org.eclipse.osbp.runtime.web.ecview.presentation.vaadin/src/org/eclipse/osbp/runtime/web/ecview/presentation/vaadin/internal/BeanReferenceFieldPresentation.java - osbp/org.eclipse.osbp.runtime.web - Git at Google

 /**
  * Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
  * 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:
  *         Florian Pirchner - Initial implementation
  */
 package org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal;

 import java.util.Locale;

 import org.eclipse.core.databinding.observable.IObservable;
 import org.eclipse.core.databinding.observable.value.IObservableValue;
 import org.eclipse.emf.databinding.EMFObservables;
 import org.eclipse.osbp.ecview.core.common.beans.InMemoryBeanProvider;
 import org.eclipse.osbp.ecview.core.common.editpart.IElementEditpart;
 import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableBindingEndpoint;
 import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableValueEndpoint;
 import org.eclipse.osbp.ecview.core.extension.model.extension.ExtensionModelPackage;
 import org.eclipse.osbp.ecview.core.extension.model.extension.YBeanReferenceField;
 import org.eclipse.osbp.ecview.core.ui.core.editparts.extension.IBeanReferenceFieldEditpart;
 import org.eclipse.osbp.runtime.common.annotations.TargetEnumConstraints;
 import org.eclipse.osbp.runtime.common.state.ISharedStateContext;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.AbstractFieldWidgetPresenter;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.util.Util;
 import org.eclipse.osbp.runtime.web.vaadin.common.data.IBeanSearchService;
 import org.eclipse.osbp.runtime.web.vaadin.common.data.IBeanSearchServiceFactory;
 import org.eclipse.osbp.runtime.web.vaadin.common.data.StatefulInMemoryBeanSearchService;
 import org.eclipse.osbp.runtime.web.vaadin.common.services.filter.AnnotationToVaadinFilterConverter;
 import org.eclipse.osbp.runtime.web.vaadin.components.fields.BeanReferenceField;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import com.vaadin.data.Container.Filter;
 import com.vaadin.server.ErrorMessage;
 import com.vaadin.server.Resource;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.ComponentContainer;
 import com.vaadin.ui.Field;

 // TODO: Auto-generated Javadoc
 /**
  * This presenter is responsible to render a text field on the given layout.
  */
 public class BeanReferenceFieldPresentation extends AbstractFieldWidgetPresenter<Component> {

 	/** The Constant LOGGER. */
 	private static final Logger LOGGER = LoggerFactory.getLogger(BeanReferenceFieldPresentation.class);

 	/** The model access. */
 	private final ModelAccess modelAccess;

 	/** The field. */
 	private CustomField<?> field;

 	/**
 	 * Constructor.
 	 *
 	 * @param editpart
 	 *            The editpart of that presenter
 	 */
 	public BeanReferenceFieldPresentation(IElementEditpart editpart) {
 		super((IBeanReferenceFieldEditpart) editpart);
 		this.modelAccess = new ModelAccess((YBeanReferenceField) editpart.getModel());
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	@Override
 	public Component doCreateWidget(Object parent) {
 		if (field == null) {
 			IBeanSearchServiceFactory searchServiceFactory = getViewContext().getService(IBeanSearchServiceFactory.class.getName());

 			IBeanSearchService<?> service = getSearchService(searchServiceFactory);
 			ISharedStateContext sharedState = getViewContext().getService(ISharedStateContext.class.getName());
 			field = new CustomField(getEditpart().getId(), "", modelAccess.yField.getType(), service, createFilter(), sharedState);

 			field.addStyleName(CSS_CLASS_CONTROL);
 			field.setNullRepresentation("");
 			field.setImmediate(true);
 			setupComponent(field, getCastedModel());
 			String captionPropertyPath = modelAccess.yField.getCaptionPropertyPath();
 			if (captionPropertyPath == null || captionPropertyPath.isEmpty()) {
 				captionPropertyPath = modelAccess.yField.getDescriptionProperty();
 			}
 			field.setItemCaptionPropertyId(captionPropertyPath);
 			field.setItemIconPropertyId(modelAccess.yField.getImagePropertyPath());

 			associateWidget(field, modelAccess.yField);
 			if (modelAccess.isCssIdValid()) {
 				field.setId(modelAccess.getCssID());
 			} else {
 				field.setId(getEditpart().getId());
 			}

 			field.setNullSelectionAllowed(!modelAccess.yField.isRequired());

 			// creates the binding for the field
 			createBindings(modelAccess.yField, field);

 			if (modelAccess.isCssClassValid()) {
 				field.addStyleName(modelAccess.getCssClass());
 			}

 			applyCaptions();

 			initializeField(field);
 		}
 		return field;
 	}

 	/**
 	 * Creates a vaadin filter for the field annotations.
 	 *
 	 * @return the filter
 	 */
 	protected Filter createFilter() {
 		Class<?> sourceType = modelAccess.yField.getReferenceSourceType();
 		String sourceProperty = modelAccess.yField.getReferenceSourceTypeProperty();
 		if (sourceType == null || sourceProperty == null || sourceProperty.equals("")) {
 			return null;
 		}

 		try {
 			java.lang.reflect.Field sourceField = sourceType.getDeclaredField(sourceProperty);

 			TargetEnumConstraints annotation = sourceField.getAnnotation(TargetEnumConstraints.class);
 			if (annotation != null) {
 				return AnnotationToVaadinFilterConverter.createFilter(annotation);
 			}

 		} catch (Exception e) {
 			LOGGER.warn("{}", e);
 			return null;
 		}

 		return null;
 	}

 	/**
 	 * Returns the bean search service.
 	 *
 	 * @param searchServiceFactory
 	 *            the search service factory
 	 * @return the search service
 	 */
 	@SuppressWarnings({ "rawtypes", "unchecked" })
 	protected IBeanSearchService<?> getSearchService(IBeanSearchServiceFactory searchServiceFactory) {
 		IBeanSearchService<?> service = null;
 		Class<? extends InMemoryBeanProvider> inMemoryProviderClass = (Class<? extends InMemoryBeanProvider>) modelAccess.yField
 				.getInMemoryBeanProvider();
 		if (inMemoryProviderClass != null) {
 			try {
 				InMemoryBeanProvider provider = inMemoryProviderClass.newInstance();
 				StatefulInMemoryBeanSearchService tempService = new StatefulInMemoryBeanSearchService(modelAccess.yField.getType());
 				tempService.addBeans(provider.getBeans());
 				service = tempService;
 			} catch (InstantiationException e) {
 				LOGGER.error("{}", e);
 			} catch (IllegalAccessException e) {
 				LOGGER.error("{}", e);
 			}
 		}
 		if (service == null) {
 			service = searchServiceFactory.createService(modelAccess.yField.getType());
 		}
 		return service;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractVaadinWidgetPresenter#doUpdateLocale(java.util.Locale)
 	 */
 	@Override
 	protected void doUpdateLocale(Locale locale) {
 		// no need to set the locale to the ui elements. Is handled by vaadin
 		// internally.

 		// update the captions
 		applyCaptions();
 	}

 	/**
 	 * Applies the labels to the widgets.
 	 */
 	protected void applyCaptions() {
 		Util.applyCaptions(getI18nService(), modelAccess.getLabel(), modelAccess.getLabelI18nKey(), getLocale(), field);
 		Util.applyCaptionIcons(getI18nService(), getResourceProvider(), modelAccess.getLabelI18nKey(), getLocale(),
 				new Util.ResourceCallback() {
 					@Override
 					public void setIcon(Resource resource) {
 						field.setSearchButtonIcon(resource);
 					}
 				});
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractFieldWidgetPresenter#doGetField()
 	 */
 	@Override
 	protected Field<?> doGetField() {
 		return field;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractVaadinWidgetPresenter
 	 * #internalGetObservableEndpoint(org.eclipse.osbp
 	 * .ecview.core.common.model.core.YEmbeddableBindingEndpoint)
 	 */
 	@Override
 	protected IObservable internalGetObservableEndpoint(YEmbeddableBindingEndpoint bindableValue) {
 		if (bindableValue == null) {
 			throw new IllegalArgumentException("BindableValue must not be null!");
 		}

 		if (bindableValue instanceof YEmbeddableValueEndpoint) {
 			return internalGetValueEndpoint();
 		}
 		throw new IllegalArgumentException("Not a valid input: " + bindableValue);
 	}

 	/**
 	 * Returns the observable to observe value.
 	 *
 	 * @return the i observable value
 	 */
 	protected IObservableValue internalGetValueEndpoint() {
 		// return the observable value for text
 		return EMFObservables.observeValue(castEObject(getModel()), ExtensionModelPackage.Literals.YBEAN_REFERENCE_FIELD__VALUE);
 	}

 	/**
 	 * Creates the bindings for the given values.
 	 *
 	 * @param yField
 	 *            the y field
 	 * @param field
 	 *            the field
 	 */
 	protected void createBindings(YBeanReferenceField yField, BeanReferenceField<?> field) {
 		// create the model binding from ridget to ECView-model
 		registerBinding(createBindings_Value(castEObject(getModel()), ExtensionModelPackage.Literals.YBEAN_REFERENCE_FIELD__VALUE, field));

 		super.createBindings(yField, field, null);
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see
 	 * org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
 	 * getWidget()
 	 */
 	@Override
 	public Component getWidget() {
 		return field;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see
 	 * org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
 	 * isRendered()
 	 */
 	@Override
 	public boolean isRendered() {
 		return field != null;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@Override
 	public void doUnrender() {
 		if (field != null) {

 			// unbind all active bindings
 			unbind();

 			Component parent = ((Component) field.getParent());
 			if (parent != null && parent instanceof ComponentContainer) {
 				((ComponentContainer) parent).removeComponent(field);
 			}

 			// remove assocations
 			unassociateWidget(field);

 			if (field.getInternalComboBox() != null) {
 				unassociateWidget(field.getInternalComboBox());
 			}

 			field = null;
 		}
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@Override
 	protected void internalDispose() {
 		try {
 			unrender();
 		} finally {
 			super.internalDispose();
 		}
 	}

 	/**
 	 * A helper class.
 	 */
 	private static class ModelAccess {

 		/** The y field. */
 		private final YBeanReferenceField yField;

 		/**
 		 * Instantiates a new model access.
 		 *
 		 * @param yField
 		 *            the y field
 		 */
 		public ModelAccess(YBeanReferenceField yField) {
 			super();
 			this.yField = yField;
 		}

 		/**
 		 * Gets the css class.
 		 *
 		 * @return the css class
 		 * @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssClass()
 		 */
 		public String getCssClass() {
 			return yField.getCssClass();
 		}

 		/**
 		 * Returns true, if the css class is not null and not empty.
 		 *
 		 * @return true, if is css class valid
 		 */
 		public boolean isCssClassValid() {
 			return getCssClass() != null && !getCssClass().equals("");
 		}

 		/**
 		 * Gets the css id.
 		 *
 		 * @return the css id
 		 * @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssID()
 		 */
 		public String getCssID() {
 			return yField.getCssID();
 		}

 		/**
 		 * Returns true, if the css id is not null and not empty.
 		 *
 		 * @return true, if is css id valid
 		 */
 		public boolean isCssIdValid() {
 			return getCssID() != null && !getCssID().equals("");
 		}

 		/**
 		 * Returns the label.
 		 *
 		 * @return the label
 		 */
 		public String getLabel() {
 			return yField.getDatadescription() != null ? yField.getDatadescription().getLabel() : null;
 		}

 		/**
 		 * Returns the label.
 		 *
 		 * @return the label i18n key
 		 */
 		public String getLabelI18nKey() {
 			return yField.getDatadescription() != null ? yField.getDatadescription().getLabelI18nKey() : null;
 		}
 	}

 	/**
 	 * The Class CustomField.
 	 *
 	 * @param <M>
 	 *            the generic type
 	 */
 	@SuppressWarnings("serial")
 	private class CustomField<M> extends BeanReferenceField<M> {

 		/**
 		 * Instantiates a new custom field.
 		 *
 		 * @param id
 		 *            the id
 		 * @param propertyId
 		 *            the property id
 		 * @param type
 		 *            the type
 		 * @param searchService
 		 *            the search service
 		 * @param filter
 		 *            the filter
 		 * @param sharedState
 		 *            the shared state
 		 */
 		public CustomField(String id, Object propertyId, Class<M> type, IBeanSearchService<M> searchService, Filter filter,
 				ISharedStateContext sharedState) {
 			super(id, propertyId, type, searchService, filter, sharedState);
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see
 		 * org.eclipse.osbp.runtime.web.vaadin.components.fields.BeanReferenceField
 		 * #initContent()
 		 */
 		@Override
 		protected Component initContent() {
 			Component result = super.initContent();

 			associateWidget(field.getInternalComboBox(), getCastedModel());

 			return result;
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see com.vaadin.ui.AbstractField#getErrorMessage()
 		 */
 		@Override
 		public ErrorMessage getErrorMessage() {
 			if (isDisposed()) {
 				// after disposal, Vaadin will call this method once.
 				return null;
 			}

 			ErrorMessage message = super.getErrorMessage();
 			reportValidationError(message);
 			return message;
 		}
 	}
 }
	/**
	* Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
	* 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:
	* Florian Pirchner - Initial implementation
	*/
	package org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal;

	import java.util.Locale;

	import org.eclipse.core.databinding.observable.IObservable;
	import org.eclipse.core.databinding.observable.value.IObservableValue;
	import org.eclipse.emf.databinding.EMFObservables;
	import org.eclipse.osbp.ecview.core.common.beans.InMemoryBeanProvider;
	import org.eclipse.osbp.ecview.core.common.editpart.IElementEditpart;
	import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableBindingEndpoint;
	import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableValueEndpoint;
	import org.eclipse.osbp.ecview.core.extension.model.extension.ExtensionModelPackage;
	import org.eclipse.osbp.ecview.core.extension.model.extension.YBeanReferenceField;
	import org.eclipse.osbp.ecview.core.ui.core.editparts.extension.IBeanReferenceFieldEditpart;
	import org.eclipse.osbp.runtime.common.annotations.TargetEnumConstraints;
	import org.eclipse.osbp.runtime.common.state.ISharedStateContext;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.AbstractFieldWidgetPresenter;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.util.Util;
	import org.eclipse.osbp.runtime.web.vaadin.common.data.IBeanSearchService;
	import org.eclipse.osbp.runtime.web.vaadin.common.data.IBeanSearchServiceFactory;
	import org.eclipse.osbp.runtime.web.vaadin.common.data.StatefulInMemoryBeanSearchService;
	import org.eclipse.osbp.runtime.web.vaadin.common.services.filter.AnnotationToVaadinFilterConverter;
	import org.eclipse.osbp.runtime.web.vaadin.components.fields.BeanReferenceField;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import com.vaadin.data.Container.Filter;
	import com.vaadin.server.ErrorMessage;
	import com.vaadin.server.Resource;
	import com.vaadin.ui.Component;
	import com.vaadin.ui.ComponentContainer;
	import com.vaadin.ui.Field;

	// TODO: Auto-generated Javadoc
	/**
	* This presenter is responsible to render a text field on the given layout.
	*/
	public class BeanReferenceFieldPresentation extends AbstractFieldWidgetPresenter<Component> {

	/** The Constant LOGGER. */
	private static final Logger LOGGER = LoggerFactory.getLogger(BeanReferenceFieldPresentation.class);

	/** The model access. */
	private final ModelAccess modelAccess;

	/** The field. */
	private CustomField<?> field;

	/**
	* Constructor.
	*
	* @param editpart
	* The editpart of that presenter
	*/
	public BeanReferenceFieldPresentation(IElementEditpart editpart) {
	super((IBeanReferenceFieldEditpart) editpart);
	this.modelAccess = new ModelAccess((YBeanReferenceField) editpart.getModel());
	}

	/**
	* {@inheritDoc}
	*/
	@SuppressWarnings({ "unchecked", "rawtypes" })
	@Override
	public Component doCreateWidget(Object parent) {
	if (field == null) {
	IBeanSearchServiceFactory searchServiceFactory = getViewContext().getService(IBeanSearchServiceFactory.class.getName());

	IBeanSearchService<?> service = getSearchService(searchServiceFactory);
	ISharedStateContext sharedState = getViewContext().getService(ISharedStateContext.class.getName());
	field = new CustomField(getEditpart().getId(), "", modelAccess.yField.getType(), service, createFilter(), sharedState);

	field.addStyleName(CSS_CLASS_CONTROL);
	field.setNullRepresentation("");
	field.setImmediate(true);
	setupComponent(field, getCastedModel());
	String captionPropertyPath = modelAccess.yField.getCaptionPropertyPath();
	if (captionPropertyPath == null \|\| captionPropertyPath.isEmpty()) {
	captionPropertyPath = modelAccess.yField.getDescriptionProperty();
	}
	field.setItemCaptionPropertyId(captionPropertyPath);
	field.setItemIconPropertyId(modelAccess.yField.getImagePropertyPath());

	associateWidget(field, modelAccess.yField);
	if (modelAccess.isCssIdValid()) {
	field.setId(modelAccess.getCssID());
	} else {
	field.setId(getEditpart().getId());
	}

	field.setNullSelectionAllowed(!modelAccess.yField.isRequired());

	// creates the binding for the field
	createBindings(modelAccess.yField, field);

	if (modelAccess.isCssClassValid()) {
	field.addStyleName(modelAccess.getCssClass());
	}

	applyCaptions();

	initializeField(field);
	}
	return field;
	}

	/**
	* Creates a vaadin filter for the field annotations.
	*
	* @return the filter
	*/
	protected Filter createFilter() {
	Class<?> sourceType = modelAccess.yField.getReferenceSourceType();
	String sourceProperty = modelAccess.yField.getReferenceSourceTypeProperty();
	if (sourceType == null \|\| sourceProperty == null \|\| sourceProperty.equals("")) {
	return null;
	}

	try {
	java.lang.reflect.Field sourceField = sourceType.getDeclaredField(sourceProperty);

	TargetEnumConstraints annotation = sourceField.getAnnotation(TargetEnumConstraints.class);
	if (annotation != null) {
	return AnnotationToVaadinFilterConverter.createFilter(annotation);
	}

	} catch (Exception e) {
	LOGGER.warn("{}", e);
	return null;
	}

	return null;
	}

	/**
	* Returns the bean search service.
	*
	* @param searchServiceFactory
	* the search service factory
	* @return the search service
	*/
	@SuppressWarnings({ "rawtypes", "unchecked" })
	protected IBeanSearchService<?> getSearchService(IBeanSearchServiceFactory searchServiceFactory) {
	IBeanSearchService<?> service = null;
	Class<? extends InMemoryBeanProvider> inMemoryProviderClass = (Class<? extends InMemoryBeanProvider>) modelAccess.yField
	.getInMemoryBeanProvider();
	if (inMemoryProviderClass != null) {
	try {
	InMemoryBeanProvider provider = inMemoryProviderClass.newInstance();
	StatefulInMemoryBeanSearchService tempService = new StatefulInMemoryBeanSearchService(modelAccess.yField.getType());
	tempService.addBeans(provider.getBeans());
	service = tempService;
	} catch (InstantiationException e) {
	LOGGER.error("{}", e);
	} catch (IllegalAccessException e) {
	LOGGER.error("{}", e);
	}
	}
	if (service == null) {
	service = searchServiceFactory.createService(modelAccess.yField.getType());
	}
	return service;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractVaadinWidgetPresenter#doUpdateLocale(java.util.Locale)
	*/
	@Override
	protected void doUpdateLocale(Locale locale) {
	// no need to set the locale to the ui elements. Is handled by vaadin
	// internally.

	// update the captions
	applyCaptions();
	}

	/**
	* Applies the labels to the widgets.
	*/
	protected void applyCaptions() {
	Util.applyCaptions(getI18nService(), modelAccess.getLabel(), modelAccess.getLabelI18nKey(), getLocale(), field);
	Util.applyCaptionIcons(getI18nService(), getResourceProvider(), modelAccess.getLabelI18nKey(), getLocale(),
	new Util.ResourceCallback() {
	@Override
	public void setIcon(Resource resource) {
	field.setSearchButtonIcon(resource);
	}
	});
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractFieldWidgetPresenter#doGetField()
	*/
	@Override
	protected Field<?> doGetField() {
	return field;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractVaadinWidgetPresenter
	* #internalGetObservableEndpoint(org.eclipse.osbp
	* .ecview.core.common.model.core.YEmbeddableBindingEndpoint)
	*/
	@Override
	protected IObservable internalGetObservableEndpoint(YEmbeddableBindingEndpoint bindableValue) {
	if (bindableValue == null) {
	throw new IllegalArgumentException("BindableValue must not be null!");
	}

	if (bindableValue instanceof YEmbeddableValueEndpoint) {
	return internalGetValueEndpoint();
	}
	throw new IllegalArgumentException("Not a valid input: " + bindableValue);
	}

	/**
	* Returns the observable to observe value.
	*
	* @return the i observable value
	*/
	protected IObservableValue internalGetValueEndpoint() {
	// return the observable value for text
	return EMFObservables.observeValue(castEObject(getModel()), ExtensionModelPackage.Literals.YBEAN_REFERENCE_FIELD__VALUE);
	}

	/**
	* Creates the bindings for the given values.
	*
	* @param yField
	* the y field
	* @param field
	* the field
	*/
	protected void createBindings(YBeanReferenceField yField, BeanReferenceField<?> field) {
	// create the model binding from ridget to ECView-model
	registerBinding(createBindings_Value(castEObject(getModel()), ExtensionModelPackage.Literals.YBEAN_REFERENCE_FIELD__VALUE, field));

	super.createBindings(yField, field, null);
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
	* getWidget()
	*/
	@Override
	public Component getWidget() {
	return field;
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
	* isRendered()
	*/
	@Override
	public boolean isRendered() {
	return field != null;
	}

	/**
	* {@inheritDoc}
	*/
	@Override
	public void doUnrender() {
	if (field != null) {

	// unbind all active bindings
	unbind();

	Component parent = ((Component) field.getParent());
	if (parent != null && parent instanceof ComponentContainer) {
	((ComponentContainer) parent).removeComponent(field);
	}

	// remove assocations
	unassociateWidget(field);

	if (field.getInternalComboBox() != null) {
	unassociateWidget(field.getInternalComboBox());
	}

	field = null;
	}
	}

	/**
	* {@inheritDoc}
	*/
	@Override
	protected void internalDispose() {
	try {
	unrender();
	} finally {
	super.internalDispose();
	}
	}

	/**
	* A helper class.
	*/
	private static class ModelAccess {

	/** The y field. */
	private final YBeanReferenceField yField;

	/**
	* Instantiates a new model access.
	*
	* @param yField
	* the y field
	*/
	public ModelAccess(YBeanReferenceField yField) {
	super();
	this.yField = yField;
	}

	/**
	* Gets the css class.
	*
	* @return the css class
	* @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssClass()
	*/
	public String getCssClass() {
	return yField.getCssClass();
	}

	/**
	* Returns true, if the css class is not null and not empty.
	*
	* @return true, if is css class valid
	*/
	public boolean isCssClassValid() {
	return getCssClass() != null && !getCssClass().equals("");
	}

	/**
	* Gets the css id.
	*
	* @return the css id
	* @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssID()
	*/
	public String getCssID() {
	return yField.getCssID();
	}

	/**
	* Returns true, if the css id is not null and not empty.
	*
	* @return true, if is css id valid
	*/
	public boolean isCssIdValid() {
	return getCssID() != null && !getCssID().equals("");
	}

	/**
	* Returns the label.
	*
	* @return the label
	*/
	public String getLabel() {
	return yField.getDatadescription() != null ? yField.getDatadescription().getLabel() : null;
	}

	/**
	* Returns the label.
	*
	* @return the label i18n key
	*/
	public String getLabelI18nKey() {
	return yField.getDatadescription() != null ? yField.getDatadescription().getLabelI18nKey() : null;
	}
	}

	/**
	* The Class CustomField.
	*
	* @param <M>
	* the generic type
	*/
	@SuppressWarnings("serial")
	private class CustomField<M> extends BeanReferenceField<M> {

	/**
	* Instantiates a new custom field.
	*
	* @param id
	* the id
	* @param propertyId
	* the property id
	* @param type
	* the type
	* @param searchService
	* the search service
	* @param filter
	* the filter
	* @param sharedState
	* the shared state
	*/
	public CustomField(String id, Object propertyId, Class<M> type, IBeanSearchService<M> searchService, Filter filter,
	ISharedStateContext sharedState) {
	super(id, propertyId, type, searchService, filter, sharedState);
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.osbp.runtime.web.vaadin.components.fields.BeanReferenceField
	* #initContent()
	*/
	@Override
	protected Component initContent() {
	Component result = super.initContent();

	associateWidget(field.getInternalComboBox(), getCastedModel());

	return result;
	}

	/*
	* (non-Javadoc)
	*
	* @see com.vaadin.ui.AbstractField#getErrorMessage()
	*/
	@Override
	public ErrorMessage getErrorMessage() {
	if (isDisposed()) {
	// after disposal, Vaadin will call this method once.
	return null;
	}

	ErrorMessage message = super.getErrorMessage();
	reportValidationError(message);
	return message;
	}
	}
	}