plugins/org.eclipse.epsilon.emc.emf.dt/src/org/eclipse/epsilon/emc/emf/dt/EmfModelConfigurationDialog.java - epsilon/org.eclipse.epsilon - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008-2012 The University of York, Antonio García-Domínguez.
  * 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:
  *     Dimitrios Kolovos - initial API and implementation
  *     Antonio García-Domínguez - allow loading more than one metamodel
  ******************************************************************************/
 package org.eclipse.epsilon.emc.emf.dt;

 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;

 import org.eclipse.emf.common.util.URI;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.EPackage;
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.emf.ecore.resource.ResourceSet;
 import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
 import org.eclipse.emf.ecore.util.EcoreUtil;
 import org.eclipse.epsilon.common.dt.launching.dialogs.AbstractCachedModelConfigurationDialog;
 import org.eclipse.epsilon.common.dt.launching.dialogs.BrowseWorkspaceUtil;
 import org.eclipse.epsilon.emc.emf.EmfModel;
 import org.eclipse.epsilon.emc.emf.EmfUtil;
 import org.eclipse.epsilon.emf.dt.BrowseEPackagesListener;
 import org.eclipse.jface.viewers.ArrayContentProvider;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.ILabelProviderListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;

 public class EmfModelConfigurationDialog extends AbstractCachedModelConfigurationDialog {

 	private static final class MetamodelListLabelProvider implements ILabelProvider {
 		private Image imgFile, imgURI;

 		public MetamodelListLabelProvider() {
 			imgFile = Activator.getDefault().getImageDescriptor("icons/ecorefile.gif").createImage();
 			imgURI = Activator.getDefault().getImageDescriptor("icons/epackage.png").createImage();
 		}

 		@Override
 		public void addListener(ILabelProviderListener listener) {
 			// we don't need any listeners (cells are only added or removed, not edited)
 		}

 		@Override
 		public void dispose() {
 			imgFile.dispose();
 			imgURI.dispose();
 		}

 		@Override
 		public boolean isLabelProperty(Object element, String property) {
 			return false;
 		}

 		@Override
 		public void removeListener(ILabelProviderListener listener) {
 			// we don't need any listeners (cells are only added or removed, not edited)
 		}

 		@Override
 		public Image getImage(Object element) {
 			if (element instanceof String) {
 				return imgFile;
 			}
 			else if (element instanceof URI) {
 				return imgURI;
 			}
 			return null;
 		}

 		@Override
 		public String getText(Object element) {
 			return element + "";
 		}
 	}

 	@SuppressWarnings("deprecation")
 	private static final String PROPERTY_IS_METAMODEL_FILE_BASED = EmfModel.PROPERTY_IS_METAMODEL_FILE_BASED;

 	/**
 	 * Key used to store the raw (i.e. unqualified URI) model file value.
 	 */
 	// The deprecated property is used for backwards-compatibility with legacy launch configurations. See #341481.
 	@SuppressWarnings("deprecation")
 	private final static String PROPERTY_MODEL_FILE     = EmfModel.PROPERTY_MODEL_FILE;

 	/**
 	 * Key used to store the raw (i.e. unqualified URI) metamodel file value.
 	 */
 	// The deprecated property is used for backwards-compatibility with legacy launch configurations. See #341481.
 	@SuppressWarnings("deprecation")
 	private final static String PROPERTY_METAMODEL_FILE = EmfModel.PROPERTY_METAMODEL_FILE;

 	protected Button expandButton;
 	private Text modelFileText;
 	private TableViewer metamodelList;

 	// May contain metamodel URIs (as URI objects) or String (file-based metamodel paths) objects
 	private List<Object> metamodels = new ArrayList<Object>();

 	private Button reuseUnmodifiedFileBasedMetamodelsButton;

 	@Override
 	protected String getModelName() {
 		return "EMF model";
 	}

 	@Override
 	protected void createGroups(Composite control) {
 		super.createGroups(control);
 		createEmfGroup(control);
 		createFilesGroup(control);
 		createLoadStoreOptionsGroup(control);
 	}

 	@Override
 	protected String getModelType() {
 		return "EMF";
 	}

 	@Override
 	protected void loadProperties(){
 		super.loadProperties();
 		if (properties == null) return;

 		metamodels.clear();

 		// Restore values from legacy launch configuration
 		modelFileText.setText(properties.getProperty(PROPERTY_MODEL_FILE));
 		final String sLegacyFileMetamodels = properties.getProperty(PROPERTY_METAMODEL_FILE);
 		for (String sPath : sLegacyFileMetamodels.trim().split("\\s*,\\s*")) {
 			if (sPath.length() > 0) {
 				metamodels.add(sPath);
 			}
 		}

 		// Restore values that are used directly to construct an instance of EmfModel
 		final String sURIMetamodels = properties.getProperty(EmfModel.PROPERTY_METAMODEL_URI);
 		for (String sURI : sURIMetamodels.trim().split("\\s*,\\s*")) {
 			if (sURI.length() > 0) {
 				metamodels.add(URI.createURI(sURI));
 			}
 		}
 		expandButton.setSelection(new Boolean(properties.getProperty(EmfModel.PROPERTY_EXPAND)).booleanValue());

 		metamodelList.refresh();
 	}

 	@Override
 	protected void storeProperties(){
 		super.storeProperties();

 		/*
 		 * Compute comma-separated lists with the file paths and URIs. If we
 		 * only have one metamodel (either file- or URI-based), it should be
 		 * compatible with previous versions of Epsilon.
 		 */
 		final StringBuilder sbFileMetamodels = new StringBuilder();
 		final StringBuilder sbFileMetamodelURIs = new StringBuilder();
 		final StringBuilder sbURIMetamodels = new StringBuilder();
 		boolean bFirstFileMetamodel = true, bFirstURIMetamodel = true;
 		for (Object o : metamodels) {
 			if (o instanceof String) {
 				if (!bFirstFileMetamodel) {
 					sbFileMetamodelURIs.append(',');
 					sbFileMetamodels.append(',');
 				}
 				else {
 					bFirstFileMetamodel = false;
 				}
 				sbFileMetamodels.append((String)o);
 				sbFileMetamodelURIs.append(createFullyQualifiedUri((String)o));
 			}
 			else if (o instanceof URI) {
 				if (!bFirstURIMetamodel) {
 					sbURIMetamodels.append(',');
 				}
 				else {
 					bFirstURIMetamodel = false;
 				}
 				sbURIMetamodels.append(o.toString());
 			}
 		}
 		properties.put(PROPERTY_MODEL_FILE,     modelFileText.getText());
 		properties.put(PROPERTY_METAMODEL_FILE, sbFileMetamodels.toString());

 		// Persist values that are used directly to construct an instance of EmfModel (legacy - only one metamodel was supported)
 		properties.put(EmfModel.PROPERTY_METAMODEL_URI, sbURIMetamodels.toString());
 		properties.put(EmfModel.PROPERTY_EXPAND, expandButton.getSelection() + "");
 		properties.put(PROPERTY_IS_METAMODEL_FILE_BASED, "".equals(sbURIMetamodels.toString()));

 		// Create and persist URI values that are needed to construct an instance of EmfModel
 		properties.put(EmfModel.PROPERTY_MODEL_URI, createFullyQualifiedUri(modelFileText.getText()));
 		properties.put(EmfModel.PROPERTY_FILE_BASED_METAMODEL_URI, sbFileMetamodelURIs.toString());
 		properties.put(EmfModel.PROPERTY_REUSE_UNMODIFIED_FILE_BASED_METAMODELS, reuseUnmodifiedFileBasedMetamodelsButton.getSelection() + "");
 	}

 	protected void createEmfGroup(Composite parent) {
 		final Composite groupContent = createGroupContainer(parent, "EMF", 3);

 		expandButton = new Button(groupContent, SWT.CHECK);
 		expandButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		expandButton.setText("Include external references");
 		expandButton.setSelection(true);

 		GridData expandButtonData = new GridData();
 		expandButtonData.horizontalSpan = 2;
 		expandButton.setLayoutData(expandButtonData);

 		reuseUnmodifiedFileBasedMetamodelsButton = new Button(groupContent, SWT.CHECK);
 		reuseUnmodifiedFileBasedMetamodelsButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		reuseUnmodifiedFileBasedMetamodelsButton.setText("Reuse unmodified file-based metamodels");
 		reuseUnmodifiedFileBasedMetamodelsButton.setSelection(true);

 		GridData reuseUnmodifiedFileBasedMetamodelsButtonData = new GridData();
 		reuseUnmodifiedFileBasedMetamodelsButtonData.horizontalSpan = 2;
 		reuseUnmodifiedFileBasedMetamodelsButton.setLayoutData(reuseUnmodifiedFileBasedMetamodelsButtonData);

 		groupContent.layout();
 		groupContent.pack();
 	}

 	protected Composite createFilesGroup(Composite parent) {
 		final Composite groupContent = createGroupContainer(parent, "Files/URIs", 3);
 		((GridData)groupContent.getParent().getLayoutData()).grabExcessVerticalSpace = true;

 		final Label modelFileLabel = new Label(groupContent, SWT.NONE);
 		modelFileLabel.setText("Model file: ");

 		modelFileText = new Text(groupContent, SWT.BORDER);
 		modelFileText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		final Button browseModelFile = new Button(groupContent, SWT.NONE);
 		browseModelFile.setText("Browse Workspace...");
 		browseModelFile.addListener(SWT.Selection,
 			new BrowseWorkspaceForModelsListener(modelFileText, "EMF models in the workspace", "Select an EMF model") {
 			@Override
 			public void handleEvent(Event event) {
 				super.handleEvent(event);
 				Collection<EPackage> ePackages = findEPackages(modelFileText.getText());
 				if (ePackages.size() > 0) {
 					for (EPackage ePkg : ePackages) {
 						final URI uri = URI.createURI(ePkg.getNsURI());
 						if (!metamodels.contains(uri)) {
 							metamodels.add(uri);
 						}
 					}
 					metamodelList.refresh();
 				}
 			}
 		});

 		final Label metamodelListLabel = new Label(groupContent, SWT.LEFT | SWT.TOP);
 		final GridData metamodelListLabelLayout = new GridData(SWT.LEFT, SWT.TOP, false, false);
 		metamodelListLabelLayout.verticalIndent = 4;
 		metamodelListLabel.setLayoutData(metamodelListLabelLayout);
 		metamodelListLabel.setText("Metamodels:");

 		metamodelList = new TableViewer(groupContent);
 		metamodelList.setContentProvider(ArrayContentProvider.getInstance());
 		metamodelList.setInput(metamodels);
 		metamodelList.setLabelProvider(new MetamodelListLabelProvider());
 		GridData metamodelListLayout = new GridData(SWT.FILL, SWT.FILL, true, true);
 		metamodelList.getControl().setLayoutData(metamodelListLayout);

 		final Composite metamodelButtons = new Composite(groupContent, SWT.NONE);
 		final GridData metamodelButtonsLayout = new GridData();
 		metamodelButtonsLayout.horizontalAlignment = SWT.FILL;
 		metamodelButtons.setLayoutData(metamodelButtonsLayout);
 		metamodelButtons.setLayout(new FillLayout(SWT.VERTICAL));
 		final Button addFileMetamodelButton = new Button(metamodelButtons, SWT.NONE);
 		addFileMetamodelButton.setText("Add file...");
 		addFileMetamodelButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				final String path = BrowseWorkspaceUtil.browseFilePath(getShell(),
 						"EMF meta-models in the workspace",
 						"Select an EMF meta-model (Ecore or Xcore)",
 			            "?core<", null);
 				if (path != null && !metamodels.contains(path)) {
 					metamodels.add(path);
 					metamodelList.refresh();
 				}
 			}
 		});

 		final Button addURIMetamodelButton = new Button(metamodelButtons, SWT.NONE);
 		addURIMetamodelButton.setText("Add URI...");
 		addURIMetamodelButton.addListener(SWT.Selection, new BrowseEPackagesListener() {
 			@Override
 			public void selectionChanged(String ePackageUri) {
 				URI uri = URI.createURI(ePackageUri);
 				if (!metamodels.contains(uri)) {
 					metamodels.add(uri);
 					metamodelList.refresh();
 				}
 			}
 		});

 		final Button removeMetamodelButton = new Button(metamodelButtons, SWT.NONE);
 		removeMetamodelButton.setText("Remove");
 		removeMetamodelButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				if (metamodelList.getSelection() instanceof IStructuredSelection) {
 					final IStructuredSelection sel = (IStructuredSelection)metamodelList.getSelection();
 					for (Iterator<?> it = sel.iterator(); it.hasNext(); ) {
 						metamodels.remove(it.next());
 					}
 					metamodelList.refresh();
 				}
 			}
 		});

 		final Button clearAllMetamodelsButton = new Button(metamodelButtons, SWT.NONE);
 		clearAllMetamodelsButton.setText("Clear");
 		clearAllMetamodelsButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				metamodels.clear();
 				metamodelList.refresh();
 			}
 		});

 		groupContent.layout();
 		groupContent.pack();
 		return groupContent;
 	}

 	private String createFullyQualifiedUri(String relativePath) {
 		if (relativePath == null || relativePath.isEmpty())
 			return "";
 		else
 			return EmfUtil.createPlatformResourceURI(relativePath).toString();
 	}

 	private Collection<EPackage> findEPackages(String resourcePath) {
 		Set<EPackage> ePackages = new HashSet<EPackage>();

 		// Reuse EmfRegistryManager Approach
 		try {
 		    if (resourcePath.endsWith(".ecore")) {
 		        ePackages.addAll(EmfUtil.register(URI.createPlatformResourceURI(resourcePath, true), EPackage.Registry.INSTANCE));
 		    }
 		    else {    // Must be xcore
 		        ePackages.addAll(EmfUtil.registerXcore(URI.createPlatformResourceURI(resourcePath, true), EPackage.Registry.INSTANCE));
 		    }
 		}
 		catch (Exception ex) {
 			ex.printStackTrace();
 		}
 		return ePackages;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2008-2012 The University of York, Antonio García-Domínguez.
	* 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:
	* Dimitrios Kolovos - initial API and implementation
	* Antonio García-Domínguez - allow loading more than one metamodel
	******************************************************************************/
	package org.eclipse.epsilon.emc.emf.dt;

	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.HashSet;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Set;

	import org.eclipse.emf.common.util.URI;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.EPackage;
	import org.eclipse.emf.ecore.resource.Resource;
	import org.eclipse.emf.ecore.resource.ResourceSet;
	import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
	import org.eclipse.emf.ecore.util.EcoreUtil;
	import org.eclipse.epsilon.common.dt.launching.dialogs.AbstractCachedModelConfigurationDialog;
	import org.eclipse.epsilon.common.dt.launching.dialogs.BrowseWorkspaceUtil;
	import org.eclipse.epsilon.emc.emf.EmfModel;
	import org.eclipse.epsilon.emc.emf.EmfUtil;
	import org.eclipse.epsilon.emf.dt.BrowseEPackagesListener;
	import org.eclipse.jface.viewers.ArrayContentProvider;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.ILabelProviderListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.FillLayout;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;

	public class EmfModelConfigurationDialog extends AbstractCachedModelConfigurationDialog {

	private static final class MetamodelListLabelProvider implements ILabelProvider {
	private Image imgFile, imgURI;

	public MetamodelListLabelProvider() {
	imgFile = Activator.getDefault().getImageDescriptor("icons/ecorefile.gif").createImage();
	imgURI = Activator.getDefault().getImageDescriptor("icons/epackage.png").createImage();
	}

	@Override
	public void addListener(ILabelProviderListener listener) {
	// we don't need any listeners (cells are only added or removed, not edited)
	}

	@Override
	public void dispose() {
	imgFile.dispose();
	imgURI.dispose();
	}

	@Override
	public boolean isLabelProperty(Object element, String property) {
	return false;
	}

	@Override
	public void removeListener(ILabelProviderListener listener) {
	// we don't need any listeners (cells are only added or removed, not edited)
	}

	@Override
	public Image getImage(Object element) {
	if (element instanceof String) {
	return imgFile;
	}
	else if (element instanceof URI) {
	return imgURI;
	}
	return null;
	}

	@Override
	public String getText(Object element) {
	return element + "";
	}
	}

	@SuppressWarnings("deprecation")
	private static final String PROPERTY_IS_METAMODEL_FILE_BASED = EmfModel.PROPERTY_IS_METAMODEL_FILE_BASED;

	/**
	* Key used to store the raw (i.e. unqualified URI) model file value.
	*/
	// The deprecated property is used for backwards-compatibility with legacy launch configurations. See #341481.
	@SuppressWarnings("deprecation")
	private final static String PROPERTY_MODEL_FILE = EmfModel.PROPERTY_MODEL_FILE;

	/**
	* Key used to store the raw (i.e. unqualified URI) metamodel file value.
	*/
	// The deprecated property is used for backwards-compatibility with legacy launch configurations. See #341481.
	@SuppressWarnings("deprecation")
	private final static String PROPERTY_METAMODEL_FILE = EmfModel.PROPERTY_METAMODEL_FILE;

	protected Button expandButton;
	private Text modelFileText;
	private TableViewer metamodelList;

	// May contain metamodel URIs (as URI objects) or String (file-based metamodel paths) objects
	private List<Object> metamodels = new ArrayList<Object>();

	private Button reuseUnmodifiedFileBasedMetamodelsButton;

	@Override
	protected String getModelName() {
	return "EMF model";
	}

	@Override
	protected void createGroups(Composite control) {
	super.createGroups(control);
	createEmfGroup(control);
	createFilesGroup(control);
	createLoadStoreOptionsGroup(control);
	}

	@Override
	protected String getModelType() {
	return "EMF";
	}

	@Override
	protected void loadProperties(){
	super.loadProperties();
	if (properties == null) return;

	metamodels.clear();

	// Restore values from legacy launch configuration
	modelFileText.setText(properties.getProperty(PROPERTY_MODEL_FILE));
	final String sLegacyFileMetamodels = properties.getProperty(PROPERTY_METAMODEL_FILE);
	for (String sPath : sLegacyFileMetamodels.trim().split("\\s,\\s")) {
	if (sPath.length() > 0) {
	metamodels.add(sPath);
	}
	}

	// Restore values that are used directly to construct an instance of EmfModel
	final String sURIMetamodels = properties.getProperty(EmfModel.PROPERTY_METAMODEL_URI);
	for (String sURI : sURIMetamodels.trim().split("\\s,\\s")) {
	if (sURI.length() > 0) {
	metamodels.add(URI.createURI(sURI));
	}
	}
	expandButton.setSelection(new Boolean(properties.getProperty(EmfModel.PROPERTY_EXPAND)).booleanValue());

	metamodelList.refresh();
	}

	@Override
	protected void storeProperties(){
	super.storeProperties();

	/*
	* Compute comma-separated lists with the file paths and URIs. If we
	* only have one metamodel (either file- or URI-based), it should be
	* compatible with previous versions of Epsilon.
	*/
	final StringBuilder sbFileMetamodels = new StringBuilder();
	final StringBuilder sbFileMetamodelURIs = new StringBuilder();
	final StringBuilder sbURIMetamodels = new StringBuilder();
	boolean bFirstFileMetamodel = true, bFirstURIMetamodel = true;
	for (Object o : metamodels) {
	if (o instanceof String) {
	if (!bFirstFileMetamodel) {
	sbFileMetamodelURIs.append(',');
	sbFileMetamodels.append(',');
	}
	else {
	bFirstFileMetamodel = false;
	}
	sbFileMetamodels.append((String)o);
	sbFileMetamodelURIs.append(createFullyQualifiedUri((String)o));
	}
	else if (o instanceof URI) {
	if (!bFirstURIMetamodel) {
	sbURIMetamodels.append(',');
	}
	else {
	bFirstURIMetamodel = false;
	}
	sbURIMetamodels.append(o.toString());
	}
	}
	properties.put(PROPERTY_MODEL_FILE, modelFileText.getText());
	properties.put(PROPERTY_METAMODEL_FILE, sbFileMetamodels.toString());

	// Persist values that are used directly to construct an instance of EmfModel (legacy - only one metamodel was supported)
	properties.put(EmfModel.PROPERTY_METAMODEL_URI, sbURIMetamodels.toString());
	properties.put(EmfModel.PROPERTY_EXPAND, expandButton.getSelection() + "");
	properties.put(PROPERTY_IS_METAMODEL_FILE_BASED, "".equals(sbURIMetamodels.toString()));

	// Create and persist URI values that are needed to construct an instance of EmfModel
	properties.put(EmfModel.PROPERTY_MODEL_URI, createFullyQualifiedUri(modelFileText.getText()));
	properties.put(EmfModel.PROPERTY_FILE_BASED_METAMODEL_URI, sbFileMetamodelURIs.toString());
	properties.put(EmfModel.PROPERTY_REUSE_UNMODIFIED_FILE_BASED_METAMODELS, reuseUnmodifiedFileBasedMetamodelsButton.getSelection() + "");
	}

	protected void createEmfGroup(Composite parent) {
	final Composite groupContent = createGroupContainer(parent, "EMF", 3);

	expandButton = new Button(groupContent, SWT.CHECK);
	expandButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	expandButton.setText("Include external references");
	expandButton.setSelection(true);

	GridData expandButtonData = new GridData();
	expandButtonData.horizontalSpan = 2;
	expandButton.setLayoutData(expandButtonData);

	reuseUnmodifiedFileBasedMetamodelsButton = new Button(groupContent, SWT.CHECK);
	reuseUnmodifiedFileBasedMetamodelsButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	reuseUnmodifiedFileBasedMetamodelsButton.setText("Reuse unmodified file-based metamodels");
	reuseUnmodifiedFileBasedMetamodelsButton.setSelection(true);

	GridData reuseUnmodifiedFileBasedMetamodelsButtonData = new GridData();
	reuseUnmodifiedFileBasedMetamodelsButtonData.horizontalSpan = 2;
	reuseUnmodifiedFileBasedMetamodelsButton.setLayoutData(reuseUnmodifiedFileBasedMetamodelsButtonData);

	groupContent.layout();
	groupContent.pack();
	}

	protected Composite createFilesGroup(Composite parent) {
	final Composite groupContent = createGroupContainer(parent, "Files/URIs", 3);
	((GridData)groupContent.getParent().getLayoutData()).grabExcessVerticalSpace = true;

	final Label modelFileLabel = new Label(groupContent, SWT.NONE);
	modelFileLabel.setText("Model file: ");

	modelFileText = new Text(groupContent, SWT.BORDER);
	modelFileText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	final Button browseModelFile = new Button(groupContent, SWT.NONE);
	browseModelFile.setText("Browse Workspace...");
	browseModelFile.addListener(SWT.Selection,
	new BrowseWorkspaceForModelsListener(modelFileText, "EMF models in the workspace", "Select an EMF model") {
	@Override
	public void handleEvent(Event event) {
	super.handleEvent(event);
	Collection<EPackage> ePackages = findEPackages(modelFileText.getText());
	if (ePackages.size() > 0) {
	for (EPackage ePkg : ePackages) {
	final URI uri = URI.createURI(ePkg.getNsURI());
	if (!metamodels.contains(uri)) {
	metamodels.add(uri);
	}
	}
	metamodelList.refresh();
	}
	}
	});

	final Label metamodelListLabel = new Label(groupContent, SWT.LEFT \| SWT.TOP);
	final GridData metamodelListLabelLayout = new GridData(SWT.LEFT, SWT.TOP, false, false);
	metamodelListLabelLayout.verticalIndent = 4;
	metamodelListLabel.setLayoutData(metamodelListLabelLayout);
	metamodelListLabel.setText("Metamodels:");

	metamodelList = new TableViewer(groupContent);
	metamodelList.setContentProvider(ArrayContentProvider.getInstance());
	metamodelList.setInput(metamodels);
	metamodelList.setLabelProvider(new MetamodelListLabelProvider());
	GridData metamodelListLayout = new GridData(SWT.FILL, SWT.FILL, true, true);
	metamodelList.getControl().setLayoutData(metamodelListLayout);

	final Composite metamodelButtons = new Composite(groupContent, SWT.NONE);
	final GridData metamodelButtonsLayout = new GridData();
	metamodelButtonsLayout.horizontalAlignment = SWT.FILL;
	metamodelButtons.setLayoutData(metamodelButtonsLayout);
	metamodelButtons.setLayout(new FillLayout(SWT.VERTICAL));
	final Button addFileMetamodelButton = new Button(metamodelButtons, SWT.NONE);
	addFileMetamodelButton.setText("Add file...");
	addFileMetamodelButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	final String path = BrowseWorkspaceUtil.browseFilePath(getShell(),
	"EMF meta-models in the workspace",
	"Select an EMF meta-model (Ecore or Xcore)",
	"?core<", null);
	if (path != null && !metamodels.contains(path)) {
	metamodels.add(path);
	metamodelList.refresh();
	}
	}
	});

	final Button addURIMetamodelButton = new Button(metamodelButtons, SWT.NONE);
	addURIMetamodelButton.setText("Add URI...");
	addURIMetamodelButton.addListener(SWT.Selection, new BrowseEPackagesListener() {
	@Override
	public void selectionChanged(String ePackageUri) {
	URI uri = URI.createURI(ePackageUri);
	if (!metamodels.contains(uri)) {
	metamodels.add(uri);
	metamodelList.refresh();
	}
	}
	});

	final Button removeMetamodelButton = new Button(metamodelButtons, SWT.NONE);
	removeMetamodelButton.setText("Remove");
	removeMetamodelButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	if (metamodelList.getSelection() instanceof IStructuredSelection) {
	final IStructuredSelection sel = (IStructuredSelection)metamodelList.getSelection();
	for (Iterator<?> it = sel.iterator(); it.hasNext(); ) {
	metamodels.remove(it.next());
	}
	metamodelList.refresh();
	}
	}
	});

	final Button clearAllMetamodelsButton = new Button(metamodelButtons, SWT.NONE);
	clearAllMetamodelsButton.setText("Clear");
	clearAllMetamodelsButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	metamodels.clear();
	metamodelList.refresh();
	}
	});

	groupContent.layout();
	groupContent.pack();
	return groupContent;
	}

	private String createFullyQualifiedUri(String relativePath) {
	if (relativePath == null \|\| relativePath.isEmpty())
	return "";
	else
	return EmfUtil.createPlatformResourceURI(relativePath).toString();
	}

	private Collection<EPackage> findEPackages(String resourcePath) {
	Set<EPackage> ePackages = new HashSet<EPackage>();

	// Reuse EmfRegistryManager Approach
	try {
	if (resourcePath.endsWith(".ecore")) {
	ePackages.addAll(EmfUtil.register(URI.createPlatformResourceURI(resourcePath, true), EPackage.Registry.INSTANCE));
	}
	else { // Must be xcore
	ePackages.addAll(EmfUtil.registerXcore(URI.createPlatformResourceURI(resourcePath, true), EPackage.Registry.INSTANCE));
	}
	}
	catch (Exception ex) {
	ex.printStackTrace();
	}
	return ePackages;
	}

	}