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.vaadin.addons.sitekit.viewlet.administrator.user; import org.vaadin.addons.sitekit.flow.AbstractFlowlet; import org.vaadin.addons.sitekit.grid.FieldDescriptor; import org.vaadin.addons.sitekit.grid.FilterDescriptor; import org.vaadin.addons.sitekit.grid.FormattingTable; import org.vaadin.addons.sitekit.grid.Grid; import org.vaadin.addons.sitekit.grid.ValidatingEditor; import org.vaadin.addons.sitekit.grid.ValidatingEditorStateListener; import org.vaadin.addons.sitekit.model.User; import org.vaadin.addons.sitekit.model.GroupMember; import org.vaadin.addons.sitekit.site.SiteFields; import org.vaadin.addons.sitekit.util.ContainerUtil; import org.vaadin.addons.sitekit.util.StringUtil; import com.vaadin.data.util.BeanItem; import com.vaadin.data.util.filter.Compare; 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 com.vaadin.ui.Table; import org.vaadin.addons.lazyquerycontainer.EntityContainer; import javax.persistence.EntityManager; import java.nio.charset.Charset; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.ArrayList; import java.util.Date; import java.util.List; /** * User edit Flowlet. * * @author Tommi S.E. Laukkanen */ public final class UserFlowlet extends AbstractFlowlet implements ValidatingEditorStateListener { /** Serial version UID. */ private static final long serialVersionUID = 1L; /** The entity manager. */ private EntityManager entityManager; /** The user flow. */ private User user; /** The entity form. */ private ValidatingEditor editor; /** The save button. */ private Button saveButton; /** The discard button. */ private Button discardButton; /** The entity container. */ private EntityContainer<GroupMember> childContainer; /** The list button layout. */ private HorizontalLayout childListButtonLayout; /** The user element grid. */ private Grid childGrid; @Override public String getFlowletKey() { return "user"; } @Override public boolean isDirty() { return editor.isModified(); } @Override public boolean isValid() { return editor.isValid(); } @Override public void initialize() { entityManager = getSite().getSiteContext().getObject(EntityManager.class); final GridLayout layout = new GridLayout(2, 3); layout.setSizeFull(); layout.setMargin(false); layout.setSpacing(true); layout.setRowExpandRatio(1, 1f); layout.setColumnExpandRatio(1, 1f); setViewContent(layout); editor = new ValidatingEditor(SiteFields.getFieldDescriptors(User.class)); editor.setCaption("User"); editor.addListener((ValidatingEditorStateListener) this); editor.setWidth("380px"); layout.addComponent(editor, 0, 1); final List<FieldDescriptor> childFieldDescriptors = SiteFields.getFieldDescriptors(GroupMember.class); final List<FilterDescriptor> childFilterDescriptors = new ArrayList<FilterDescriptor>(); childContainer = new EntityContainer<GroupMember>(entityManager, GroupMember.class, "groupMemberId", 1000, true, false, false); childContainer.getQueryView().getQueryDefinition().setDefaultSortState( new String[] { "user.firstName", "user.lastName" }, new boolean[] { true, true }); ContainerUtil.addContainerProperties(childContainer, childFieldDescriptors); final Table childTable = new FormattingTable(); childGrid = new Grid(childTable, childContainer); childGrid.setFields(childFieldDescriptors); childGrid.setFilters(childFilterDescriptors); childTable.setColumnCollapsed("created", true); layout.addComponent(childGrid, 1, 1); final HorizontalLayout editorButtonLayout = new HorizontalLayout(); editorButtonLayout.setSpacing(true); layout.addComponent(editorButtonLayout, 0, 2); saveButton = new Button("Save"); saveButton.setImmediate(true); editorButtonLayout.addComponent(saveButton); saveButton.addListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { editor.commit(); entityManager.getTransaction().begin(); try { if (user.getPasswordHash() != null) { final int hashSize = 64; if (user.getPasswordHash().length() != hashSize) { final byte[] passwordAndSaltBytes = (user.getEmailAddress() + ":" + user.getPasswordHash()).getBytes(Charset.forName("UTF-8")); try { final MessageDigest md = MessageDigest.getInstance("SHA-256"); final byte[] passwordAndSaltDigest = md.digest(passwordAndSaltBytes); user.setPasswordHash(StringUtil.toHexString(passwordAndSaltDigest)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } } } // UserLogic.updateUser(user, // UserDao.getGroupMembers(entityManager, user)); user = entityManager.merge(user); entityManager.persist(user); entityManager.getTransaction().commit(); editor.setItem(new BeanItem<User>(user), false); //entityManager.detach(user); } catch (final Throwable t) { if (entityManager.getTransaction().isActive()) { entityManager.getTransaction().rollback(); } throw new RuntimeException("Failed to save entity: " + user, t); } } }); discardButton = new Button("Discard"); discardButton.setImmediate(true); editorButtonLayout.addComponent(discardButton); discardButton.addListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { editor.discard(); } }); childListButtonLayout = new HorizontalLayout(); childListButtonLayout.setSpacing(true); childListButtonLayout.setSizeUndefined(); layout.addComponent(childListButtonLayout, 1, 0); final Button addButton = getSite().getButton("add"); childListButtonLayout.addComponent(addButton); addButton.addClickListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { final GroupMember userElement = new GroupMember(); userElement.setUser(user); userElement.setCreated(new Date()); final UserGroupMemberFlowlet userGroupMemberFlowlet = getFlow() .forward(UserGroupMemberFlowlet.class); userGroupMemberFlowlet.edit(userElement, true); } }); final Button removeButton = getSite().getButton("remove"); childListButtonLayout.addComponent(removeButton); removeButton.addClickListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { childContainer.removeItem(childGrid.getSelectedItemId()); childContainer.commit(); } }); } /** * Edit an existing user. * @param entity entity to be edited. * @param newEntity true if entity to be edited is new. */ public void edit(final User entity, final boolean newEntity) { this.user = entity; editor.setItem(new BeanItem<User>(entity), newEntity); childContainer.getQueryView().getQueryDefinition().removeDefaultFilters(); childContainer.getQueryView().getQueryDefinition().addDefaultFilter(new Compare.Equal("user", user)); childGrid.refresh(); } @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); } childListButtonLayout.setEnabled(!editor.isNewItem()); } @Override public void enter() { if (user.getUserId() != null) { entityManager.refresh(user); } childContainer.getQueryView().getQueryDefinition().removeDefaultFilters(); childContainer.getQueryView().getQueryDefinition().addDefaultFilter(new Compare.Equal("user", user)); childGrid.refresh(); } }