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.group; 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.bubblecloud.ilves.component.flow.AbstractFlowlet; import org.bubblecloud.ilves.component.grid.*; import org.bubblecloud.ilves.model.Group; import org.bubblecloud.ilves.model.GroupMember; import org.bubblecloud.ilves.security.SecurityService; import org.bubblecloud.ilves.site.SiteFields; import org.bubblecloud.ilves.util.ContainerUtil; import org.vaadin.addons.lazyquerycontainer.EntityContainer; import javax.persistence.EntityManager; import java.util.ArrayList; import java.util.Date; import java.util.List; /** * Group edit flow. * * @author Tommi S.E. Laukkanen */ public final class GroupFlowlet extends AbstractFlowlet implements ValidatingEditorStateListener { /** Serial version UID. */ private static final long serialVersionUID = 1L; /** The entity manager. */ private EntityManager entityManager; /** The group flow. */ private Group entity; /** The entity form. */ private ValidatingEditor groupEditor; /** 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; /** If group details are in read only mode. */ private final boolean detailsReadonly; /** * Constructor which sets read only statuses. * * @param detailsReadonly if group details should be read only. */ public GroupFlowlet(boolean detailsReadonly) { this.detailsReadonly = detailsReadonly; } @Override public String getFlowletKey() { return "group"; } @Override public boolean isDirty() { return groupEditor.isModified(); } @Override public boolean isValid() { return groupEditor.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); setViewContent(layout); groupEditor = new ValidatingEditor(SiteFields.getFieldDescriptors(Group.class)); groupEditor.setCaption("Group"); groupEditor.addListener((ValidatingEditorStateListener) this); groupEditor.setReadOnly(detailsReadonly); layout.addComponent(groupEditor, 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.addClickListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { groupEditor.commit(); if (entity.getGroupId() == null) { SecurityService.addGroup(getSite().getSiteContext(), entity); } else { SecurityService.updateGroup(getSite().getSiteContext(), entity); } } }); discardButton = new Button("Discard"); discardButton.setImmediate(true); editorButtonLayout.addComponent(discardButton); discardButton.addClickListener(new ClickListener() { /** Serial version UID. */ private static final long serialVersionUID = 1L; @Override public void buttonClick(final ClickEvent event) { groupEditor.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 groupMember = new GroupMember(); groupMember.setGroup(entity); groupMember.setCreated(new Date()); final GroupUserMemberFlowlet userGroupMemberFlowlet = getFlow() .forward(GroupUserMemberFlowlet.class); userGroupMemberFlowlet.edit(groupMember, 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) { if (childGrid.getSelectedItemId() == null) { return; } final GroupMember groupMember = childContainer.getEntity(childGrid.getSelectedItemId()); if (groupMember != null) { SecurityService.removeGroupMember(getSite().getSiteContext(), groupMember.getGroup(), groupMember.getUser()); childContainer.refresh(); } } }); } /** * Edit an existing group. * @param entity entity to be edited. * @param newEntity true if entity to be edited is new. */ public void edit(final Group entity, final boolean newEntity) { this.entity = entity; groupEditor.setItem(new BeanItem<Group>(entity), newEntity); childContainer.getQueryView().getQueryDefinition().removeDefaultFilters(); childContainer.getQueryView().getQueryDefinition().addDefaultFilter(new Compare.Equal("group", entity)); 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); } } @Override public void enter() { if (entity != null && entity.getGroupId() != null) { entityManager.refresh(entity); } childContainer.getQueryView().getQueryDefinition().removeDefaultFilters(); childContainer.getQueryView().getQueryDefinition().addDefaultFilter(new Compare.Equal("group", entity)); childGrid.refresh(); } }