org.eclipse.osbp.runtime.web.ecview.presentation.vaadin/src/org/eclipse/osbp/runtime/web/ecview/presentation/vaadin/internal/EnumComboBoxPresentation.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 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *         Florian Pirchner - Initial implementation
  */
 package org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal;

 import java.util.Locale;
 import java.util.regex.Pattern;

 import org.eclipse.core.databinding.observable.IObservable;
 import org.eclipse.core.databinding.observable.list.IObservableList;
 import org.eclipse.core.databinding.observable.value.IObservableValue;
 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.YEmbeddableCollectionEndpoint;
 import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableSelectionEndpoint;
 import org.eclipse.osbp.ecview.core.databinding.emf.model.ECViewModelBindable;
 import org.eclipse.osbp.ecview.core.extension.model.extension.ExtensionModelPackage;
 import org.eclipse.osbp.ecview.core.extension.model.extension.YEnumComboBox;
 import org.eclipse.osbp.ecview.core.ui.core.editparts.extension.IEnumComboBoxEditpart;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.AbstractFieldWidgetPresenter;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.ClassLoaderResource;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.data.EnumConverter;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.data.EnumOptionBean;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.data.EnumOptionBeanHelper;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.util.Util;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import com.vaadin.data.Property;
 import com.vaadin.data.util.BeanItemContainer;
 import com.vaadin.data.util.ObjectProperty;
 import com.vaadin.data.util.converter.Converter;
 import com.vaadin.server.ErrorMessage;
 import com.vaadin.server.Resource;
 import com.vaadin.server.ThemeResource;
 import com.vaadin.ui.AbstractSelect.ItemCaptionMode;
 import com.vaadin.ui.ComboBox;
 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 combo box on the given layout.
  */
 @SuppressWarnings("restriction")
 public class EnumComboBoxPresentation extends AbstractFieldWidgetPresenter<Component> {

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

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

 	/** The combo. */
 	private ComboBox combo;

 	/** The property. */
 	@SuppressWarnings("rawtypes")
 	private ObjectProperty property;

 	private ClassLoader enumTypeLoader;

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

 	/**
 	 * {@inheritDoc}
 	 */
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	@Override
 	public Component doCreateWidget(Object parent) {
 		if (combo == null) {

 			combo = new CustomComboBox();
 			combo.addStyleName(CSS_CLASS_CONTROL);
 			combo.setImmediate(true);

 			setupComponent(combo, getCastedModel());

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

 			try {
 				property = new ObjectProperty(null, modelAccess.yField.getType());
 				combo.setPropertyDataSource(property);

 				enumTypeLoader = modelAccess.yField.getType().getClassLoader();

 				if (modelAccess.yField.getType() != null) {
 					BeanItemContainer<EnumOptionBean> datasource = createDatasource(
 							(Class<? extends Enum<?>>) modelAccess.yField.getType());
 					combo.setContainerDataSource(datasource);
 				}

 				combo.setConverter(getConverter());

 				combo.setItemCaptionPropertyId("description");
 				combo.setItemCaptionMode(ItemCaptionMode.PROPERTY);
 				combo.setItemIconPropertyId("imagePath");

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

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

 				applyCaptions();

 				initializeField(combo);
 			} catch (Exception e) {
 				LOGGER.error("{}", e);
 			}
 		}
 		return combo;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractFieldWidgetPresenter#getDefaultConverter()
 	 */
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	@Override
 	protected Converter getDefaultConverter() {
 		if (combo == null) {
 			return null;
 		}

 		return new EnumConverter((Class<Enum<?>>) modelAccess.yField.getType(), combo);
 	}

 	/**
 	 * Creates the datasource used for the enum field.
 	 *
 	 * @param enumClass
 	 *            the enum class
 	 * @return the bean item container
 	 */
 	protected BeanItemContainer<EnumOptionBean> createDatasource(Class<? extends Enum<?>> enumClass) {
 		BeanItemContainer<EnumOptionBean> datasource = new BeanItemContainer<EnumOptionBean>(EnumOptionBean.class);
 		datasource.addAll(EnumOptionBeanHelper.getBeans(enumClass, getI18nService(), getLocale()));
 		return datasource;
 	}

 	/*
 	 * (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.
 	 */
 	@SuppressWarnings("unchecked")
 	protected void applyCaptions() {
 		Util.applyCaptions(getI18nService(), modelAccess.getLabel(), modelAccess.getLabelI18nKey(), getLocale(), combo);

 		EnumOptionBeanHelper.updateLocale((BeanItemContainer<EnumOptionBean>) combo.getContainerDataSource(),
 				getI18nService(), getLocale());
 	}

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

 	/*
 	 * (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 YEmbeddableCollectionEndpoint) {
 			return internalGetCollectionEndpoint();
 		} else if (bindableValue instanceof YEmbeddableSelectionEndpoint) {
 			return internalGetSelectionEndpoint((YEmbeddableSelectionEndpoint) bindableValue);
 		}
 		throw new IllegalArgumentException("Not a valid input: " + bindableValue);
 	}

 	/**
 	 * Returns the observable to observe the collection.
 	 *
 	 * @return the i observable list
 	 */
 	protected IObservableList internalGetCollectionEndpoint() {
 		throw new UnsupportedOperationException();
 	}

 	/**
 	 * Returns the observable to observe the selection.
 	 *
 	 * @param yEndpoint
 	 *            the y endpoint
 	 * @return the i observable value
 	 */
 	protected IObservableValue internalGetSelectionEndpoint(YEmbeddableSelectionEndpoint yEndpoint) {

 		String attributePath = ECViewModelBindable
 				.getAttributePath(ExtensionModelPackage.Literals.YCOMBO_BOX__SELECTION, yEndpoint.getAttributePath());

 		// return the observable value for text
 		return ECViewModelBindable.observeValue(castEObject(getModel()), attributePath, modelAccess.yField.getType(),
 				modelAccess.yField.getEmfNsURI());
 	}

 	/**
 	 * Creates the bindings for the given values.
 	 *
 	 * @param yField
 	 *            the y field
 	 * @param field
 	 *            the field
 	 */
 	protected void createBindings(YEnumComboBox yField, ComboBox field) {
 		// create the model binding from ridget to ECView-model
 		registerBinding(createBindingsSelection(castEObject(getModel()),
 				ExtensionModelPackage.Literals.YENUM_COMBO_BOX__SELECTION, field, yField.getType()));

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

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

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

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

 			// unbind all active bindings
 			unbind();

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

 			// remove assocations
 			unassociateWidget(combo);

 			combo = null;
 		}
 	}

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

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

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

 		/**
 		 * Instantiates a new model access.
 		 *
 		 * @param yField
 		 *            the y field
 		 */
 		public ModelAccess(YEnumComboBox 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;
 		}
 	}

 	/**
 	 * Converts the string value of the item icon property to
 	 * {@link ThemeResource}.
 	 */
 	@SuppressWarnings("serial")
 	private class CustomComboBox extends ComboBox {

 		/** The item icon property id. */
 		private Object itemIconPropertyId;

 		/**
 		 * Instantiates a new custom combo box.
 		 */
 		public CustomComboBox() {
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see com.vaadin.ui.AbstractSelect#getType()
 		 */
 		@Override
 		public Class<?> getType() {
 			return EnumOptionBean.class;
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see
 		 * com.vaadin.ui.AbstractSelect#setItemIconPropertyId(java.lang.Object)
 		 */
 		@Override
 		public void setItemIconPropertyId(Object propertyId) throws IllegalArgumentException {
 			if (propertyId == null) {
 				super.setItemIconPropertyId(propertyId);
 			} else if (!getContainerPropertyIds().contains(propertyId)) {
 				super.setItemIconPropertyId(propertyId);
 			} else if (String.class.isAssignableFrom(getType(propertyId))) {
 				itemIconPropertyId = propertyId;
 			} else {
 				super.setItemIconPropertyId(propertyId);
 			}
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see com.vaadin.ui.AbstractSelect#getItemIconPropertyId()
 		 */
 		public Object getItemIconPropertyId() {
 			return itemIconPropertyId != null ? itemIconPropertyId : super.getItemIconPropertyId();
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see com.vaadin.ui.AbstractSelect#getItemIcon(java.lang.Object)
 		 */
 		public Resource getItemIcon(Object itemId) {
 			if (itemIconPropertyId == null) {
 				return super.getItemIcon(itemId);
 			} else {
 				final Property<?> ip = getContainerProperty(itemId, getItemIconPropertyId());
 				if (ip == null) {
 					return null;
 				}
 				final Object icon = ip.getValue();
 				try {
 					if (icon instanceof String) {
 						String[] parts = ((String) icon).split(Pattern.quote("."));
 						StringBuilder iconPath = new StringBuilder();
 						iconPath.append("enums/");
 						iconPath.append(parts[0]);
 						iconPath.append("/");
 						iconPath.append(parts[1].toLowerCase());
 						iconPath.append(".png");
 						return new ClassLoaderResource(enumTypeLoader, iconPath.toString());
 					}
 				} catch (Exception e) {
 					LOGGER.debug(e.getLocalizedMessage());
 				}
 			}
 			return null;
 		}

 		/*
 		 * (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 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Florian Pirchner - Initial implementation
	*/
	package org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal;

	import java.util.Locale;
	import java.util.regex.Pattern;

	import org.eclipse.core.databinding.observable.IObservable;
	import org.eclipse.core.databinding.observable.list.IObservableList;
	import org.eclipse.core.databinding.observable.value.IObservableValue;
	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.YEmbeddableCollectionEndpoint;
	import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableSelectionEndpoint;
	import org.eclipse.osbp.ecview.core.databinding.emf.model.ECViewModelBindable;
	import org.eclipse.osbp.ecview.core.extension.model.extension.ExtensionModelPackage;
	import org.eclipse.osbp.ecview.core.extension.model.extension.YEnumComboBox;
	import org.eclipse.osbp.ecview.core.ui.core.editparts.extension.IEnumComboBoxEditpart;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.AbstractFieldWidgetPresenter;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.ClassLoaderResource;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.data.EnumConverter;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.data.EnumOptionBean;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.data.EnumOptionBeanHelper;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.util.Util;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import com.vaadin.data.Property;
	import com.vaadin.data.util.BeanItemContainer;
	import com.vaadin.data.util.ObjectProperty;
	import com.vaadin.data.util.converter.Converter;
	import com.vaadin.server.ErrorMessage;
	import com.vaadin.server.Resource;
	import com.vaadin.server.ThemeResource;
	import com.vaadin.ui.AbstractSelect.ItemCaptionMode;
	import com.vaadin.ui.ComboBox;
	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 combo box on the given layout.
	*/
	@SuppressWarnings("restriction")
	public class EnumComboBoxPresentation extends AbstractFieldWidgetPresenter<Component> {

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

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

	/** The combo. */
	private ComboBox combo;

	/** The property. */
	@SuppressWarnings("rawtypes")
	private ObjectProperty property;

	private ClassLoader enumTypeLoader;

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

	/**
	* {@inheritDoc}
	*/
	@SuppressWarnings({ "unchecked", "rawtypes" })
	@Override
	public Component doCreateWidget(Object parent) {
	if (combo == null) {

	combo = new CustomComboBox();
	combo.addStyleName(CSS_CLASS_CONTROL);
	combo.setImmediate(true);

	setupComponent(combo, getCastedModel());

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

	try {
	property = new ObjectProperty(null, modelAccess.yField.getType());
	combo.setPropertyDataSource(property);

	enumTypeLoader = modelAccess.yField.getType().getClassLoader();

	if (modelAccess.yField.getType() != null) {
	BeanItemContainer<EnumOptionBean> datasource = createDatasource(
	(Class<? extends Enum<?>>) modelAccess.yField.getType());
	combo.setContainerDataSource(datasource);
	}

	combo.setConverter(getConverter());

	combo.setItemCaptionPropertyId("description");
	combo.setItemCaptionMode(ItemCaptionMode.PROPERTY);
	combo.setItemIconPropertyId("imagePath");

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

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

	applyCaptions();

	initializeField(combo);
	} catch (Exception e) {
	LOGGER.error("{}", e);
	}
	}
	return combo;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractFieldWidgetPresenter#getDefaultConverter()
	*/
	@SuppressWarnings({ "unchecked", "rawtypes" })
	@Override
	protected Converter getDefaultConverter() {
	if (combo == null) {
	return null;
	}

	return new EnumConverter((Class<Enum<?>>) modelAccess.yField.getType(), combo);
	}

	/**
	* Creates the datasource used for the enum field.
	*
	* @param enumClass
	* the enum class
	* @return the bean item container
	*/
	protected BeanItemContainer<EnumOptionBean> createDatasource(Class<? extends Enum<?>> enumClass) {
	BeanItemContainer<EnumOptionBean> datasource = new BeanItemContainer<EnumOptionBean>(EnumOptionBean.class);
	datasource.addAll(EnumOptionBeanHelper.getBeans(enumClass, getI18nService(), getLocale()));
	return datasource;
	}

	/*
	* (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.
	*/
	@SuppressWarnings("unchecked")
	protected void applyCaptions() {
	Util.applyCaptions(getI18nService(), modelAccess.getLabel(), modelAccess.getLabelI18nKey(), getLocale(), combo);

	EnumOptionBeanHelper.updateLocale((BeanItemContainer<EnumOptionBean>) combo.getContainerDataSource(),
	getI18nService(), getLocale());
	}

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

	/*
	* (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 YEmbeddableCollectionEndpoint) {
	return internalGetCollectionEndpoint();
	} else if (bindableValue instanceof YEmbeddableSelectionEndpoint) {
	return internalGetSelectionEndpoint((YEmbeddableSelectionEndpoint) bindableValue);
	}
	throw new IllegalArgumentException("Not a valid input: " + bindableValue);
	}

	/**
	* Returns the observable to observe the collection.
	*
	* @return the i observable list
	*/
	protected IObservableList internalGetCollectionEndpoint() {
	throw new UnsupportedOperationException();
	}

	/**
	* Returns the observable to observe the selection.
	*
	* @param yEndpoint
	* the y endpoint
	* @return the i observable value
	*/
	protected IObservableValue internalGetSelectionEndpoint(YEmbeddableSelectionEndpoint yEndpoint) {

	String attributePath = ECViewModelBindable
	.getAttributePath(ExtensionModelPackage.Literals.YCOMBO_BOX__SELECTION, yEndpoint.getAttributePath());

	// return the observable value for text
	return ECViewModelBindable.observeValue(castEObject(getModel()), attributePath, modelAccess.yField.getType(),
	modelAccess.yField.getEmfNsURI());
	}

	/**
	* Creates the bindings for the given values.
	*
	* @param yField
	* the y field
	* @param field
	* the field
	*/
	protected void createBindings(YEnumComboBox yField, ComboBox field) {
	// create the model binding from ridget to ECView-model
	registerBinding(createBindingsSelection(castEObject(getModel()),
	ExtensionModelPackage.Literals.YENUM_COMBO_BOX__SELECTION, field, yField.getType()));

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

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

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

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

	// unbind all active bindings
	unbind();

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

	// remove assocations
	unassociateWidget(combo);

	combo = null;
	}
	}

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

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

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

	/**
	* Instantiates a new model access.
	*
	* @param yField
	* the y field
	*/
	public ModelAccess(YEnumComboBox 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;
	}
	}

	/**
	* Converts the string value of the item icon property to
	* {@link ThemeResource}.
	*/
	@SuppressWarnings("serial")
	private class CustomComboBox extends ComboBox {

	/** The item icon property id. */
	private Object itemIconPropertyId;

	/**
	* Instantiates a new custom combo box.
	*/
	public CustomComboBox() {
	}

	/*
	* (non-Javadoc)
	*
	* @see com.vaadin.ui.AbstractSelect#getType()
	*/
	@Override
	public Class<?> getType() {
	return EnumOptionBean.class;
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* com.vaadin.ui.AbstractSelect#setItemIconPropertyId(java.lang.Object)
	*/
	@Override
	public void setItemIconPropertyId(Object propertyId) throws IllegalArgumentException {
	if (propertyId == null) {
	super.setItemIconPropertyId(propertyId);
	} else if (!getContainerPropertyIds().contains(propertyId)) {
	super.setItemIconPropertyId(propertyId);
	} else if (String.class.isAssignableFrom(getType(propertyId))) {
	itemIconPropertyId = propertyId;
	} else {
	super.setItemIconPropertyId(propertyId);
	}
	}

	/*
	* (non-Javadoc)
	*
	* @see com.vaadin.ui.AbstractSelect#getItemIconPropertyId()
	*/
	public Object getItemIconPropertyId() {
	return itemIconPropertyId != null ? itemIconPropertyId : super.getItemIconPropertyId();
	}

	/*
	* (non-Javadoc)
	*
	* @see com.vaadin.ui.AbstractSelect#getItemIcon(java.lang.Object)
	*/
	public Resource getItemIcon(Object itemId) {
	if (itemIconPropertyId == null) {
	return super.getItemIcon(itemId);
	} else {
	final Property<?> ip = getContainerProperty(itemId, getItemIconPropertyId());
	if (ip == null) {
	return null;
	}
	final Object icon = ip.getValue();
	try {
	if (icon instanceof String) {
	String[] parts = ((String) icon).split(Pattern.quote("."));
	StringBuilder iconPath = new StringBuilder();
	iconPath.append("enums/");
	iconPath.append(parts[0]);
	iconPath.append("/");
	iconPath.append(parts[1].toLowerCase());
	iconPath.append(".png");
	return new ClassLoaderResource(enumTypeLoader, iconPath.toString());
	}
	} catch (Exception e) {
	LOGGER.debug(e.getLocalizedMessage());
	}
	}
	return null;
	}

	/*
	* (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;
	}
	}
	}