Java tutorial
/** * Copyright 2013 Tommi S.E. Laukkanen * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.bubblecloud.ilves.ui.administrator.company; import com.vaadin.data.util.BeanItem; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.Button.ClickListener; import com.vaadin.ui.GridLayout; import com.vaadin.ui.HorizontalLayout; import org.bubblecloud.ilves.component.flow.AbstractFlowlet; import org.bubblecloud.ilves.component.grid.ValidatingEditor; import org.bubblecloud.ilves.component.grid.ValidatingEditorStateListener; import org.bubblecloud.ilves.model.Company; import org.bubblecloud.ilves.model.PostalAddress; import org.bubblecloud.ilves.security.SecurityService; import org.bubblecloud.ilves.site.SiteFields; import javax.persistence.EntityManager; /** * Company edit flow. * @author Tommi S.E. Laukkanen */ public final class CompanyFlowlet extends AbstractFlowlet implements ValidatingEditorStateListener { /** Serial version UID. */ private static final long serialVersionUID = 1L; /** The entity manager. */ private EntityManager entityManager; /** The company flow. */ private Company entity; /** The entity form. */ private ValidatingEditor companyEditor; /** The entity form. */ private ValidatingEditor invoicingAddressEditor; /** The entity form. */ private ValidatingEditor deliveryAddressEditor; /** The save button. */ private Button saveButton; /** The discard button. */ private Button discardButton; @Override public String getFlowletKey() { return "company"; } @Override public boolean isDirty() { return companyEditor.isModified() || invoicingAddressEditor.isModified() || deliveryAddressEditor.isModified(); } @Override public boolean isValid() { return companyEditor.isValid() && invoicingAddressEditor.isValid() && deliveryAddressEditor.isValid(); } @Override public void initialize() { entityManager = getSite().getSiteContext().getObject(EntityManager.class); final GridLayout gridLayout = new GridLayout(2, 3); gridLayout.setSizeFull(); gridLayout.setMargin(false); gridLayout.setSpacing(true); gridLayout.setRowExpandRatio(1, 1f); setViewContent(gridLayout); companyEditor = new ValidatingEditor(SiteFields.getFieldDescriptors(Company.class)); companyEditor.setCaption("Site"); companyEditor.addListener((ValidatingEditorStateListener) this); gridLayout.addComponent(companyEditor, 0, 0, 0, 1); invoicingAddressEditor = new ValidatingEditor(SiteFields.getFieldDescriptors(PostalAddress.class)); invoicingAddressEditor.setCaption("Invoicing Address"); invoicingAddressEditor.addListener((ValidatingEditorStateListener) this); gridLayout.addComponent(invoicingAddressEditor, 1, 0); deliveryAddressEditor = new ValidatingEditor(SiteFields.getFieldDescriptors(PostalAddress.class)); deliveryAddressEditor.setCaption("Delivery Address"); deliveryAddressEditor.addListener((ValidatingEditorStateListener) this); gridLayout.addComponent(deliveryAddressEditor, 1, 1); final HorizontalLayout buttonLayout = new HorizontalLayout(); buttonLayout.setSpacing(true); gridLayout.addComponent(buttonLayout, 0, 2); saveButton = new Button("Save"); saveButton.setImmediate(true); buttonLayout.addComponent(saveButton); saveButton.addClickListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { companyEditor.commit(); invoicingAddressEditor.commit(); deliveryAddressEditor.commit(); if (entity.getCompanyId() == null) { SecurityService.addCompany(getSite().getSiteContext(), entity); } else { SecurityService.updateCompany(getSite().getSiteContext(), entity); } } }); discardButton = new Button("Discard"); discardButton.setImmediate(true); buttonLayout.addComponent(discardButton); discardButton.addClickListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { companyEditor.discard(); invoicingAddressEditor.discard(); deliveryAddressEditor.discard(); } }); } /** * Edit an existing company. * @param entity entity to be edited. * @param newEntity true if entity to be edited is new. */ public void edit(final Company entity, final boolean newEntity) { this.entity = entity; companyEditor.setItem(new BeanItem<Company>(entity), newEntity); invoicingAddressEditor.setItem(new BeanItem<PostalAddress>(entity.getInvoicingAddress()), newEntity); deliveryAddressEditor.setItem(new BeanItem<PostalAddress>(entity.getDeliveryAddress()), newEntity); } @Override public void editorStateChanged(final ValidatingEditor source) { if (isDirty()) { if (isValid()) { saveButton.setEnabled(true); } else { saveButton.setEnabled(false); } discardButton.setEnabled(true); } else { saveButton.setEnabled(false); discardButton.setEnabled(false); } } @Override public void enter() { } }