/*******************************************************************************
 * Copyright (c) 2011, 2013 Formal Mind GmbH and University of Dusseldorf.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Michael Jastram - initial API and implementation
 ******************************************************************************/

package org.eclipse.rmf.reqif10.pror.editor.presentation;


import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.StringTokenizer;
import java.util.UUID;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.emf.common.CommonPlugin;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.emf.edit.ui.provider.ExtendedImageRegistry;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.rmf.reqif10.AttributeDefinitionString;
import org.eclipse.rmf.reqif10.AttributeValueString;
import org.eclipse.rmf.reqif10.DatatypeDefinitionString;
import org.eclipse.rmf.reqif10.ReqIF;
import org.eclipse.rmf.reqif10.ReqIF10Factory;
import org.eclipse.rmf.reqif10.ReqIF10Package;
import org.eclipse.rmf.reqif10.ReqIFContent;
import org.eclipse.rmf.reqif10.ReqIFHeader;
import org.eclipse.rmf.reqif10.SpecHierarchy;
import org.eclipse.rmf.reqif10.SpecObject;
import org.eclipse.rmf.reqif10.SpecObjectType;
import org.eclipse.rmf.reqif10.Specification;
import org.eclipse.rmf.reqif10.SpecificationType;
import org.eclipse.rmf.reqif10.common.util.ReqIF10Util;
import org.eclipse.rmf.reqif10.common.util.ReqIFToolExtensionUtil;
import org.eclipse.rmf.reqif10.pror.configuration.Column;
import org.eclipse.rmf.reqif10.pror.configuration.ConfigurationFactory;
import org.eclipse.rmf.reqif10.pror.configuration.LabelConfiguration;
import org.eclipse.rmf.reqif10.pror.configuration.ProrGeneralConfiguration;
import org.eclipse.rmf.reqif10.pror.configuration.ProrSpecViewConfiguration;
import org.eclipse.rmf.reqif10.pror.configuration.ProrToolExtension;
import org.eclipse.rmf.reqif10.pror.provider.Reqif10EditPlugin;
import org.eclipse.rmf.reqif10.pror.util.ConfigurationUtil;
import org.eclipse.rmf.reqif10.serialization.ReqIF10ResourceFactoryImpl;
import org.eclipse.sphinx.emf.serialization.XMLPersistenceMappingResourceSetImpl;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.actions.WorkspaceModifyOperation;
import org.eclipse.ui.dialogs.WizardNewFileCreationPage;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.part.ISetSelectionTarget;


/**
 * This is a simple wizard for creating a new model file.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated
 */
public class Reqif10ModelWizard extends Wizard implements INewWizard {
	/**
	 * The supported extensions for created files.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final List<String> FILE_EXTENSIONS =
		Collections.unmodifiableList(Arrays.asList(Reqif10EditorPlugin.INSTANCE.getString("_UI_Reqif10EditorFilenameExtensions").split("\\s*,\\s*")));

	/**
	 * A formatted list of supported file extensions, suitable for display.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final String FORMATTED_FILE_EXTENSIONS =
		Reqif10EditorPlugin.INSTANCE.getString("_UI_Reqif10EditorFilenameExtensions").replaceAll("\\s*,\\s*", ", ");

	/**
	 * This caches an instance of the model package.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ReqIF10Package reqif10Package = ReqIF10Package.eINSTANCE;

	/**
	 * This caches an instance of the model factory.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ReqIF10Factory reqif10Factory = reqif10Package.getReqIF10Factory();

	/**
	 * This is the file creation page.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Reqif10ModelWizardNewFileCreationPage newFileCreationPage;

	/**
	 * This is the initial object creation page.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Reqif10ModelWizardInitialObjectCreationPage initialObjectCreationPage;

	/**
	 * Remember the selection during initialization for populating the default container.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IStructuredSelection selection;

	/**
	 * Remember the workbench during initialization.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IWorkbench workbench;

	/**
	 * Caches the names of the types that can be created as the root object.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected List<String> initialObjectNames;

	/**
	 * This just records the information.
	 * <!-- begin-user-doc -->
	 * Uses a custom Image for the Wizard.
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	public void init(IWorkbench workbench, IStructuredSelection selection) {
		this.workbench = workbench;
		this.selection = selection;
		setWindowTitle(Reqif10EditorPlugin.INSTANCE.getString("_UI_Wizard_label"));
		setDefaultPageImageDescriptor(ExtendedImageRegistry.INSTANCE.getImageDescriptor(Reqif10EditorPlugin.INSTANCE.getImage("full/wizban/NewReqif10.png")));
	}

	/**
	 * Returns the names of the types that can be created as the root object.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected Collection<String> getInitialObjectNames() {
		if (initialObjectNames == null) {
			initialObjectNames = new ArrayList<String>();
			for (EClassifier eClassifier : reqif10Package.getEClassifiers()) {
				if (eClassifier instanceof EClass) {
					EClass eClass = (EClass)eClassifier;
					if (!eClass.isAbstract()) {
						initialObjectNames.add(eClass.getName());
					}
				}
			}
			Collections.sort(initialObjectNames, CommonPlugin.INSTANCE.getComparator());
		}
		return initialObjectNames;
	}

	/**
	 * Create a new model.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected EObject createInitialModel() {
		ReqIF root = reqif10Factory.createReqIF();

		ReqIFHeader header = reqif10Factory.createReqIFHeader();
		root.setTheHeader(header);

		GregorianCalendar reqIFLastChange = ReqIF10Util.getReqIFLastChange();

		header.setCreationTime(reqIFLastChange);
		header.setSourceToolId("ProR (http://pror.org)");
		header.setIdentifier("rmf-" + UUID.randomUUID());
		header.setReqIFVersion("1.0");
		header.setReqIFToolId("ProR (http://pror.org)");
		header.setComment("Created by: " + System.getProperty("user.name"));

		ReqIFContent content = reqif10Factory.createReqIFContent();
		root.setCoreContent(content);

		// Add a DatatypeDefinition
		DatatypeDefinitionString ddString = reqif10Factory
				.createDatatypeDefinitionString();
		ddString.setLongName("T_String32k");
		ddString.setMaxLength(new BigInteger("32000"));
		ddString.setLastChange(reqIFLastChange);
		content.getDatatypes().add(ddString);

		// Add a SpecObjectType
		SpecObjectType specObjectType = reqif10Factory.createSpecObjectType();
		specObjectType.setLongName("Requirement Type");
		specObjectType.setLastChange(reqIFLastChange);
		content.getSpecTypes().add(specObjectType);

		// Add an AttributeDefinition
		AttributeDefinitionString ad1 = reqif10Factory
				.createAttributeDefinitionString();
		ad1.setType(ddString);
		ad1.setLongName("Description");
		ad1.setLastChange(reqIFLastChange);
		specObjectType.getSpecAttributes().add(ad1);

		// Add a SpecificationType
		SpecificationType specificationType = reqif10Factory.createSpecificationType();
		specificationType.setLongName("Specification Type");
		specificationType.setLastChange(reqIFLastChange);
		content.getSpecTypes().add(specificationType);

		// Add an AttributeDefinition
		AttributeDefinitionString ad2 = reqif10Factory
				.createAttributeDefinitionString();
		ad2.setType(ddString);
		ad2.setLongName("Description");
		ad2.setLastChange(reqIFLastChange);
		specificationType.getSpecAttributes().add(ad2);

		// Add a Specification
		Specification spec = reqif10Factory.createSpecification();
		spec.setLongName("Specification Document");
		spec.setType(specificationType);
		spec.setLastChange(reqIFLastChange);
		AttributeValueString value1 = reqif10Factory.createAttributeValueString();
		value1.setTheValue("Requirements Document");
		value1.setDefinition(ad2);
		spec.getValues().add(value1);

		content.getSpecifications().add(spec);

		// Configure the Specification View
		ProrToolExtension extension = ConfigurationFactory.eINSTANCE
				.createProrToolExtension();
		ReqIFToolExtensionUtil.addToolExtension(root, extension);
		ProrSpecViewConfiguration prorSpecViewConfiguration = ConfigurationFactory.eINSTANCE
				.createProrSpecViewConfiguration();
		extension.getSpecViewConfigurations().add(prorSpecViewConfiguration);
		prorSpecViewConfiguration.setSpecification(spec);
		Column col = ConfigurationFactory.eINSTANCE.createColumn();
		col.setLabel("Description");
		col.setWidth(400);
		prorSpecViewConfiguration.getColumns().add(col);

		Column leftHeaderColumn = ConfigurationFactory.eINSTANCE.createColumn();
		leftHeaderColumn
				.setWidth(ConfigurationUtil.DEFAULT_LEFT_HEADER_COLUMN_WIDTH);
		leftHeaderColumn
				.setLabel(ConfigurationUtil.DEFAULT_LEFT_HEADER_COLUMN_NAME);
		prorSpecViewConfiguration.setLeftHeaderColumn(leftHeaderColumn);

		// Configure the Label configuration
		ProrGeneralConfiguration generalConfig = ConfigurationFactory.eINSTANCE
				.createProrGeneralConfiguration();
		LabelConfiguration labelConfig = ConfigurationFactory.eINSTANCE
				.createLabelConfiguration();
		labelConfig.getDefaultLabel().add("Description");
		generalConfig.setLabelConfiguration(labelConfig);
		extension.setGeneralConfiguration(generalConfig);

		// Create one Requirement
		SpecObject specObject = reqif10Factory.createSpecObject();
		specObject.setType(specObjectType);
		specObject.setLastChange(reqIFLastChange);
		content.getSpecObjects().add(specObject);
		AttributeValueString value2 = reqif10Factory.createAttributeValueString();
		value2.setTheValue("Start editing here.");
		value2.setDefinition(ad1);
		specObject.getValues().add(value2);

		// Add the requirement to the Specification
		SpecHierarchy specHierarchy = reqif10Factory.createSpecHierarchy();
		specHierarchy.setLastChange(reqIFLastChange);
		spec.getChildren().add(specHierarchy);
		specHierarchy.setObject(specObject);
		return root;
	}

	/**
	 * Do the work after everything is specified.
	 * <!-- begin-user-doc -->
	 * Always use UTF-8 Encoding
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	@Override
	public boolean performFinish() {
		try {
			// Remember the file.
			//
			final IFile modelFile = getModelFile();

			// Do the work within an operation.
			//
			WorkspaceModifyOperation operation =
				new WorkspaceModifyOperation() {
					@Override
					protected void execute(IProgressMonitor progressMonitor) {
						try {
							// Create a resource set
							//
							XMLPersistenceMappingResourceSetImpl resourceSet = new XMLPersistenceMappingResourceSetImpl();

							// (mj) Sollte nicht notwendig sein, uebernommmen von Mark's Unit Test
							resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put("reqif", new ReqIF10ResourceFactoryImpl());
							resourceSet.getPackageRegistry().put(ReqIF10Package.eNS_URI, ReqIF10Package.eINSTANCE);

							// Get the URI of the model file.
							//
							URI fileURI = URI.createPlatformResourceURI(modelFile.getFullPath().toString(), true);

							// Create a resource for this file.
							//
							Resource resource = resourceSet.createResource(fileURI);

							// Add the initial model object to the contents.
							//
							EObject rootObject = createInitialModel();
							if (rootObject != null) {
								resource.getContents().add(rootObject);
							}

							// Save the contents of the resource to the file system.
							//
							Map<Object, Object> options = new HashMap<Object, Object>();
							// Always use UTF-8 encoding
							// options.put(XMLResource.OPTION_ENCODING,
							// initialObjectCreationPage.getEncoding());
							options.put(XMLResource.OPTION_ENCODING, "UTF-8");
							resource.save(null);
						}
						catch (Exception exception) {
							Reqif10EditorPlugin.INSTANCE.log(exception);
						}
						finally {
							progressMonitor.done();
						}
					}
				};

			getContainer().run(false, false, operation);

			// Select the new file resource in the current view.
			//
			IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();
			IWorkbenchPage page = workbenchWindow.getActivePage();
			final IWorkbenchPart activePart = page.getActivePart();
			if (activePart instanceof ISetSelectionTarget) {
				final ISelection targetSelection = new StructuredSelection(modelFile);
				getShell().getDisplay().asyncExec
					(new Runnable() {
						 public void run() {
							 ((ISetSelectionTarget)activePart).selectReveal(targetSelection);
						 }
					 });
			}

			// Open an editor on the new file.
			//
			try {
				page.openEditor
					(new FileEditorInput(modelFile),
					 workbench.getEditorRegistry().getDefaultEditor(modelFile.getFullPath().toString()).getId());					 	 
			}
			catch (PartInitException exception) {
				MessageDialog.openError(workbenchWindow.getShell(), Reqif10EditorPlugin.INSTANCE.getString("_UI_OpenEditorError_label"), exception.getMessage());
				return false;
			}

			return true;
		}
		catch (Exception exception) {
			Reqif10EditorPlugin.INSTANCE.log(exception);
			return false;
		}
	}

	/**
	 * This is the one page of the wizard.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public class Reqif10ModelWizardNewFileCreationPage extends WizardNewFileCreationPage {
		/**
		 * Pass in the selection.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public Reqif10ModelWizardNewFileCreationPage(String pageId, IStructuredSelection selection) {
			super(pageId, selection);
		}

		/**
		 * The framework calls this to see if the file is correct.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		@Override
		protected boolean validatePage() {
			if (super.validatePage()) {
				String extension = new Path(getFileName()).getFileExtension();
				if (extension == null || !FILE_EXTENSIONS.contains(extension)) {
					String key = FILE_EXTENSIONS.size() > 1 ? "_WARN_FilenameExtensions" : "_WARN_FilenameExtension";
					setErrorMessage(Reqif10EditorPlugin.INSTANCE.getString(key, new Object [] { FORMATTED_FILE_EXTENSIONS }));
					return false;
				}
				return true;
			}
			return false;
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public IFile getModelFile() {
			return ResourcesPlugin.getWorkspace().getRoot().getFile(getContainerFullPath().append(getFileName()));
		}
	}

	/**
	 * This is the page where the type of object to create is selected.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public class Reqif10ModelWizardInitialObjectCreationPage extends WizardPage {
		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		protected Combo initialObjectField;

		/**
		 * @generated
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 */
		protected List<String> encodings;

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		protected Combo encodingField;

		/**
		 * Pass in the selection.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public Reqif10ModelWizardInitialObjectCreationPage(String pageId) {
			super(pageId);
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public void createControl(Composite parent) {
			Composite composite = new Composite(parent, SWT.NONE);
			{
				GridLayout layout = new GridLayout();
				layout.numColumns = 1;
				layout.verticalSpacing = 12;
				composite.setLayout(layout);

				GridData data = new GridData();
				data.verticalAlignment = GridData.FILL;
				data.grabExcessVerticalSpace = true;
				data.horizontalAlignment = GridData.FILL;
				composite.setLayoutData(data);
			}

			Label containerLabel = new Label(composite, SWT.LEFT);
			{
				containerLabel.setText(Reqif10EditorPlugin.INSTANCE.getString("_UI_ModelObject"));

				GridData data = new GridData();
				data.horizontalAlignment = GridData.FILL;
				containerLabel.setLayoutData(data);
			}

			initialObjectField = new Combo(composite, SWT.BORDER);
			{
				GridData data = new GridData();
				data.horizontalAlignment = GridData.FILL;
				data.grabExcessHorizontalSpace = true;
				initialObjectField.setLayoutData(data);
			}

			for (String objectName : getInitialObjectNames()) {
				initialObjectField.add(getLabel(objectName));
			}

			if (initialObjectField.getItemCount() == 1) {
				initialObjectField.select(0);
			}
			initialObjectField.addModifyListener(validator);

			Label encodingLabel = new Label(composite, SWT.LEFT);
			{
				encodingLabel.setText(Reqif10EditorPlugin.INSTANCE.getString("_UI_XMLEncoding"));

				GridData data = new GridData();
				data.horizontalAlignment = GridData.FILL;
				encodingLabel.setLayoutData(data);
			}
			encodingField = new Combo(composite, SWT.BORDER);
			{
				GridData data = new GridData();
				data.horizontalAlignment = GridData.FILL;
				data.grabExcessHorizontalSpace = true;
				encodingField.setLayoutData(data);
			}

			for (String encoding : getEncodings()) {
				encodingField.add(encoding);
			}

			encodingField.select(0);
			encodingField.addModifyListener(validator);

			setPageComplete(validatePage());
			setControl(composite);
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		protected ModifyListener validator =
			new ModifyListener() {
				public void modifyText(ModifyEvent e) {
					setPageComplete(validatePage());
				}
			};

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		protected boolean validatePage() {
			return getInitialObjectName() != null && getEncodings().contains(encodingField.getText());
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		@Override
		public void setVisible(boolean visible) {
			super.setVisible(visible);
			if (visible) {
				if (initialObjectField.getItemCount() == 1) {
					initialObjectField.clearSelection();
					encodingField.setFocus();
				}
				else {
					encodingField.clearSelection();
					initialObjectField.setFocus();
				}
			}
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public String getInitialObjectName() {
			String label = initialObjectField.getText();

			for (String name : getInitialObjectNames()) {
				if (getLabel(name).equals(label)) {
					return name;
				}
			}
			return null;
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public String getEncoding() {
			return encodingField.getText();
		}

		/**
		 * Returns the label for the specified type name.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		protected String getLabel(String typeName) {
			try {
				return Reqif10EditPlugin.INSTANCE.getString("_UI_" + typeName + "_type");
			}
			catch(MissingResourceException mre) {
				Reqif10EditorPlugin.INSTANCE.log(mre);
			}
			return typeName;
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		protected Collection<String> getEncodings() {
			if (encodings == null) {
				encodings = new ArrayList<String>();
				for (StringTokenizer stringTokenizer = new StringTokenizer(Reqif10EditorPlugin.INSTANCE.getString("_UI_XMLEncodingChoices")); stringTokenizer.hasMoreTokens(); ) {
					encodings.add(stringTokenizer.nextToken());
				}
			}
			return encodings;
		}
	}

	/**
	 * The framework calls this to create the contents of the wizard.
	 * <!-- begin-user-doc -->
	 * We always use a {@link ReqIf} as the root.
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
		@Override
	public void addPages() {
		// Create a page, set the title, and the initial model file name.
		//
		newFileCreationPage = new Reqif10ModelWizardNewFileCreationPage("Whatever", selection);
		newFileCreationPage.setTitle(Reqif10EditorPlugin.INSTANCE.getString("_UI_Reqif10ModelWizard_label"));
		newFileCreationPage.setDescription(Reqif10EditorPlugin.INSTANCE.getString("_UI_Reqif10ModelWizard_description"));
		newFileCreationPage.setFileName(Reqif10EditorPlugin.INSTANCE.getString("_UI_Reqif10EditorFilenameDefaultBase") + "." + FILE_EXTENSIONS.get(0));
		addPage(newFileCreationPage);

		// Try and get the resource selection to determine a current directory for the file dialog.
		//
		if (selection != null && !selection.isEmpty()) {
			// Get the resource...
			//
			Object selectedElement = selection.iterator().next();
			if (selectedElement instanceof IResource) {
				// Get the resource parent, if its a file.
				//
				IResource selectedResource = (IResource)selectedElement;
				if (selectedResource.getType() == IResource.FILE) {
					selectedResource = selectedResource.getParent();
				}

				// This gives us a directory...
				//
				if (selectedResource instanceof IFolder || selectedResource instanceof IProject) {
					// Set this for the container.
					//
					newFileCreationPage.setContainerFullPath(selectedResource.getFullPath());

					// Make up a unique new name here.
					//
					String defaultModelBaseFilename = Reqif10EditorPlugin.INSTANCE.getString("_UI_Reqif10EditorFilenameDefaultBase");
					String defaultModelFilenameExtension = FILE_EXTENSIONS.get(0);
					String modelFilename = defaultModelBaseFilename + "." + defaultModelFilenameExtension;
					for (int i = 1; ((IContainer)selectedResource).findMember(modelFilename) != null; ++i) {
						modelFilename = defaultModelBaseFilename + i + "." + defaultModelFilenameExtension;
					}
					newFileCreationPage.setFileName(modelFilename);
				}
			}
		}
	}

	/**
	 * Get the file from the page.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public IFile getModelFile() {
		return newFileCreationPage.getModelFile();
	}

}