Java tutorial
/* * Copyright (c) 2011 Brown Bag Consulting. * This file is part of the PureCRUD project. * Author: Juan Osuna * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License Version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * Brown Bag Consulting, Brown Bag Consulting DISCLAIMS THE WARRANTY OF * NON INFRINGEMENT OF THIRD PARTY RIGHTS. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the PureCRUD software without * disclosing the source code of your own applications. These activities * include: offering paid services to customers as an ASP, providing * services from a web application, shipping PureCRUD with a closed * source product. * * For more information, please contact Brown Bag Consulting at this * address: juan@brownbagconsulting.com. */ package com.purebred.core.view.tomanyrelationship; import com.purebred.core.MainApplication; import com.purebred.core.dao.ToManyRelationshipQuery; import com.purebred.core.security.SecurityService; import com.purebred.core.util.BeanPropertyType; import com.purebred.core.util.assertion.Assert; import com.purebred.core.view.util.MessageSource; import com.purebred.core.view.Results; import com.purebred.core.view.menu.ActionContextMenu; import com.vaadin.terminal.ThemeResource; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.HorizontalLayout; import org.apache.commons.beanutils.PropertyUtils; import org.vaadin.dialogs.ConfirmDialog; import javax.annotation.PostConstruct; import javax.annotation.Resource; import java.lang.reflect.InvocationTargetException; import java.util.Collection; public abstract class ToManyRelationshipResults<T> extends Results<T> { @Resource(name = "uiMessageSource") protected MessageSource uiMessageSource; @Resource protected ActionContextMenu actionContextMenu; @Resource private SecurityService securityService; protected HorizontalLayout crudButtons; private Button addButton; protected Button removeButton; protected ToManyRelationshipResults() { super(); } public abstract String getEntityCaption(); public abstract String getChildPropertyId(); public abstract String getParentPropertyId(); @Override public abstract ToManyRelationshipQuery getEntityQuery(); @PostConstruct @Override public void postConstruct() { super.postConstruct(); crudButtons = new HorizontalLayout(); crudButtons.setMargin(false); crudButtons.setSpacing(true); addButton = new Button(uiMessageSource.getMessage("entityResults.add"), this, "add"); addButton.setDescription(uiMessageSource.getMessage("entityResults.add.description")); addButton.setIcon(new ThemeResource("icons/16/add.png")); addButton.addStyleName("small default"); crudButtons.addComponent(addButton); removeButton = new Button(uiMessageSource.getMessage("entityResults.remove"), this, "remove"); removeButton.setDescription(uiMessageSource.getMessage("entityResults.remove.description")); removeButton.setIcon(new ThemeResource("icons/16/delete.png")); removeButton.setEnabled(false); removeButton.addStyleName("small default"); crudButtons.addComponent(removeButton); getCrudButtons().addComponent(crudButtons, 0); getCrudButtons().setComponentAlignment(crudButtons, Alignment.MIDDLE_LEFT); getResultsTable().setMultiSelect(true); actionContextMenu.addAction("entityResults.remove", this, "remove"); actionContextMenu.setActionEnabled("entityResults.remove", true); addSelectionChangedListener(this, "selectionChanged"); } public abstract void add(); public void setReferencesToParentAndPersist(T... values) { for (T value : values) { T referenceValue = getEntityDao().getReference(value); setReferenceToParent(referenceValue); getEntityDao().persist(referenceValue); } searchImpl(false); } public void setReferenceToParent(T value) { try { BeanPropertyType beanPropertyType = BeanPropertyType.getBeanPropertyType(getEntityType(), getParentPropertyId()); Assert.PROGRAMMING.assertTrue(!beanPropertyType.isCollectionType(), "Parent property id (" + getEntityType() + "." + getParentPropertyId() + ") must not be a collection type"); PropertyUtils.setProperty(value, getParentPropertyId(), getEntityQuery().getParent()); } catch (IllegalAccessException e) { throw new RuntimeException(e); } catch (InvocationTargetException e) { throw new RuntimeException(e); } catch (NoSuchMethodException e) { throw new RuntimeException(e); } } public void setReadOnly(boolean isReadOnly) { addButton.setVisible(!isReadOnly); removeButton.setVisible(!isReadOnly); } public void applySecurityIsEditable() { boolean isEditable = securityService.getCurrentUser().isEditAllowed(getEntityType().getName(), getChildPropertyId()); addButton.setVisible(isEditable); removeButton.setVisible(isEditable); if (isEditable) { getResultsTable().addActionHandler(actionContextMenu); } else { getResultsTable().removeActionHandler(actionContextMenu); } } public void valuesRemoved(T... values) { for (T value : values) { value = getEntityDao().getReference(value); try { PropertyUtils.setProperty(value, getParentPropertyId(), null); } catch (IllegalAccessException e) { throw new RuntimeException(e); } catch (InvocationTargetException e) { throw new RuntimeException(e); } catch (NoSuchMethodException e) { throw new RuntimeException(e); } getEntityDao().persist(value); } searchImpl(false); removeButton.setEnabled(false); } public void removeImpl() { Collection<T> selectedValues = getSelectedValues(); valuesRemoved((T[]) selectedValues.toArray()); } public void remove() { ConfirmDialog.show(MainApplication.getInstance().getMainWindow(), uiMessageSource.getMessage("entityResults.confirmationCaption"), uiMessageSource.getMessage("entityResults.confirmationPrompt"), uiMessageSource.getMessage("entityResults.confirmationYes"), uiMessageSource.getMessage("entityResults.confirmationNo"), new ConfirmDialog.Listener() { public void onClose(ConfirmDialog dialog) { if (dialog.isConfirmed()) { removeImpl(); } } }); } public void selectionChanged() { Collection itemIds = (Collection) getResultsTable().getValue(); if (itemIds.size() > 0) { getResultsTable().addActionHandler(actionContextMenu); removeButton.setEnabled(true); } else { getResultsTable().removeActionHandler(actionContextMenu); removeButton.setEnabled(false); } } }