Example usage for org.eclipse.jface.databinding.fieldassist ControlDecorationSupport create

List of usage examples for org.eclipse.jface.databinding.fieldassist ControlDecorationSupport create

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Introduction

In this page you can find the example usage for org.eclipse.jface.databinding.fieldassist ControlDecorationSupport create.

Prototype

public static ControlDecorationSupport create(ValidationStatusProvider validationStatusProvider, int position,
        Composite composite)

Source Link

Document

Creates a ControlDecorationSupport which observes the validation status of the specified ValidationStatusProvider , and displays a ControlDecoration over the underlying SWT control of all target observables that implement ISWTObservable or IViewerObservable .

Usage

From source file:org.eclipse.core.databinding.validation.jsr303.samples.Jsr303PersonSnippet.java

License:Open Source License

public static void main(String[] args) {
    // Display state of JSR-303 Bean Support
    System.out.println("JSR-303 Bean Support available?: " + Jsr303BeanValidationSupport.isAvailable());
    System.out.println("OSGi context?: " + Jsr303BeanValidationSupport.isOSGi());
    System.out.println("JSR-303 Bean Support ValidatorFactory Implementation: "
            + Jsr303BeanValidationSupport.getValidatorFactoryClassName());
    System.out.println("JSR-303 Bean Support strategy resolver?: " + Jsr303BeanValidationSupport.getStrategy());

    // Create UI+Binding
    final Display display = new Display();
    Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
        public void run() {
            final Shell shell = new Shell(display);

            shell.setLayout(new FillLayout());

            Composite parent = new Composite(shell, SWT.NONE);
            parent.setLayout(new GridLayout(2, false));
            parent.setLayoutData(new GridData(GridData.FILL_BOTH));
            Person model = new Person();

            // UI Name
            Label nameLabel = new Label(parent, SWT.NONE);
            nameLabel.setText("Name:");
            Text nameText = new Text(parent, SWT.BORDER);
            nameText.setLayoutData(new GridData(GridData.FILL_BOTH));

            // UI Email
            Label emailLabel = new Label(parent, SWT.NONE);
            emailLabel.setText("Email:");
            Text emailText = new Text(parent, SWT.BORDER);
            emailText.setLayoutData(new GridData(GridData.FILL_BOTH));

            DataBindingContext dataBindingContext = new DataBindingContext(SWTObservables.getRealm(display));

            // Binding Name
            IObservableValue nameTextObserveTextObserveWidget = SWTObservables.observeText(nameText,
                    SWT.Modify);/*  w w w  .j av  a2s .  co  m*/
            IObservableValue modelNameObserveValue = PojoObservables.observeValue(model, "name");

            Binding binding = dataBindingContext.bindValue(nameTextObserveTextObserveWidget,
                    modelNameObserveValue, Jsr303BeansUpdateValueStrategyFactory.create(modelNameObserveValue),
                    null);
            ControlDecorationSupport.create(binding, SWT.LEFT, parent);

            // Binding Email
            IObservableValue emailTextObserveTextObserveWidget = SWTObservables.observeText(emailText,
                    SWT.Modify);
            IObservableValue modelEmailObserveValue = PojoObservables.observeValue(model, "email");

            binding = dataBindingContext.bindValue(emailTextObserveTextObserveWidget, modelEmailObserveValue,
                    Jsr303BeansUpdateValueStrategyFactory.create(modelEmailObserveValue), null);
            ControlDecorationSupport.create(binding, SWT.LEFT, parent);

            shell.setSize(200, 100);
            shell.open();

            // The SWT event loop
            Display display = Display.getCurrent();
            while (!shell.isDisposed()) {
                if (!display.readAndDispatch()) {
                    display.sleep();
                }
            }
        }
    });
}

From source file:org.eclipse.core.databinding.validation.jsr303.samples.rcp.editor.OverviewPage.java

License:Open Source License

private void createBindings() {

    Person person = getEditor().getPerson();
    DataBindingContext dataBindingContext = new DataBindingContext();

    // Binding name
    IObservableValue textObserveTextObserveWidget = SWTObservables.observeText(personNameText, SWT.Modify);
    IObservableValue modelNameObserveValue = PojoObservables.observeValue(person, "name");
    Binding binding = dataBindingContext.bindValue(textObserveTextObserveWidget, modelNameObserveValue,
            Jsr303BeansUpdateValueStrategyFactory.create(modelNameObserveValue), null);
    ControlDecorationSupport.create(binding, SWT.LEFT, parent);

    // Binding email
    IObservableValue emailTextObserveTextObserveWidget = SWTObservables.observeText(personEmailText,
            SWT.Modify);/*from  w w w.  j  a v  a 2s  .  c  o  m*/
    IObservableValue modelEmailObserveValue = PojoObservables.observeValue(person, "email");
    binding = dataBindingContext.bindValue(emailTextObserveTextObserveWidget, modelEmailObserveValue,
            Jsr303BeansUpdateValueStrategyFactory.create(modelEmailObserveValue), null);
    ControlDecorationSupport.create(binding, SWT.LEFT, parent);
}

From source file:org.jboss.tools.fuse.transformation.editor.internal.wizards.Hl7Page.java

License:Open Source License

private void bindControls() {

    // Bind source file path widget to UI model
    final IObservableValue widgetValue = WidgetProperties.text(SWT.Modify).observe(hl7FileText);
    IObservableValue modelValue;/*from  w w w.j a  v a  2  s . c  om*/
    if (isSourcePage()) {
        modelValue = BeanProperties.value(Model.class, "sourceFilePath").observe(model); //$NON-NLS-1$
    } else {
        modelValue = BeanProperties.value(Model.class, "targetFilePath").observe(model); //$NON-NLS-1$
    }
    final UpdateValueStrategy strategy = new UpdateValueStrategy();

    PathValidator pathValidator = new PathValidator();
    FileEmptyValidator fileEmptyValidator = new FileEmptyValidator();
    JSONValidator jsonValidator = new JSONValidator();
    CompoundValidator compoundJSONTextValidator = new CompoundValidator(pathValidator, fileEmptyValidator,
            jsonValidator);
    strategy.setBeforeSetValidator(compoundJSONTextValidator);

    _binding = context.bindValue(widgetValue, modelValue, strategy, null);
    ControlDecorationSupport.create(_binding, decoratorPosition, hl7FileText.getParent());

    widgetValue.addValueChangeListener(new IValueChangeListener() {

        @Override
        public void handleValueChange(ValueChangeEvent event) {
            if (!Hl7Page.this.isCurrentPage()) {
                return;
            }
            Object value = event.diff.getNewValue();
            String path = null;
            if (value != null && !value.toString().trim().isEmpty()) {
                path = value.toString().trim();
            }
            if (path != null) {
                try {
                    IResource resource = CamelUtils.project().findMember(path);
                    if (resource == null || !resource.exists() || !(resource instanceof IFile)) {
                        return;
                    }
                    if (fileIsEmpty(path)) {
                        return;
                    }
                    String jsonText = getJsonText((IFile) resource);
                    if (!Util.jsonValid(jsonText)) {
                        return;
                    }
                    IPath filePath = resource.getLocation();
                    String fullpath = filePath.makeAbsolute().toPortableString();
                    updateSettingsBasedOnFilePath(fullpath);
                    if (isSourcePage()) {
                        model.setSourceFilePath(path);
                    } else {
                        model.setTargetFilePath(path);
                    }
                    updatePreview(resource.getProjectRelativePath().toString());
                    hl7FileText.notifyListeners(SWT.Modify, new Event());
                } catch (final Exception e) {
                    Activator.error(e);
                }
            }
        }
    });

    listenForValidationChanges();
}

From source file:org.jboss.tools.fuse.transformation.editor.internal.wizards.JavaPage.java

License:Open Source License

private void bindControls() {

    // Bind source file path widget to UI model
    IObservableValue widgetValue = WidgetProperties.text(SWT.Modify).observe(_javaClassText);
    IObservableValue modelValue;/*from  www  . jav a  2s  .  c om*/
    if (isSourcePage()) {
        modelValue = BeanProperties.value(Model.class, "sourceFilePath").observe(model); //$NON-NLS-1$
    } else {
        modelValue = BeanProperties.value(Model.class, "targetFilePath").observe(model); //$NON-NLS-1$
    }
    UpdateValueStrategy strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            final String path = value == null ? null : value.toString().trim();
            String pathEmptyError;
            String unableToFindError;
            if (isSourcePage()) {
                pathEmptyError = Messages.JavaPage_pathEmptyError_source;
                unableToFindError = Messages.JavaPage_unableToFindError_source;
            } else {
                pathEmptyError = Messages.JavaPage_pathEmptyError_target;
                unableToFindError = Messages.JavaPage_unableToFindError_target;
            }
            if (path == null || path.isEmpty()) {
                return ValidationStatus.error(pathEmptyError);
            }
            NewTransformationWizard wizard = (NewTransformationWizard) getWizard();
            try {
                Class<?> tempClass = wizard.loader().loadClass(path);
                if (tempClass == null) {
                    return ValidationStatus.error(unableToFindError);
                }
            } catch (ClassNotFoundException e) {
                return ValidationStatus.error(unableToFindError);
            }
            return ValidationStatus.ok();
        }
    });
    _binding = context.bindValue(widgetValue, modelValue, strategy, null);
    ControlDecorationSupport.create(_binding, decoratorPosition, _javaClassText.getParent());

    listenForValidationChanges();
}

From source file:org.jboss.tools.fuse.transformation.editor.internal.wizards.JSONPage.java

License:Open Source License

private void bindControls() {

    // Bind source file path widget to UI model
    final IObservableValue widgetValue = WidgetProperties.text(SWT.Modify).observe(_jsonFileText);
    IObservableValue modelValue;/*w w w.j  av a2s . com*/
    if (isSourcePage()) {
        modelValue = BeanProperties.value(Model.class, "sourceFilePath").observe(model); //$NON-NLS-1$
    } else {
        modelValue = BeanProperties.value(Model.class, "targetFilePath").observe(model); //$NON-NLS-1$
    }
    final UpdateValueStrategy strategy = new UpdateValueStrategy();

    PathValidator pathValidator = new PathValidator();
    FileEmptyValidator fileEmptyValidator = new FileEmptyValidator();
    JSONValidator jsonValidator = new JSONValidator();
    CompoundValidator compoundJSONTextValidator = new CompoundValidator(pathValidator, fileEmptyValidator,
            jsonValidator);
    strategy.setBeforeSetValidator(compoundJSONTextValidator);

    _binding = context.bindValue(widgetValue, modelValue, strategy, null);
    ControlDecorationSupport.create(_binding, decoratorPosition, _jsonFileText.getParent());

    widgetValue.addValueChangeListener(new IValueChangeListener() {

        @Override
        public void handleValueChange(ValueChangeEvent event) {
            if (!JSONPage.this.isCurrentPage()) {
                return;
            }
            Object value = event.diff.getNewValue();
            String path = null;
            if (value != null && !value.toString().trim().isEmpty()) {
                path = value.toString().trim();
            }
            if (path != null) {
                try {
                    IResource resource = CamelUtils.project().findMember(path);
                    if (resource == null || !resource.exists() || !(resource instanceof IFile)) {
                        return;
                    }
                    if (fileIsEmpty(path)) {
                        return;
                    }
                    String jsonText = getJsonText((IFile) resource);
                    if (!Util.jsonValid(jsonText)) {
                        return;
                    }
                    IPath filePath = resource.getLocation();
                    String fullpath = filePath.makeAbsolute().toPortableString();
                    updateSettingsBasedOnFilePath(fullpath);
                    if (isSourcePage()) {
                        model.setSourceFilePath(path);
                    } else {
                        model.setTargetFilePath(path);
                    }
                    updatePreview(resource.getProjectRelativePath().toString());
                    _jsonFileText.notifyListeners(SWT.Modify, new Event());
                } catch (final Exception e) {
                    Activator.error(e);
                }
            }
        }
    });

    listenForValidationChanges();
}

From source file:org.jboss.tools.fuse.transformation.editor.internal.wizards.OtherPage.java

License:Open Source License

private void bindControls() {

    // Bind source file path widget to UI model
    IObservableValue widgetValue = WidgetProperties.text(SWT.Modify).observe(_javaClassText);
    IObservableValue modelValue;//from  w w  w.ja  va  2 s . co m
    if (isSourcePage()) {
        modelValue = BeanProperties.value(Model.class, "sourceFilePath").observe(model); //$NON-NLS-1$
    } else {
        modelValue = BeanProperties.value(Model.class, "targetFilePath").observe(model); //$NON-NLS-1$
    }
    UpdateValueStrategy strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            final String path = value == null ? null : value.toString().trim();
            String pathEmptyError;
            String unableToFindError;
            if (isSourcePage()) {
                pathEmptyError = Messages.OtherPage_errorMessagePathEmptySource;
                unableToFindError = Messages.OtherPage_errorMessageNotFoundSource;
            } else {
                pathEmptyError = Messages.OtherPage_errorMessagePathEmptyTarget;
                unableToFindError = Messages.OtherPage_errorMessageNotFoundTarget;
            }
            if (path == null || path.isEmpty()) {
                return ValidationStatus.error(pathEmptyError);
            }
            NewTransformationWizard wizard = (NewTransformationWizard) getWizard();
            try {
                Class<?> tempClass = wizard.loader().loadClass(path);
                if (tempClass == null) {
                    return ValidationStatus.error(unableToFindError);
                }
            } catch (ClassNotFoundException e) {
                return ValidationStatus.error(unableToFindError);
            }
            return ValidationStatus.ok();
        }
    });
    _binding = context.bindValue(widgetValue, modelValue, strategy, null);
    ControlDecorationSupport.create(_binding, decoratorPosition, _javaClassText.getParent());

    listenForValidationChanges();
}

From source file:org.jboss.tools.fuse.transformation.editor.internal.wizards.OtherPage.java

License:Open Source License

public void initialize() {

    // Bind id widget to UI model
    IObservableValue widgetValue = ViewerProperties.singleSelection().observe(_dataFormatIdCombo);
    idModelValue = null;/*from  w  w  w  .j a  v  a 2s  . c  om*/

    WritableList dfList = new WritableList();
    CamelConfigBuilder configBuilder = new CamelConfigBuilder();

    Collection<AbstractCamelModelElement> dataFormats = configBuilder.getDataFormats();
    for (Iterator<AbstractCamelModelElement> iterator = dataFormats.iterator(); iterator.hasNext();) {
        AbstractCamelModelElement df = iterator.next();
        if (df.getId() != null) {
            dfList.add(df.getId());
        }
    }
    if (dfList.isEmpty()) {
        _dfErrorLabel.setText(Messages.OtherPage_errormessageNoAvailableDataFormats);
        _dfErrorLabel.setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_RED));
        _dataFormatIdCombo.getCombo().setEnabled(false);
    } else {
        _dfErrorLabel.setText(""); //$NON-NLS-1$
        _dataFormatIdCombo.getCombo().setEnabled(true);
    }
    _dataFormatIdCombo.setInput(dfList);
    if (isSourcePage()) {
        idModelValue = BeanProperties.value(Model.class, "sourceDataFormatid").observe(model); //$NON-NLS-1$
    } else {
        idModelValue = BeanProperties.value(Model.class, "targetDataFormatid").observe(model); //$NON-NLS-1$
    }
    UpdateValueStrategy strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            final String path = value == null ? null : value.toString().trim();
            if (path == null || path.isEmpty()) {
                return ValidationStatus.error(Messages.OtherPage_errormessageNoDataFormatId);
            }
            return ValidationStatus.ok();
        }
    });
    _binding2 = context.bindValue(widgetValue, idModelValue, strategy, null);
    ControlDecorationSupport.create(_binding2, decoratorPosition, _javaClassText.getParent());
}

From source file:org.jboss.tools.fuse.transformation.editor.internal.wizards.StartPage.java

License:Open Source License

private void bindControls() {

    IObservableValue dozerPathTextValue = WidgetProperties.text(SWT.Modify).observe(_dozerPathText);
    IObservableValue dozerPathValue = BeanProperties.value(Model.class, "filePath").observe(model); //$NON-NLS-1$

    // bind the project dropdown
    UpdateValueStrategy strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override// ww  w  . ja  v a  2s  . c o  m
        public IStatus validate(final Object value) {
            if (value == null) {
                return ValidationStatus.error(Messages.StartPage_errorMessageProjectMustBeSelected);
            }
            return ValidationStatus.ok();
        }
    });

    // Bind transformation ID widget to UI model
    IObservableValue idTextValue = WidgetProperties.text(SWT.Modify).observe(_idText);
    IObservableValue idValue = BeanProperties.value(Model.class, "id").observe(model); //$NON-NLS-1$

    strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            if (value == null || value.toString().trim().isEmpty()) {
                return ValidationStatus.error(Messages.StartPage_errorMessageIDMustBeSupplied);
            }
            final String id = value.toString().trim();
            final StringCharacterIterator iter = new StringCharacterIterator(id);
            for (char chr = iter.first(); chr != StringCharacterIterator.DONE; chr = iter.next()) {
                if (!Character.isJavaIdentifierPart(chr)) {
                    return ValidationStatus.error(Messages.StartPage_errorMessageInvalidCharacters);
                }
            }
            CamelConfigBuilder configBuilder = new CamelConfigBuilder();
            for (final String endpointId : configBuilder.getTransformEndpointIds()) {
                if (id.equalsIgnoreCase(endpointId)) {
                    return ValidationStatus.error(Messages.StartPage_errorMessageIDAlreadyExists);
                }
            }
            return ValidationStatus.ok();
        }
    });
    _endpointIdBinding = context.bindValue(idTextValue, idValue, strategy, null);
    ControlDecorationSupport.create(_endpointIdBinding, decoratorPosition, _idText.getParent());

    // Bind file path widget to UI model
    strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            if (value == null || value.toString().trim().isEmpty()) {
                return ValidationStatus.error(Messages.StartPage_errorMessageFlePathMissing);
            }
            if (!(value.toString().trim().isEmpty())) {
                if (CamelUtils.project() != null) {
                    final IFile file = CamelUtils.project().getFile(MavenUtils.RESOURCES_PATH + (String) value);
                    if (file != null && file.exists()) {
                        return ValidationStatus.warning(Messages.StartPage_errorMessageNameFileAlreadyExists);
                    }
                }
            }
            return ValidationStatus.ok();
        }
    });
    _filePathBinding = context.bindValue(dozerPathTextValue, dozerPathValue, strategy, null);
    ControlDecorationSupport.create(_filePathBinding, decoratorPosition, _dozerPathText.getParent());

    // bind the source type string dropdown
    _sourceCV.setContentProvider(new ObservableListContentProvider());
    IObservableValue widgetValue = ViewerProperties.singleSelection().observe(_sourceCV);
    IObservableValue modelValue = BeanProperties.value(Model.class, "sourceTypeStr").observe(model); //$NON-NLS-1$
    strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            getModel().setSourceFilePath("");
            ((NewTransformationWizard) getWizard()).resetSourceAndTargetPages();
            if (StartPage.this.getSourcePage() != null) {
                ((XformWizardPage) StartPage.this.getSourcePage()).clearControls();
            }
            UIJob uiJob = new UIJob(Messages.StartPage_openErroUiJobName) {
                @Override
                public IStatus runInUIThread(IProgressMonitor monitor) {
                    if (StartPage.this.getTargetPage() != null) {
                        ((XformWizardPage) StartPage.this.getTargetPage()).pingBinding();
                    }
                    return Status.OK_STATUS;
                }
            };
            uiJob.setSystem(true);
            uiJob.schedule();

            if (value == null || ((String) value).trim().isEmpty()) {
                resetFinish();
                return ValidationStatus.error(Messages.StartPage_errorMessageSourceTypeMissing);
            }
            return ValidationStatus.ok();
        }
    });

    WritableList sourceList = new WritableList();
    sourceList.add("Java"); //$NON-NLS-1$
    sourceList.add("XML"); //$NON-NLS-1$
    sourceList.add("JSON"); //$NON-NLS-1$
    sourceList.add("Other"); //$NON-NLS-1$
    sourceList.add(""); //$NON-NLS-1$
    _sourceCV.setInput(sourceList);
    ControlDecorationSupport.create(context.bindValue(widgetValue, modelValue, strategy, null),
            decoratorPosition, null);

    // bind the source type string dropdown
    _targetCV.setContentProvider(new ObservableListContentProvider());
    widgetValue = ViewerProperties.singleSelection().observe(_targetCV);
    modelValue = BeanProperties.value(Model.class, "targetTypeStr").observe(model); //$NON-NLS-1$
    strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            getModel().setTargetFilePath("");
            ((NewTransformationWizard) getWizard()).resetSourceAndTargetPages();
            if (StartPage.this.getTargetPage() != null) {
                ((XformWizardPage) StartPage.this.getTargetPage()).clearControls();
            }
            UIJob uiJob = new UIJob(Messages.StartPage_openErroruiJobName) {
                @Override
                public IStatus runInUIThread(IProgressMonitor monitor) {
                    if (StartPage.this.getSourcePage() != null) {
                        ((XformWizardPage) StartPage.this.getSourcePage()).pingBinding();
                    }
                    return Status.OK_STATUS;
                }
            };
            uiJob.setSystem(true);
            uiJob.schedule();

            if (value == null || ((String) value).trim().isEmpty()) {
                resetFinish();
                return ValidationStatus.error(Messages.StartPage_errorMessageTargetTypeMissing);
            }
            return ValidationStatus.ok();
        }
    });

    WritableList targetList = new WritableList();
    targetList.add("Java"); //$NON-NLS-1$
    targetList.add("XML"); //$NON-NLS-1$
    targetList.add("JSON"); //$NON-NLS-1$
    targetList.add("Other"); //$NON-NLS-1$
    targetList.add(""); //$NON-NLS-1$
    _targetCV.setInput(targetList);
    ControlDecorationSupport.create(context.bindValue(widgetValue, modelValue, strategy, null),
            decoratorPosition, null);

    listenForValidationChanges();
}

From source file:org.jboss.tools.fuse.transformation.editor.internal.wizards.XMLPage.java

License:Open Source License

private void bindControls() {

    // Bind source file path widget to UI model
    IObservableValue widgetValue = WidgetProperties.text(SWT.Modify).observe(_xmlFileText);
    IObservableValue modelValue;/*from   w  w w. j  av  a  2  s  .  c  o m*/
    if (isSourcePage()) {
        modelValue = BeanProperties.value(Model.class, "sourceFilePath").observe(model); //$NON-NLS-1$
    } else {
        modelValue = BeanProperties.value(Model.class, "targetFilePath").observe(model); //$NON-NLS-1$
    }
    UpdateValueStrategy strategy = new UpdateValueStrategy();
    strategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            final String path = value == null ? null : value.toString().trim();
            String pathEmptyError;
            String unableToFindError;
            String unableToParseXMLError;
            if (isSourcePage()) {
                pathEmptyError = Messages.XMLPage_errorMessageEmptySourcepath;
                unableToFindError = Messages.XMLPage_errorMessageUnableToFindSourceFile;
                unableToParseXMLError = Messages.XMLPage_errorMessageSourceParseError;
            } else {
                pathEmptyError = Messages.XMLPage_errorMessageEmptyTargetpath;
                unableToFindError = Messages.XMLPage_errorMessageUnableToFindTargetFile;
                unableToParseXMLError = Messages.XMLPage_errorMessageTargetParseError;
            }
            if (path == null || path.isEmpty()) {
                clearSelection();
                return ValidationStatus.error(pathEmptyError);
            }
            if (CamelUtils.project().findMember(path) == null) {
                clearSelection();
                return ValidationStatus.error(unableToFindError);
            }
            IResource resource = CamelUtils.project().findMember(path);
            if (resource == null || !resource.exists() || !(resource instanceof IFile)) {
                clearSelection();
                return ValidationStatus.error(unableToFindError);
            }
            XmlMatchingStrategy strategy = new XmlMatchingStrategy();
            if (!strategy.matches((IFile) resource)) {
                clearSelection();
                return ValidationStatus.error(unableToParseXMLError);
            }
            return ValidationStatus.ok();
        }
    });
    widgetValue.addValueChangeListener(new IValueChangeListener() {

        @Override
        public void handleValueChange(ValueChangeEvent event) {
            if (!XMLPage.this.isCurrentPage()) {
                return;
            }
            Object value = event.diff.getNewValue();
            String path = null;
            if (value != null && !value.toString().trim().isEmpty()) {
                path = value.toString().trim();
            }
            if (path == null) {
                return;
            }
            XmlModelGenerator modelGen = new XmlModelGenerator();
            List<QName> elements = null;
            IResource resource = CamelUtils.project().findMember(path);
            if (resource == null || !resource.exists() || !(resource instanceof IFile)) {
                return;
            }
            IPath filePath = resource.getLocation();
            path = filePath.makeAbsolute().toPortableString();
            if (model != null) {
                updateSettingsBasedOnFilePath(path);
                if (isSourcePage() && model.getSourceType() != null) {
                    if (model.getSourceType().equals(ModelType.XSD)) {
                        try {
                            elements = modelGen.getElementsFromSchema(new File(path));
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    } else if (model.getSourceType().equals(ModelType.XML)) {
                        try {
                            QName element = modelGen.getRootElementName(new File(path));
                            if (element != null) {
                                elements = new ArrayList<>();
                                elements.add(element);
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                } else if (!isSourcePage() && model.getTargetType() != null) {
                    if (model.getTargetType().equals(ModelType.XSD)) {
                        try {
                            elements = modelGen.getElementsFromSchema(new File(path));
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    } else if (model.getTargetType().equals(ModelType.XML)) {
                        try {
                            QName element = modelGen.getRootElementName(new File(path));
                            if (element != null) {
                                elements = new ArrayList<>();
                                elements.add(element);
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }
                updatePreview(resource.getProjectRelativePath().toString());
            }
            WritableList elementList = new WritableList();
            if (elements != null && !elements.isEmpty()) {
                ArrayList<String> tempList = new ArrayList<>();
                Iterator<QName> iter = elements.iterator();
                while (iter.hasNext()) {
                    QName qname = iter.next();
                    tempList.add(qname.getLocalPart());
                    _xmlRootsCombo.setData(qname.getLocalPart(), qname.getNamespaceURI());
                }
                Collections.sort(tempList);
                elementList.addAll(tempList);
            }
            _xmlRootsCombo.setInput(elementList);
            if (!elementList.isEmpty()) {
                _xmlRootsCombo.setSelection(new StructuredSelection(elementList.get(0)));
                String elementName = (String) elementList.get(0);
                if (isSourcePage()) {
                    model.setSourceClassName(elementName);
                } else {
                    model.setTargetClassName(elementName);
                }
                _xmlRootsCombo.getCombo().setEnabled(true);
                if (elementList.size() == 1) {
                    _xmlRootsCombo.getCombo().setToolTipText(Messages.XMLPage_tooltipErrorOnlyOneElement);
                } else {
                    _xmlRootsCombo.getCombo().setToolTipText(Messages.XMLPage_tooltipSelectFromList);
                }
            }
        }
    });
    _binding = context.bindValue(widgetValue, modelValue, strategy, null);
    _binding.getModel().addChangeListener(new IChangeListener() {

        @Override
        public void handleChange(ChangeEvent event) {
            pingBinding();
        }
    });
    ControlDecorationSupport.create(_binding, decoratorPosition, _xmlFileText.getParent());

    IObservableValue comboWidgetValue = ViewerProperties.singleSelection().observe(_xmlRootsCombo);
    IObservableValue comboModelValue;
    if (isSourcePage()) {
        comboModelValue = BeanProperties.value(Model.class, "sourceClassName").observe(model); //$NON-NLS-1$
    } else {
        comboModelValue = BeanProperties.value(Model.class, "targetClassName").observe(model); //$NON-NLS-1$
    }

    UpdateValueStrategy combostrategy = new UpdateValueStrategy();
    combostrategy.setBeforeSetValidator(new IValidator() {

        @Override
        public IStatus validate(final Object value) {
            final String name = value == null ? null : value.toString().trim();
            if (name == null || name.isEmpty()) {
                return ValidationStatus.error(Messages.XMLPage_errorMessageNoRootElementName);
            }
            return ValidationStatus.ok();
        }
    });
    _binding2 = context.bindValue(comboWidgetValue, comboModelValue, combostrategy, null);
    ControlDecorationSupport.create(_binding2, decoratorPosition, _xmlRootsCombo.getControl().getParent());

    listenForValidationChanges();
}