org.eclipse.osbp.xtext.dialogdsl/src/org/eclipse/osbp/xtext/dialogdsl/common/AbstractECViewDisplay.java

/**
 *                                                                            
 * Copyright (c) 2011, 2016 - 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:   
 * Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation 
 */
package org.eclipse.osbp.xtext.dialogdsl.common;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

import javax.inject.Inject;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.osbp.ecview.core.common.context.IViewContext;
import org.eclipse.osbp.ecview.core.common.model.core.YView;
import org.eclipse.osbp.ecview.extension.model.YStrategyLayout;
import org.eclipse.osbp.ecview.extension.presentation.vaadin.components.common.ECViewComponent;
import org.eclipse.osbp.runtime.common.annotations.DtoUtils;
import org.eclipse.osbp.ui.api.customfields.IBlobService;
import org.eclipse.osbp.ui.api.metadata.IDSLMetadataService;
import org.eclipse.osbp.ui.api.themes.IThemeResourceService;
import org.eclipse.osbp.vaaclipse.common.ecview.ECViewToE4ServiceBridge;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.vaadin.server.ClientConnector.AttachEvent;
import com.vaadin.server.ClientConnector.AttachListener;
import com.vaadin.server.ClientConnector.DetachEvent;
import com.vaadin.server.ClientConnector.DetachListener;
import com.vaadin.ui.AbstractOrderedLayout;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Notification.Type;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
import org.eclipse.osbp.runtime.common.annotations.DtoUtils;

/**
 * The Class AbstractECViewDialog.
 *
 * @param <DTO>
 *            the generic type
 */
@SuppressWarnings("all")
public abstract class AbstractECViewDisplay<DTO> {

	/** The Constant log. */
	private final static Logger log = LoggerFactory.getLogger("vaaclipseDisplay");

	/** The eclipse context. */
	@Inject
	private IEclipseContext eclipseContext;

	@Inject
	private IDSLMetadataService dslMetadataService;

	@Inject
	private IThemeResourceService themeResourceService;

	@Inject
	private IBlobService blobService;
	
	/** The view context. */
	// ecview stuff
	private IViewContext viewContext;

	/** The ecview component. */
	private ECViewComponent ecviewComponent;

	/** The rendering params. */
	private Map<String, Object> renderingParams;

	private AbstractOrderedLayout parent;

	public AbstractECViewDisplay(UI ui, String fragment) {
	}

	public void handle(VerticalLayout parent, IEclipseContext context) {
		this.parent = parent;
		this.eclipseContext = eclipseContext;
		createView();
	}

	private void createView() {
		ecviewComponent = new ECViewComponent();
		ecviewComponent.setSizeFull();
		parent.addComponent(ecviewComponent);
		renderingParams = createRenderingParams(blobService);
		viewContext = ecviewComponent.setValue(getViewId(), createNew(getBaseDtoName()), renderingParams);
		if (viewContext == null) {
			String message = "ViewContext could not be set for '" + getViewId() + "'";
			log.error(message);
			Notification.show(message, Type.ERROR_MESSAGE);
		} else {
			YView yView = (YView) viewContext.getViewEditpart().getModel();
			if (yView == null) {
				Notification.show("Display could not be found! " + getViewId(), Type.ERROR_MESSAGE);
				return;
			}
			YStrategyLayout yStrategyLayoutT = findLayout(yView);
		}
	}

	public void dispose() {
		removeOldView();
	}
	
	public void sendData(Map<String, Object> data) {
		if (viewContext == null) {
			return;
		}
		Object currentDto = viewContext.getBean(IViewContext.MAIN_BEAN_SLOT);
		if (currentDto != null) {
			for(Entry<String, Object> entry:data.entrySet()) {
				String[] tokens = entry.getKey().split("/");
				if(currentDto.getClass().getCanonicalName().equals(tokens[0])) {
					DtoUtils.setValue(currentDto, tokens[1], entry.getValue()); 
				}
			}
			viewContext.setBean(IViewContext.MAIN_BEAN_SLOT, currentDto);
		}
	}

	/**
	 * Removes the old view.
	 */
	private void removeOldView() {
		if (viewContext != null) {
			viewContext.dispose();
		}
		if (parent.getComponentCount() > 0) {
			parent.removeAllComponents();
		}

	}

	public YStrategyLayout findLayout(YView yView) {

		for (Iterator<EObject> iterator = EcoreUtil
				.getAllContents(yView, false); iterator.hasNext();) {
			EObject type = (EObject) iterator.next();
			if (type instanceof YStrategyLayout) {
				return (YStrategyLayout) type;
			}
		}
		return null;
	}
	/**
	 * Creates the rendering parameters.
	 *
	 * @return the map
	 */
	protected Map<String, Object> createRenderingParams(IBlobService blobService) {
		Map<String, Object> params = new HashMap<String, Object>();
		Map<String, Object> services = new HashMap<String, Object>();
		params.put(IViewContext.PARAM_SERVICES, services);
		params.put(IViewContext.PROP_SLOT, IViewContext.MAIN_BEAN_SLOT);
		params.put(IViewContext.PARAM_THIRDPARTY_SERVICE_PROVIDER, new ECViewToE4ServiceBridge(eclipseContext));
		return params;
	}

	protected Object createNew(String typeName) {
		Object newDto = null;
		Class<?> clazz = null;
		try {
			clazz = dslMetadataService.createType(typeName);
		} catch (ClassNotFoundException e) {
			log.error("{}", e);
			return null;
		}
		try {
			newDto = clazz.newInstance();
		} catch (InstantiationException | IllegalAccessException e) {
			log.error("{}", e);
			return null;
		}
		ecviewComponent.setValue(getViewId(), newDto, renderingParams);
		if (viewContext != null) {
			viewContext.setBean(IViewContext.MAIN_BEAN_SLOT, newDto);
		}
		return newDto;
	}

	/**
	 * Gets the view id.
	 *
	 * @return the view id
	 */
	protected abstract String getViewId();

	/**
	 * Gets the full qualified dto name.
	 *
	 * @return the base class dto name
	 */
	protected abstract String getBaseDtoName();

	/**
	 * Gets the full qualified entity name.
	 *
	 * @return the base class entity name
	 */
	protected abstract String getBaseEntityName();
}