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/**
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* Copyright (C) 2017 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.vaadin.ui.view;
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import java.lang.reflect.Field;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.ParameterizedType;
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import java.lang.reflect.Type;
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import javax.sql.DataSource;
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import org.hibernate.SessionFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.context.ApplicationEventPublisher;
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import org.springframework.context.annotation.Lazy;
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import org.springframework.transaction.PlatformTransactionManager;
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import com.vaadin.spring.annotation.SpringComponent;
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import com.vaadin.spring.annotation.UIScope;
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import eu.etaxonomy.cdm.api.application.CdmRepository;
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import eu.etaxonomy.cdm.vaadin.session.ViewScopeConversationHolder;
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import eu.etaxonomy.vaadin.mvp.AbstractEditorPresenter;
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import eu.etaxonomy.vaadin.mvp.AbstractPopupEditor;
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import eu.etaxonomy.vaadin.mvp.AbstractPresenter;
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import eu.etaxonomy.vaadin.mvp.AbstractView;
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import eu.etaxonomy.vaadin.ui.navigation.NavigationManager;
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/**
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* @author a.kohlbecker
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* @since May 30, 2017
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*
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*/
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@SpringComponent
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@UIScope
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public class PopupEditorFactory {
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@Autowired
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protected ApplicationEventPublisher eventBus;
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@Autowired
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@Qualifier("cdmRepository")
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private CdmRepository repo;
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@Autowired
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private SessionFactory sessionFactory;
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@Autowired
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private DataSource dataSource;
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@Autowired
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private PlatformTransactionManager transactionManager;
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@Autowired
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@Lazy
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private NavigationManager navigationManager;
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private Field presenterRepoField;
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private Field presenterNavigationManagerField;
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private Field presenterEventBusField;
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private Field viewEventBusField;
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private Method viewInjectPresenterMethod;
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private Method viewInitMethod;
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private Method conversationHolderMethod;
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public PopupEditorFactory(){
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initFieldsAccess();
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}
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/**
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*
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*/
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private void initFieldsAccess() {
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try {
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presenterRepoField = AbstractPresenter.class.getDeclaredField("repo");
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presenterRepoField.setAccessible(true);
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presenterNavigationManagerField = AbstractPresenter.class.getDeclaredField("navigationManager");
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presenterNavigationManagerField.setAccessible(true);
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presenterEventBusField = AbstractEditorPresenter.class.getDeclaredField("eventBus");
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presenterEventBusField.setAccessible(true);
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conversationHolderMethod = AbstractPresenter.class.getDeclaredMethod("setConversationHolder", ViewScopeConversationHolder.class);
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conversationHolderMethod.setAccessible(true);
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viewEventBusField = AbstractView.class.getDeclaredField("eventBus");
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viewEventBusField.setAccessible(true);
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viewInjectPresenterMethod = AbstractView.class.getDeclaredMethod("injectPresenter", AbstractPresenter.class);
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viewInjectPresenterMethod.setAccessible(true);
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viewInitMethod = AbstractView.class.getDeclaredMethod("init");
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viewInitMethod.setAccessible(true);
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} catch (NoSuchFieldException | SecurityException | NoSuchMethodException e) {
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throw new RuntimeException("Severe error during initialization. Please check the classes AbstractPresenter, AbstractEditorPresenter, AbstractView for modificactions.", e);
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}
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}
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/**
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* @param popupViewClass
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* @return
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*/
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public <V extends PopupView, P extends AbstractPresenter> PopupView newPopupView(Class<V> popupViewClass) {
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Class<? extends AbstractPresenter<?>> presenterClass = findGenericPresenterType(popupViewClass);
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try {
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P presenter = (P) presenterClass.newInstance();
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injectPresenterBeans(presenterClass, presenter);
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PopupView view = popupViewClass.newInstance();
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if(AbstractView.class.isAssignableFrom(popupViewClass)){
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AbstractView<P> abstractView = (AbstractView<P>)view;
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viewEventBusField.set(abstractView, eventBus);
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viewInjectPresenterMethod.invoke(abstractView, presenter);
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// invoke the @PostConstruct method
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viewInitMethod.invoke(abstractView);
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}
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return view;
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} catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
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throw new RuntimeException(String.format("Error creating the view class '%s' with presenter class '%s'", popupViewClass, presenterClass), e);
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}
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}
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/**
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* @param presenterClass
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* @param presenter
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* @throws IllegalAccessException
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* @throws InvocationTargetException
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* @throws IllegalArgumentException
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*/
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public <P extends AbstractPresenter> void injectPresenterBeans(
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Class<? extends AbstractPresenter<?>> presenterClass, P presenter) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
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presenterRepoField.set(presenter, repo);
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presenterNavigationManagerField.set(presenter, navigationManager);
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conversationHolderMethod.invoke(presenter, new ViewScopeConversationHolder(dataSource, sessionFactory, transactionManager));
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if(AbstractEditorPresenter.class.isAssignableFrom(presenterClass)){
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presenterEventBusField.set(presenter, eventBus);
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}
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}
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/**
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* @param popupViewClass
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* @return
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*/
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@SuppressWarnings("unchecked")
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private Class<? extends AbstractPresenter<?>> findGenericPresenterType(Class<? extends PopupView> popupViewClass) {
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ParameterizedType genericSuperClass = (ParameterizedType)popupViewClass.getGenericSuperclass();
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Type[] typeArgs = genericSuperClass.getActualTypeArguments();
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if(AbstractPopupEditor.class.isAssignableFrom(popupViewClass)){
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return (Class<? extends AbstractPresenter<?>>) typeArgs[1];
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} else {
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return (Class<? extends AbstractPresenter<?>>) typeArgs[0];
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}
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}
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}
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