vagrant/org.eclipse.linuxtools.vagrant.ui/src/org/eclipse/linuxtools/internal/vagrant/ui/wizards/CreateVMPage.java - linuxtools/org.eclipse.linuxtools - Git at Google

 /*******************************************************************************
  * Copyright (c) 2015, 2018 Red Hat.
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
  * which is available at https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     Red Hat - Initial Contribution
  *******************************************************************************/

 package org.eclipse.linuxtools.internal.vagrant.ui.wizards;

 import java.nio.file.Paths;
 import java.util.Map;

 import org.eclipse.core.databinding.DataBindingContext;
 import org.eclipse.core.databinding.beans.BeanProperties;
 import org.eclipse.core.databinding.observable.IObservable;
 import org.eclipse.core.databinding.observable.list.IObservableList;
 import org.eclipse.core.databinding.observable.list.WritableList;
 import org.eclipse.core.databinding.observable.value.IObservableValue;
 import org.eclipse.core.databinding.validation.MultiValidator;
 import org.eclipse.core.databinding.validation.ValidationStatus;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.jface.databinding.swt.WidgetProperties;
 import org.eclipse.jface.databinding.wizard.WizardPageSupport;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.jface.layout.GridLayoutFactory;
 import org.eclipse.jface.wizard.WizardPage;
 import org.eclipse.linuxtools.internal.vagrant.core.EnvironmentsManager;
 import org.eclipse.linuxtools.internal.vagrant.ui.SWTImagesFactory;
 import org.eclipse.linuxtools.vagrant.core.IVagrantBox;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.ScrolledComposite;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.FileDialog;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;

 public class CreateVMPage extends WizardPage {

 	private final CreateVMPageModel model;
 	private final DataBindingContext dbc;

 	private CreateVMAdvancedComposite advanced;

 	public CreateVMPage(IVagrantBox box) {
 		super("createVMPage", //$NON-NLS-1$
 				WizardMessages.getString("CreateVM.label"), //$NON-NLS-1$
 				SWTImagesFactory.DESC_BANNER_REPOSITORY);
 		setMessage(WizardMessages.getString("CreateVM.desc")); //$NON-NLS-1$
 		this.model = new CreateVMPageModel();
 		if (box != null) {
 			this.model.setBoxRef(box.getName());
 		}
 		this.dbc = new DataBindingContext();
 	}

 	@Override
 	public void dispose() {
 		dbc.dispose();
 		super.dispose();
 	}

 	public String getVMName() {
 		return model.getVFileMode() ? null : this.model.getVMName();
 	}

 	public String getBoxReference() {
 		return model.getVFileMode() ? null : this.model.getBoxRef();
 	}

 	public String getVMFile() {
 		return model.getVFileMode() ? this.model.getVMFile() : null;
 	}

 	public Map<String, String> getEnvironment() {
 		return model.getEnvironment();
 	}

 	@Override
 	public void createControl(Composite parent) {
 		ScrolledComposite scrollTop = new ScrolledComposite(parent, SWT.H_SCROLL | SWT.V_SCROLL);
 		scrollTop.setExpandVertical(true);
 		scrollTop.setExpandHorizontal(true);

 		final Composite container = new Composite(scrollTop, SWT.NONE);
 		GridLayoutFactory.fillDefaults().numColumns(3).margins(6, 6)
 				.applyTo(container);

 		// VM Name
 		final Label vmNameLabel = new Label(container, SWT.NONE);
 		vmNameLabel
 				.setText(WizardMessages.getString("CreateVM.name.label")); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(false, false).applyTo(vmNameLabel);

 		final Text vmNameText = new Text(container, SWT.BORDER);
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(true, false).span(2, 1).applyTo(vmNameText);
 		vmNameText.setToolTipText(
 				WizardMessages.getString("CreateVMPage.name.tooltip")); //$NON-NLS-1$
 		// VM Name binding
 		final IObservableValue<String> vmmNameObservable = BeanProperties
 				.value(CreateVMPageModel.class, CreateVMPageModel.VM_NAME)
 				.observe(model);
 		dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(vmNameText),
 				vmmNameObservable);

 		// Box name
 		final Label boxRefLabel = new Label(container, SWT.NONE);
 		boxRefLabel
 				.setText(WizardMessages.getString("CreateVMPage.boxRef.label")); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(false, false).applyTo(boxRefLabel);

 		final Text boxRefText = new Text(container, SWT.BORDER);
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(true, false).applyTo(boxRefText);
 		boxRefText.setToolTipText(
 				WizardMessages.getString("CreateVMPage.boxRef.tooltip")); //$NON-NLS-1$
 		// Box Name binding
 		final IObservableValue<String> boxRefObservable = BeanProperties
 				.value(CreateVMPageModel.class, CreateVMPageModel.BOX_REF)
 				.observe(model);
 		dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(boxRefText),
 				boxRefObservable);

 		// Box name search
 		final Button boxSearchButton = new Button(container, SWT.NONE);
 		boxSearchButton
 				.setText(WizardMessages.getString("CreateVMPage.search.label")); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(false, false).applyTo(boxSearchButton);
 		boxSearchButton.addSelectionListener(onSearchImage());

 		// VM File Checkbox
 		final Button customVMFileButton = new Button(container, SWT.CHECK);
 		customVMFileButton
 				.setText(WizardMessages.getString("CreateVMPage.File.CheckBox")); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(false, false).span(3, 1).applyTo(customVMFileButton);
 		final IObservableValue<String> customVMFileObservable = BeanProperties
 				.value(CreateVMPageModel.class, CreateVMPageModel.V_FILE_MODE)
 				.observe(model);
 		dbc.bindValue(WidgetProperties.selection().observe(customVMFileButton),
 				customVMFileObservable);

 		// VM File
 		final Label boxLocLabel = new Label(container, SWT.NONE);
 		boxLocLabel
 				.setText(WizardMessages.getString("CreateVMPage.loc.label")); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(false, false).applyTo(boxLocLabel);

 		final Text boxLocText = new Text(container, SWT.BORDER);
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(true, false).applyTo(boxLocText);
 		boxLocText.setToolTipText(
 				WizardMessages.getString("CreateVMPage.loc.tooltip")); //$NON-NLS-1$
 		boxLocText.setEnabled(false);
 		// Location binding
 		final IObservableValue<String> boxLocObservable = BeanProperties
 				.value(CreateVMPageModel.class, CreateVMPageModel.VM_FILE)
 				.observe(model);
 		dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(boxLocText),
 				boxLocObservable);
 		boxLocText.addModifyListener(e -> vmFileChanged(boxLocText.getText()));

 		// Vagrantfile search
 		final Button vgFilesearchButton = new Button(container, SWT.NONE);
 		vgFilesearchButton
 				.setText(WizardMessages.getString("CreateVMPage.search.label")); //$NON-NLS-1$
 		vgFilesearchButton.setEnabled(false);
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
 				.grab(false, false).applyTo(vgFilesearchButton);
 		vgFilesearchButton.addSelectionListener(onSearchVMFile());

 		customVMFileButton.addSelectionListener(
 				onCheckCustomVMFile(vmNameText, boxRefText, boxLocText, vgFilesearchButton, boxSearchButton));

 		dbc.addValidationStatusProvider(new CreateVMValidationStatusProvider(vmmNameObservable,
 				boxRefObservable, boxLocObservable));

 		advanced = new CreateVMAdvancedComposite(
 				container, scrollTop, model);
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).span(3, 1)
 				.grab(true, false).applyTo(advanced);

 		// setup validation support
 		WizardPageSupport.create(this, dbc);

 		scrollTop.setContent(container);
 		Point point = container.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 		scrollTop.setSize(point);
 		scrollTop.setMinSize(point);
 		setControl(container);
 	}

 	private SelectionListener onCheckCustomVMFile(Text vmNameText,
 			Text boxRefText, Text boxLocText, Button searchButton,
 			Button boxSearchButton) {
 		return SelectionListener.widgetSelectedAdapter(e -> {
 			if (e.widget instanceof Button) {
 				Button bt = (Button) e.widget;
 				if (bt.getSelection()) {
 					vmNameText.setEnabled(false);
 					boxRefText.setEnabled(false);
 					boxSearchButton.setEnabled(false);
 					searchButton.setEnabled(true);
 					boxLocText.setEnabled(true);
 					model.setVFileMode(true);
 				} else {
 					vmNameText.setEnabled(true);
 					boxRefText.setEnabled(true);
 					boxSearchButton.setEnabled(true);
 					searchButton.setEnabled(false);
 					boxLocText.setEnabled(false);
 					model.setVFileMode(false);
 				}
 			}
 		});
 	}

 	private SelectionListener onSearchImage() {
 		return SelectionListener.widgetSelectedAdapter(e -> {
 			FileDialog fd = new FileDialog(getShell());
 			String location = fd.open();
 			if (location != null && !location.isEmpty()) {
 				model.setBoxRef(location);
 			}
 		});
 	}

 	private SelectionListener onSearchVMFile() {
 		return SelectionListener.widgetSelectedAdapter(e -> {
 			FileDialog fd = new FileDialog(getShell());
 			String location = fd.open();
 			if (location != null && !location.isEmpty()) {
 				model.setVMFile(location);
 				vmFileChanged(location);
 			}
 		});
 	}

 	private void vmFileChanged(String vagrantFile) {
 		IPath folder = new Path(vagrantFile).removeLastSegments(1);
 		Map<String, String> existingEnv = EnvironmentsManager.getSingleton()
 				.getEnvironment(folder.toFile());
 		if (existingEnv != null) {
 			model.setEnvironment(existingEnv);
 			advanced.refresh();
 		}
 	}

 	private class CreateVMValidationStatusProvider extends MultiValidator {

 		private IObservableValue<String> vmNameOb, boxRefOb, boxLocOb;

 		public CreateVMValidationStatusProvider(
 				IObservableValue<String> vmNameOb,
 				IObservableValue<String> boxRefOb,
 				IObservableValue<String> boxLocOb) {
 			this.vmNameOb = vmNameOb;
 			this.boxRefOb = boxRefOb;
 			this.boxLocOb = boxLocOb;
 		}

 		@Override
 		public IObservableList<IObservable> getTargets() {
 			// Work around for NPE triggered by DialogPageSupport.dispose()
 			return new WritableList<>();
 		}

 		@Override
 		protected IStatus validate() {
 			String vmName = vmNameOb.getValue();
 			String boxRef = boxRefOb.getValue();
 			String boxLoc = boxLocOb.getValue();
 			if (!model.getVFileMode()) {
 				if (vmName == null || vmName.isEmpty()) {
 					return ValidationStatus.error(WizardMessages
 							.getString("CreateVMPage.emptyVMName")); //$NON-NLS-1$
 				} else if (boxRef == null || boxRef.isEmpty()) {
 					return ValidationStatus.error(WizardMessages
 							.getString("CreateVMPage.emptyBoxRef")); //$NON-NLS-1$
 				}
 			} else {
 				if (boxLoc == null || boxLoc.isEmpty()) {
 					return ValidationStatus.error(WizardMessages
 							.getString("CreateVMPage.emptyVagrantfile")); //$NON-NLS-1$
 				}
 				if (!Paths.get(boxLoc).toFile().canRead()) {
 					return ValidationStatus.error(WizardMessages
 							.getString("CreateVMPage.invalidVagrantfile")); //$NON-NLS-1$
 				}
 			}
 			return ValidationStatus.ok();
 		}

 	}
 }
	/*******************************************************************************
	* Copyright (c) 2015, 2018 Red Hat.
	*
	* This program and the accompanying materials are made
	* available under the terms of the Eclipse Public License 2.0
	* which is available at https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Red Hat - Initial Contribution
	*******************************************************************************/

	package org.eclipse.linuxtools.internal.vagrant.ui.wizards;

	import java.nio.file.Paths;
	import java.util.Map;

	import org.eclipse.core.databinding.DataBindingContext;
	import org.eclipse.core.databinding.beans.BeanProperties;
	import org.eclipse.core.databinding.observable.IObservable;
	import org.eclipse.core.databinding.observable.list.IObservableList;
	import org.eclipse.core.databinding.observable.list.WritableList;
	import org.eclipse.core.databinding.observable.value.IObservableValue;
	import org.eclipse.core.databinding.validation.MultiValidator;
	import org.eclipse.core.databinding.validation.ValidationStatus;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.jface.databinding.swt.WidgetProperties;
	import org.eclipse.jface.databinding.wizard.WizardPageSupport;
	import org.eclipse.jface.layout.GridDataFactory;
	import org.eclipse.jface.layout.GridLayoutFactory;
	import org.eclipse.jface.wizard.WizardPage;
	import org.eclipse.linuxtools.internal.vagrant.core.EnvironmentsManager;
	import org.eclipse.linuxtools.internal.vagrant.ui.SWTImagesFactory;
	import org.eclipse.linuxtools.vagrant.core.IVagrantBox;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.ScrolledComposite;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.FileDialog;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;

	public class CreateVMPage extends WizardPage {

	private final CreateVMPageModel model;
	private final DataBindingContext dbc;

	private CreateVMAdvancedComposite advanced;

	public CreateVMPage(IVagrantBox box) {
	super("createVMPage", //$NON-NLS-1$
	WizardMessages.getString("CreateVM.label"), //$NON-NLS-1$
	SWTImagesFactory.DESC_BANNER_REPOSITORY);
	setMessage(WizardMessages.getString("CreateVM.desc")); //$NON-NLS-1$
	this.model = new CreateVMPageModel();
	if (box != null) {
	this.model.setBoxRef(box.getName());
	}
	this.dbc = new DataBindingContext();
	}

	@Override
	public void dispose() {
	dbc.dispose();
	super.dispose();
	}

	public String getVMName() {
	return model.getVFileMode() ? null : this.model.getVMName();
	}

	public String getBoxReference() {
	return model.getVFileMode() ? null : this.model.getBoxRef();
	}

	public String getVMFile() {
	return model.getVFileMode() ? this.model.getVMFile() : null;
	}

	public Map<String, String> getEnvironment() {
	return model.getEnvironment();
	}

	@Override
	public void createControl(Composite parent) {
	ScrolledComposite scrollTop = new ScrolledComposite(parent, SWT.H_SCROLL \| SWT.V_SCROLL);
	scrollTop.setExpandVertical(true);
	scrollTop.setExpandHorizontal(true);

	final Composite container = new Composite(scrollTop, SWT.NONE);
	GridLayoutFactory.fillDefaults().numColumns(3).margins(6, 6)
	.applyTo(container);

	// VM Name
	final Label vmNameLabel = new Label(container, SWT.NONE);
	vmNameLabel
	.setText(WizardMessages.getString("CreateVM.name.label")); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(false, false).applyTo(vmNameLabel);

	final Text vmNameText = new Text(container, SWT.BORDER);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(true, false).span(2, 1).applyTo(vmNameText);
	vmNameText.setToolTipText(
	WizardMessages.getString("CreateVMPage.name.tooltip")); //$NON-NLS-1$
	// VM Name binding
	final IObservableValue<String> vmmNameObservable = BeanProperties
	.value(CreateVMPageModel.class, CreateVMPageModel.VM_NAME)
	.observe(model);
	dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(vmNameText),
	vmmNameObservable);

	// Box name
	final Label boxRefLabel = new Label(container, SWT.NONE);
	boxRefLabel
	.setText(WizardMessages.getString("CreateVMPage.boxRef.label")); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(false, false).applyTo(boxRefLabel);

	final Text boxRefText = new Text(container, SWT.BORDER);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(true, false).applyTo(boxRefText);
	boxRefText.setToolTipText(
	WizardMessages.getString("CreateVMPage.boxRef.tooltip")); //$NON-NLS-1$
	// Box Name binding
	final IObservableValue<String> boxRefObservable = BeanProperties
	.value(CreateVMPageModel.class, CreateVMPageModel.BOX_REF)
	.observe(model);
	dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(boxRefText),
	boxRefObservable);

	// Box name search
	final Button boxSearchButton = new Button(container, SWT.NONE);
	boxSearchButton
	.setText(WizardMessages.getString("CreateVMPage.search.label")); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(false, false).applyTo(boxSearchButton);
	boxSearchButton.addSelectionListener(onSearchImage());

	// VM File Checkbox
	final Button customVMFileButton = new Button(container, SWT.CHECK);
	customVMFileButton
	.setText(WizardMessages.getString("CreateVMPage.File.CheckBox")); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(false, false).span(3, 1).applyTo(customVMFileButton);
	final IObservableValue<String> customVMFileObservable = BeanProperties
	.value(CreateVMPageModel.class, CreateVMPageModel.V_FILE_MODE)
	.observe(model);
	dbc.bindValue(WidgetProperties.selection().observe(customVMFileButton),
	customVMFileObservable);

	// VM File
	final Label boxLocLabel = new Label(container, SWT.NONE);
	boxLocLabel
	.setText(WizardMessages.getString("CreateVMPage.loc.label")); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(false, false).applyTo(boxLocLabel);

	final Text boxLocText = new Text(container, SWT.BORDER);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(true, false).applyTo(boxLocText);
	boxLocText.setToolTipText(
	WizardMessages.getString("CreateVMPage.loc.tooltip")); //$NON-NLS-1$
	boxLocText.setEnabled(false);
	// Location binding
	final IObservableValue<String> boxLocObservable = BeanProperties
	.value(CreateVMPageModel.class, CreateVMPageModel.VM_FILE)
	.observe(model);
	dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(boxLocText),
	boxLocObservable);
	boxLocText.addModifyListener(e -> vmFileChanged(boxLocText.getText()));

	// Vagrantfile search
	final Button vgFilesearchButton = new Button(container, SWT.NONE);
	vgFilesearchButton
	.setText(WizardMessages.getString("CreateVMPage.search.label")); //$NON-NLS-1$
	vgFilesearchButton.setEnabled(false);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)
	.grab(false, false).applyTo(vgFilesearchButton);
	vgFilesearchButton.addSelectionListener(onSearchVMFile());

	customVMFileButton.addSelectionListener(
	onCheckCustomVMFile(vmNameText, boxRefText, boxLocText, vgFilesearchButton, boxSearchButton));

	dbc.addValidationStatusProvider(new CreateVMValidationStatusProvider(vmmNameObservable,
	boxRefObservable, boxLocObservable));

	advanced = new CreateVMAdvancedComposite(
	container, scrollTop, model);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).span(3, 1)
	.grab(true, false).applyTo(advanced);

	// setup validation support
	WizardPageSupport.create(this, dbc);

	scrollTop.setContent(container);
	Point point = container.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	scrollTop.setSize(point);
	scrollTop.setMinSize(point);
	setControl(container);
	}

	private SelectionListener onCheckCustomVMFile(Text vmNameText,
	Text boxRefText, Text boxLocText, Button searchButton,
	Button boxSearchButton) {
	return SelectionListener.widgetSelectedAdapter(e -> {
	if (e.widget instanceof Button) {
	Button bt = (Button) e.widget;
	if (bt.getSelection()) {
	vmNameText.setEnabled(false);
	boxRefText.setEnabled(false);
	boxSearchButton.setEnabled(false);
	searchButton.setEnabled(true);
	boxLocText.setEnabled(true);
	model.setVFileMode(true);
	} else {
	vmNameText.setEnabled(true);
	boxRefText.setEnabled(true);
	boxSearchButton.setEnabled(true);
	searchButton.setEnabled(false);
	boxLocText.setEnabled(false);
	model.setVFileMode(false);
	}
	}
	});
	}

	private SelectionListener onSearchImage() {
	return SelectionListener.widgetSelectedAdapter(e -> {
	FileDialog fd = new FileDialog(getShell());
	String location = fd.open();
	if (location != null && !location.isEmpty()) {
	model.setBoxRef(location);
	}
	});
	}

	private SelectionListener onSearchVMFile() {
	return SelectionListener.widgetSelectedAdapter(e -> {
	FileDialog fd = new FileDialog(getShell());
	String location = fd.open();
	if (location != null && !location.isEmpty()) {
	model.setVMFile(location);
	vmFileChanged(location);
	}
	});
	}

	private void vmFileChanged(String vagrantFile) {
	IPath folder = new Path(vagrantFile).removeLastSegments(1);
	Map<String, String> existingEnv = EnvironmentsManager.getSingleton()
	.getEnvironment(folder.toFile());
	if (existingEnv != null) {
	model.setEnvironment(existingEnv);
	advanced.refresh();
	}
	}

	private class CreateVMValidationStatusProvider extends MultiValidator {

	private IObservableValue<String> vmNameOb, boxRefOb, boxLocOb;

	public CreateVMValidationStatusProvider(
	IObservableValue<String> vmNameOb,
	IObservableValue<String> boxRefOb,
	IObservableValue<String> boxLocOb) {
	this.vmNameOb = vmNameOb;
	this.boxRefOb = boxRefOb;
	this.boxLocOb = boxLocOb;
	}

	@Override
	public IObservableList<IObservable> getTargets() {
	// Work around for NPE triggered by DialogPageSupport.dispose()
	return new WritableList<>();
	}

	@Override
	protected IStatus validate() {
	String vmName = vmNameOb.getValue();
	String boxRef = boxRefOb.getValue();
	String boxLoc = boxLocOb.getValue();
	if (!model.getVFileMode()) {
	if (vmName == null \|\| vmName.isEmpty()) {
	return ValidationStatus.error(WizardMessages
	.getString("CreateVMPage.emptyVMName")); //$NON-NLS-1$
	} else if (boxRef == null \|\| boxRef.isEmpty()) {
	return ValidationStatus.error(WizardMessages
	.getString("CreateVMPage.emptyBoxRef")); //$NON-NLS-1$
	}
	} else {
	if (boxLoc == null \|\| boxLoc.isEmpty()) {
	return ValidationStatus.error(WizardMessages
	.getString("CreateVMPage.emptyVagrantfile")); //$NON-NLS-1$
	}
	if (!Paths.get(boxLoc).toFile().canRead()) {
	return ValidationStatus.error(WizardMessages
	.getString("CreateVMPage.invalidVagrantfile")); //$NON-NLS-1$
	}
	}
	return ValidationStatus.ok();
	}

	}
	}