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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.mvp;
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import org.hibernate.FlushMode;
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import org.vaadin.spring.events.annotation.EventBusListenerMethod;
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import com.vaadin.data.Property;
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import com.vaadin.ui.Component;
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import com.vaadin.ui.Field;
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import eu.etaxonomy.cdm.vaadin.event.AbstractEditorAction;
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import eu.etaxonomy.vaadin.mvp.event.EditorDeleteEvent;
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import eu.etaxonomy.vaadin.mvp.event.EditorPreSaveEvent;
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import eu.etaxonomy.vaadin.mvp.event.EditorSaveEvent;
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import eu.etaxonomy.vaadin.mvp.event.EditorViewEvent;
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import eu.etaxonomy.vaadin.ui.view.PopupView;
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import eu.etaxonomy.vaadin.util.PropertyIdPath;
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/**
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* Presenters of this type are usually be used in conjunction with a {@link AbstractPopupEditor}.
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* The presenter automatically handles save and delete operations. The methods {@link #saveBean(Object)} and
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* {@link AbstractEditorPresenter#deleteBean(Object)} are executed internally in turn of an
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* {@link EditorSaveEvent} or {@link EditorDeleteEvent} which are send by the {@link AbstractPopupEditor#save()}
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* or {@link AbstractPopupEditor#delete()} method.
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*
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* @author a.kohlbecker
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* @since Apr 5, 2017
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*
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*/
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public abstract class AbstractEditorPresenter<DTO extends Object, V extends ApplicationView<?>> extends AbstractPresenter<V> {
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private static final long serialVersionUID = -6677074110764145236L;
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FlushMode previousPreSaveEvenFlushMode = null;
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protected BeanInstantiator<DTO> beanInstantiator = null;
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/**
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* Load the bean to be edited in the editor freshly from the persistent storage.
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* Ore create an new empty instance in case the supplied <code>identifier</code> is <code>null</code>.
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*
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* @param identifier
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* @return
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*/
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protected abstract DTO loadBeanById(Object identifier);
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/**
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* Set ui elements to readonly or disabled to adapt the editor to
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* the permissions that are given to the current user etc.
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*
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* @param beanToEdit
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*/
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protected void adaptToUserPermission(DTO beanToEdit) {
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}
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/**
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* @param beanInstantiator the beanInstantiator to set
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*/
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public void setBeanInstantiator(BeanInstantiator<DTO> beanInstantiator) {
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this.beanInstantiator = beanInstantiator;
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}
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@EventBusListenerMethod
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public void onEditorPreSaveEvent(EditorPreSaveEvent<DTO> preSaveEvent){
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if(!isFromOwnView(preSaveEvent)){
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return;
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}
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}
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@EventBusListenerMethod
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public void onEditorSaveEvent(EditorSaveEvent<DTO> saveEvent){
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if(!isFromOwnView(saveEvent)){
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return;
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}
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DTO bean = saveEvent.getBean();
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saveBean(bean);
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}
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/**
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* @param saveEvent
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*/
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@EventBusListenerMethod
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public void onEditorDeleteEvent(EditorDeleteEvent<DTO> deleteEvent){
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if(!isFromOwnView(deleteEvent)){
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return;
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}
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deleteBean(deleteEvent.getBean());
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}
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/**
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* @param saveEvent
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* @return
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*/
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protected boolean isFromOwnView(EditorViewEvent saveEvent) {
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return saveEvent.getView().equals(getView());
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}
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protected Class<V> getViewType() {
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return (Class<V>) super.getView().getClass();
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}
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protected boolean isFromOwnView(AbstractEditorAction action){
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return action.getSourceView() != null && getView().equals(action.getSourceView());
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}
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protected abstract void saveBean(DTO bean);
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/**
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* @param bean
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*/
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protected abstract void deleteBean(DTO bean);
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/**
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*
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* @param popupView
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* @return <code>null</code> in case no target field has been found for the supplied <code>popupView</code>.
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*/
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protected BoundField boundTargetField(PopupView popupView) {
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Field<?> field = getNavigationManager().targetFieldOf(popupView);
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PropertyIdPath propertyIdPath = boundPropertyIdPath(field);
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if(field != null){
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return new BoundField(field, propertyIdPath);
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} else {
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return null;
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}
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}
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protected PropertyIdPath boundPropertyIdPath(Field<?> targetField){
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if(targetField == null || getView() == null){
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return null;
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}
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Field<?> boundField = findBoundField(targetField);
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if(boundField != null) {
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return ((AbstractPopupEditor)getView()).boundPropertyIdPath(boundField);
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}
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return null;
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}
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/**
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* @param targetField
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* @return
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*/
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protected Field<?> findBoundField(Field<?> targetField) {
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Component parentComponent = targetField;
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Property<?> p = null;
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while(parentComponent != null){
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if(Field.class.isAssignableFrom(parentComponent.getClass())){
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Field<?> parentField = (Field<?>)parentComponent;
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if(parentField.getPropertyDataSource() != null){
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return parentField;
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}
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}
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parentComponent = parentComponent.getParent();
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}
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return null;
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}
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}
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