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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 java.util.Collection;
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import java.util.EnumSet;
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import java.util.HashSet;
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import java.util.UUID;
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import org.apache.log4j.Logger;
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import org.hibernate.HibernateException;
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import org.springframework.beans.factory.annotation.Autowired;
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import eu.etaxonomy.cdm.api.service.IService;
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import eu.etaxonomy.cdm.cache.CdmTransientEntityCacher;
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import eu.etaxonomy.cdm.debug.PersistentContextAnalyzer;
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import eu.etaxonomy.cdm.model.ICdmCacher;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.User;
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import eu.etaxonomy.cdm.persistence.hibernate.permission.CRUD;
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import eu.etaxonomy.cdm.persistence.hibernate.permission.CdmAuthority;
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import eu.etaxonomy.cdm.service.CdmFilterablePagingProviderFactory;
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import eu.etaxonomy.cdm.service.CdmStore;
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import eu.etaxonomy.cdm.vaadin.event.EntityChangeEvent;
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import eu.etaxonomy.cdm.vaadin.permission.VaadinUserHelper;
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import eu.etaxonomy.cdm.vaadin.view.name.CachingPresenter;
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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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/**
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* Provides generic save operations of modified cdm entities.
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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 CdmEditorPresenterBase<DTO, CDM extends CdmBase, V extends ApplicationView<?>> extends AbstractEditorPresenter<DTO, V>
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implements CachingPresenter {
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private static final long serialVersionUID = 2218185546277084261L;
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private static final Logger logger = Logger.getLogger(CdmEditorPresenterBase.class);
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/**
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* if not null, this CRUD set is to be used to create a CdmAuthoritiy for the base entity which will be
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* granted to the current use as long this grant is not assigned yet.
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*/
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protected EnumSet<CRUD> crud = null;
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private ICdmCacher cache;
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private java.util.Collection<CdmBase> rootEntities = new HashSet<>();
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public CdmEditorPresenterBase() {
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super();
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logger.trace(this._toString() + " constructor");
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}
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CdmStore<CDM, IService<CDM>> store ;
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protected CdmAuthority newAuthorityCreated;
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@Autowired
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protected CdmFilterablePagingProviderFactory pagingProviderFactory;
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protected CdmStore<CDM, IService<CDM>> getStore() {
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if(store == null){
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store = new CdmStore<>(getRepo(), getService());
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}
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return store;
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}
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@Override
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protected DTO loadBeanById(Object identifier) {
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CDM cdmEntitiy;
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if(identifier != null) {
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UUID uuidIdentifier = (UUID)identifier;
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// CdmAuthority is needed before the bean is loaded into the session.
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// otherwise adding the authority to the user would cause a flush
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cdmEntitiy = loadCdmEntity(uuidIdentifier);
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guaranteePerEntityCRUDPermissions(cdmEntitiy);
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} else {
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cdmEntitiy = loadCdmEntity(null);
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if(cdmEntitiy != null){
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guaranteePerEntityCRUDPermissions(cdmEntitiy);
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}
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}
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cache = new CdmTransientEntityCacher(this);
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// need to use load but put see #7214
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cdmEntitiy = cache.load(cdmEntitiy);
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addRootEntity(cdmEntitiy);
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DTO dto = createDTODecorator(cdmEntitiy);
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return dto;
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}
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/**
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* @param cdmEntitiy
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* @return
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*/
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protected abstract DTO createDTODecorator(CDM cdmEntitiy);
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/**
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* @param cdmEntitiy
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*/
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@Override
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protected void adaptToUserPermission(DTO dto) {
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CDM cdmEntitiy = cdmEntity(dto);
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VaadinUserHelper userHelper = VaadinUserHelper.fromSession();
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boolean canDelte = userHelper.userHasPermission(cdmEntitiy, CRUD.DELETE);
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boolean canEdit = userHelper.userHasPermission(cdmEntitiy, CRUD.UPDATE);
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User user = userHelper.user();
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if(AbstractCdmPopupEditor.class.isAssignableFrom(getView().getClass())){
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AbstractCdmPopupEditor popupView = ((AbstractCdmPopupEditor)getView());
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if(!canEdit){
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popupView.setReadOnly(true); // never reset true to false here!
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logger.debug("setting editor to readonly");
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}
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if(!canDelte){
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popupView.withDeleteButton(false);
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logger.debug("removing delete button");
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}
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}
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}
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/**
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* @param dto
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* @return
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*/
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protected abstract CDM cdmEntity(DTO dto);
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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 CDM loadCdmEntity(UUID uuid);
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/**
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* Grant per entity CdmAuthority to the current user <b>for the bean which is not yet loaded</b>
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* into the editor. The <code>CRUD</code> to be granted are stored in the <code>crud</code> field.
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*/
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protected abstract void guaranteePerEntityCRUDPermissions(UUID identifier);
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/**
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* Grant per entity CdmAuthority to the current user for the bean which is loaded
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* into the editor. The <code>CRUD</code> to be granted are stored in the <code>crud</code> field.
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*/
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protected abstract void guaranteePerEntityCRUDPermissions(CDM bean);
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/**
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* @return
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*/
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protected abstract IService<CDM> getService();
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@SuppressWarnings("unchecked")
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@Override
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// @EventBusListenerMethod // already annotated at super class
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public void onEditorPreSaveEvent(EditorPreSaveEvent preSaveEvent){
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if(!isFromOwnView(preSaveEvent)){
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return;
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}
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super.onEditorPreSaveEvent(preSaveEvent);
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}
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@Override
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// @EventBusListenerMethod // already annotated at super class
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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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// the bean is now updated with the changes made by the user
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DTO dto = saveEvent.getBean();
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CDM cdmEntity = cdmEntity(dto);
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if(logger.isTraceEnabled()){
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PersistentContextAnalyzer pca = new PersistentContextAnalyzer(cdmEntity);
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pca.printEntityGraph(System.err);
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pca.printCopyEntities(System.err);
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}
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if(logger.isTraceEnabled()){
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PersistentContextAnalyzer pca = new PersistentContextAnalyzer(cdmEntity);
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pca.printEntityGraph(System.err);
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pca.printCopyEntities(System.err);
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}
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EntityChangeEvent<?> changeEvent = null;
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try {
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dto = preSaveBean(dto);
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changeEvent = getStore().saveBean(cdmEntity, (AbstractView<?>) getView());
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if(changeEvent != null){
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viewEventBus.publish(this, changeEvent);
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}
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} catch (HibernateException e){
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if(newAuthorityCreated != null){
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VaadinUserHelper.fromSession().removeAuthorityForCurrentUser(newAuthorityCreated);
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}
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throw e;
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} finally {
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postSaveBean(changeEvent);
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}
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}
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/**
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* This method is intended to be used for the following purposes:
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* <ol>
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* <li>
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* EditorPresenters for beans with transient properties can overwrite this method to
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* update the beanItem with the changes made to the transient properties.
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* This can be necessary because Vaadin MethodProperties are readonly when no setter is
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* available. This can be the case with transient properties. Automatic updating
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* of the property during the fieldGroup commit does not work in this case.
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* Presenters, however, should <b>operate on DTOs instead, which can implement the missing setter</b>.</li>
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*
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* <li>When modifying a bi-directional relation between two instances the user would
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* need to have GrantedAuthorities for both sides of the relationship. This, however is not
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* always possible. As a temporary solution the user can be granted the missing authority just
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* for the time of saving the new relationship. You may also want to implement
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* {@link #postSaveBean(EntityChangeEvent)} in this case.
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* See {@link https://dev.e-taxonomy.eu/redmine/issues/7390 #7390}
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* </li>
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* </ol>
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*
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*/
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protected DTO preSaveBean(DTO bean) {
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// blank implementation, to be implemented by sub classes if needed
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return bean;
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}
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@Override
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protected
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final void saveBean(DTO bean){
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// blank implementation, since this is not needed in this or any sub class
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// see onEditorSaveEvent() instead
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}
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/**
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* Called after saving the DTO to the persistent storage.
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* This method is called in any case even if the save operation failed.
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* See {@link #postSaveBean(EntityChangeEvent)}.
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*
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* @param changeEvent may be null in case of errors during the save operation
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*/
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protected void postSaveBean(EntityChangeEvent changeEvent) {
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// blank implementation, to be implemented by sub classes if needed
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}
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@Override
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protected void deleteBean(DTO bean){
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CDM cdmEntity = cdmEntity(bean);
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EntityChangeEvent changeEvent = getStore().deleteBean(cdmEntity, (AbstractView) getView());
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if(changeEvent != null){
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viewEventBus.publish(this, changeEvent);
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}
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}
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/**
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* @param crud
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*/
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public void setGrantsForCurrentUser(EnumSet<CRUD> crud) {
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this.crud = crud;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public ICdmCacher getCache() {
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return cache;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void addRootEntity(CdmBase entity) {
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rootEntities.add(entity);
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public Collection<CdmBase> getRootEntities() {
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return rootEntities;
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}
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}
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