparator(column, new SeverityLabelProvider());

	// constraint column
	column = new TableViewerColumn(tableViewer, SWT.LEFT, 1);
	column.getColumn().setText("Constraint");
	column.getColumn().setWidth(200);
	setLabelProviderAndComparator(column, new ConstraintLabelProvider());

	// affected model element column
	column = new TableViewerColumn(tableViewer, SWT.LEFT, 2);
	column.getColumn().setText("Affected ModelElement");
	column.getColumn().setWidth(200);
	labelProvider = new ValidationLabelProvider();
	setLabelProviderAndComparator(column, labelProvider);

	// content provider
	tableViewer.setContentProvider(new ValidationContentProvider());
	TableCursor tableCursor = new TableCursor(table, SWT.NONE);
	tableCursor.setVisible(false);
	table.addKeyListener(new KeyListener() {

	public void keyReleased(KeyEvent e) {
	if (e.stateMask == SWT.ALT && e.keyCode == 'r') {
	tableItem = ((Table) e.getSource()).getSelection()[0];
	startRefactoring();
	}
	}

	public void keyPressed(KeyEvent e) {
	// nothing to do here
	}
	});
	}

	/**
	* Sets the LabelProvider and Comparator for a specific column.
	*
	* @param column
	* @param labelProvider
	*/
	private void setLabelProviderAndComparator(TableViewerColumn column, ColumnLabelProvider labelProvider) {
	column.setLabelProvider(labelProvider);
	column.getViewer().setComparator(new TableViewerColumnSorter(tableViewer, column, labelProvider));
	}

	/**
	* Attaches a double-click action to the view.
	*/
	private void hookDoubleClickAction() {
	tableViewer.addDoubleClickListener(new IDoubleClickListener() {

	public void doubleClick(DoubleClickEvent event) {
	IStructuredSelection selection = (IStructuredSelection) event.getSelection();
	IStatus constraintStatus = (IStatus) selection.getFirstElement();
	BasicDiagnostic inputElement = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(constraintStatus);
	EObject me = (EObject) inputElement.getData().get(0);
	if (me instanceof EObject) {
	ActionHelper.openModelElement(me, viewId);
	}
	}

	});
	}

	/**
	* Gets the refactoring strategies defined for the plug-in.
	*
	* @param status
	* @return
	*/
	private ArrayList<RefactoringStrategy> getRefactoringStrategiesFromExtensionPoint(IStatus status) {
	ArrayList<RefactoringStrategy> refactoringStrategies = new ArrayList<RefactoringStrategy>();
	IConfigurationElement[] config = Platform.getExtensionRegistry().getConfigurationElementsFor(
	"org.eclipse.emf.ecp.bulidInValidation.refactoring.strategies");
	for (IConfigurationElement element : config) {
	try {
	if (element.getAttribute("applicableFor").equals(status.getCode())) {
	final Object object = element.createExecutableExtension("strategy");
	RefactoringStrategy strategy = (RefactoringStrategy) object;
	strategy.setConstraintStatus(status);
	refactoringStrategies.add(strategy);
	}
	} catch (CoreException e) {
	Activator.getDefault().logWarning("Exception loading refactoring strategies from the extension point",
	e);
	}

	}
	return refactoringStrategies;
	}

	/**
	* {@inheritDoc}
	*/
	@Override
	public void setFocus() {

	}

	/**
	* Updates the validation view table for the new live validation.
	*
	* @param diagnostic
	* validation results.
	*/
	public void updateTable(Diagnostic diagnostic) {
	tableViewer.setInput(diagnostic);
	// this is added to fix the bug regarding context menu not being shown
	// correctly in navigator, after validation viewer was shown.
	tableViewer.getTable().setFocus();

	}

	/**
	* Gets the filters we defined for the plug-in.
	*
	* @return
	*/
	private ArrayList<ValidationFilter> getFiltersFromExtensionPoint() {
	if (validationFilters == null) {
	validationFilters = new ArrayList<ValidationFilter>();
	IConfigurationElement[] config = Platform.getExtensionRegistry().getConfigurationElementsFor(
	"org.eclipse.emf.ecp.validation.filters");
	for (IConfigurationElement element : config) {
	try {
	Object object = element.createExecutableExtension("filter");
	if (object instanceof ValidationFilter) {
	ValidationFilter validationFilter = (ValidationFilter) object;
	if (validationFilter.init()) {
	validationFilters.add(validationFilter);
	}
	}
	} catch (CoreException e) {
	e.printStackTrace();
	}
	}
	}
	return validationFilters;
	}

	/**
	* {@inheritDoc}
	*/
	@Override
	public void dispose() {
	workspace.eAdapters().remove(workspaceListenerAdapter);
	if (labelProvider != null) {
	labelProvider.dispose();
	}
	super.dispose();
	}

	/**
	* Starts refactoring.
	*/
	private void startRefactoring() {
	IStatus constraintStatus = (IStatus) tableItem.getData();
	List<?> abstractRefactoringStrategies = getRefactoringStrategiesFromExtensionPoint(constraintStatus);
	if (abstractRefactoringStrategies.isEmpty()) {
	return;
	}
	RefactoringResult refactoringResult = RefactoringResult.ABORT;
	if (abstractRefactoringStrategies.size() == 1) {
	RefactoringStrategy refactoringStrategy = (RefactoringStrategy) abstractRefactoringStrategies.get(0);
	refactoringStrategy.setShell(shell);
	refactoringResult = refactoringStrategy.startRefactoring();
	} else {
	// otherwise show list dialog
	ListDialog listDialog = new ListDialog(shell);
	listDialog.setInput(abstractRefactoringStrategies);
	listDialog.setLabelProvider(new RefactoringStrategyLabelProvider());
	listDialog.setContentProvider(new SimpleContentProvider());
	listDialog.setTitle("Choose a refactoring strategy");
	listDialog.open();
	Object[] result = listDialog.getResult();
	if (result != null && result.length > 0) {
	RefactoringStrategy refactoringStrategy = (RefactoringStrategy) result[0];
	refactoringStrategy.setShell(shell);
	refactoringResult = refactoringStrategy.startRefactoring();
	}
	}
	if (refactoringResult == RefactoringResult.NO_VIOLATION
	\|\| refactoringResult == RefactoringResult.SUCCESS_CREATE) {
	tableItem.dispose();
	}
	}

	/**
	* Empty the table from the view.
	*
	* @param status
	*/
	private void removeAllTableItemsForEObject(final IStatus status) {
	BasicDiagnostic inputElement1 = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(status);
	EObject deletee = (EObject) inputElement1.getData().get(0);
	for (TableItem tableItem : tableViewer.getTable().getItems()) {
	IStatus constraintStatus = (IStatus) tableItem.getData();
	BasicDiagnostic inputElement2 = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(constraintStatus);
	EObject modelElement = (EObject) inputElement2.getData().get(0);
	if (deletee == modelElement) {
	tableItem.dispose();
	}
	}
	}

	/**
	* Context menu listener.
	*/
	private final class MenuDetectListenerImplementation implements MenuDetectListener {

	public void menuDetected(MenuDetectEvent e) {
	// get the table
	Table table = (Table) e.getSource();
	if (table.getSelection() == null \|\| table.getSelection().length == 0) {
	return;
	}
	// get the first table item that was selected (no multiple select)
	tableItem = table.getSelection()[0];
	// extract the violation status
	final IStatus status = (IStatus) tableItem.getData();
	// create the menu
	Menu leftClickMenu = new Menu(shell, SWT.POP_UP);
	// add refactoring menu item if refactoring strategies are available
	List<RefactoringStrategy> refactoringStrategies = getRefactoringStrategiesFromExtensionPoint(status);
	if (refactoringStrategies.size() != 0) {
	final MenuItem refactorMenuItem = new MenuItem(leftClickMenu, SWT.NONE);
	// add the menu item
	refactorMenuItem.setData(tableItem);
	refactorMenuItem.setText("Perform refactoring");
	refactorMenuItem.setImage(Activator.getImageDescriptor("icons/bell.png").createImage());
	// refactorMenuItem.setData(data)
	refactorMenuItem.addSelectionListener(new RefactoringSelectionListener());
	}
	// // ignore constraint menu item
	// MenuItem ignoreMenuItem = new MenuItem(leftClickMenu, SWT.NONE);
	// ignoreMenuItem.setData(refactoringStrategies);
	// ignoreMenuItem.setText("Ignore violation");
	// ignoreMenuItem.setImage(Activator.getImageDescriptor(
	// "icons/bell_delete.png").createImage());
	// delete model element menu item
	MenuItem deleteMenuItem = new MenuItem(leftClickMenu, SWT.NONE);
	deleteMenuItem.setData(refactoringStrategies);
	deleteMenuItem.setText("Delete underlying element");
	deleteMenuItem.setImage(Activator.getImageDescriptor("icons/delete.png").createImage());
	deleteMenuItem.addSelectionListener(new SelectionAdapter() {

	@Override
	public void widgetSelected(SelectionEvent e) {
	BasicDiagnostic inputElement = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(status);
	EObject target = (EObject) inputElement.getData().get(0);
	if (MessageDialog.openQuestion(shell, "Confirm deletion", "Do you really wish to delete "
	+ target.getClass().getSimpleName() + "?")) {
	new ECPCommand(target) {

	@Override
	protected void doRun() {
	BasicDiagnostic inputElement = (BasicDiagnostic) BasicDiagnostic.toDiagnostic(status);
	EObject target = (EObject) inputElement.getData().get(0);
	EcoreUtil.delete(target);
	}
	}.run(false);
	}
	removeAllTableItemsForEObject(status);
	}
	});
	// set menu to visible
	leftClickMenu.setVisible(true);
	}

	/**
	* Refactoring selection listener.
	*/
	private final class RefactoringSelectionListener implements SelectionListener {
	public void widgetSelected(SelectionEvent e) {
	// only show selection dialog if there is more than one
	// refactoring
	startRefactoring();
	}

	public void widgetDefaultSelected(SelectionEvent e) {
	// nothing to do here
	}
	}
	}

	/**
	* The filter dialog action.
	*
	*/
	private final class OpenFilterDialogAction extends Action {

	@Override
	public void run() {
	ValidationFilterList validationFilterList = new ValidationFilterList(shell, getFiltersFromExtensionPoint(),
	new SimpleContentProvider(), new ValidationFilterLabelProvider(), "Test");
	validationFilterList.setTitle("Choose one or more filters");
	validationFilterList.setInitialSelections(tableViewer.getFilters());
	validationFilterList.open();
	if (validationFilterList.getReturnCode() == IStatus.OK) {
	removeAllFilters();
	for (Object object : validationFilterList.getResult()) {
	if (object instanceof ValidationFilter) {
	ValidationFilter validationFilter = (ValidationFilter) object;
	applyFilter(validationFilter);
	}
	}
	}
	}

	private void applyFilter(ValidationFilter validationFilter) {
	tableViewer.addFilter(validationFilter);
	}

	private void removeAllFilters() {
	tableViewer.resetFilters();
	}
	}

	/**
	* Label provider for a refactoring strategy.
	*/
	private final class RefactoringStrategyLabelProvider extends LabelProvider {

	@Override
	public Image getImage(Object element) {
	return Activator.getImageDescriptor("icons/bell.png").createImage();
	}

	@Override
	public String getText(Object element) {
	return ((RefactoringStrategy) ((Object[]) element)[0]).getDescription();
	}
	}

	/**
	* Simple structured content provider for lists.
	*/
	private final class SimpleContentProvider implements IStructuredContentProvider {

	public Object[] getElements(Object inputElement) {
	List<?> list = (List<?>) inputElement;
	if (list.isEmpty()) {
	return new Object[0];
	}
	return list.toArray();
	}

	public void dispose() {

	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

	}
	}

	}