Java tutorial
/* 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.activiti.explorer.ui.management.db; import java.util.TreeMap; import org.activiti.engine.ManagementService; import org.activiti.engine.ProcessEngines; import org.activiti.explorer.ExplorerApp; import org.activiti.explorer.navigation.DatabaseNavigator; import org.activiti.explorer.navigation.UriFragment; import org.activiti.explorer.ui.Images; import org.activiti.explorer.ui.management.ManagementPage; import com.vaadin.data.Item; import com.vaadin.data.Property; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.terminal.Resource; import com.vaadin.ui.Embedded; import com.vaadin.ui.Table; /** * @author Joram Barrez */ public class DatabasePage extends ManagementPage { private static final long serialVersionUID = 1L; protected transient ManagementService managementService = ProcessEngines.getDefaultProcessEngine() .getManagementService(); protected String tableName; public DatabasePage() { ExplorerApp.get().setCurrentUriFragment(new UriFragment(DatabaseNavigator.TABLE_URI_PART)); } public DatabasePage(String tableName) { this(); this.tableName = tableName; } @Override protected void initUi() { super.initUi(); populateTableList(); // tablelist is NOT lazy loaded, since there are only a few tables if (tableName == null) { selectElement(0); } else { table.select(tableName); } } @Override protected Table createList() { final Table tableList = new Table(); // Listener to change right panel when clicked on a task tableList.addListener(new Property.ValueChangeListener() { private static final long serialVersionUID = 8811553575319455854L; public void valueChange(ValueChangeEvent event) { // The itemId of the table list is the tableName String tableName = (String) event.getProperty().getValue(); setDetailComponent(new DatabaseDetailPanel(tableName)); // Update URL ExplorerApp.get() .setCurrentUriFragment(new UriFragment(DatabaseNavigator.TABLE_URI_PART, tableName)); } }); // Create column headers tableList.addContainerProperty("icon", Embedded.class, null); tableList.setColumnWidth("icon", 22); tableList.addContainerProperty("tableName", String.class, null); tableList.setColumnHeaderMode(Table.COLUMN_HEADER_MODE_HIDDEN); return tableList; } protected void populateTableList() { TreeMap<String, Long> tables = new TreeMap<String, Long>(managementService.getTableCount()); // treemap because we want to sort it on name for (String tableName : tables.keySet()) { Item item = table.addItem(tableName); item.getItemProperty("icon").setValue(determineTableIcon(tableName)); item.getItemProperty("tableName").setValue(tableName + " (" + tables.get(tableName) + ")"); } } protected Embedded determineTableIcon(String tableName) { Resource image = null; if (tableName.contains("ACT_HI")) { image = Images.DATABASE_HISTORY; } else if (tableName.contains("ACT_RU")) { image = Images.DATABASE_RUNTIME; } else if (tableName.contains("ACT_RE")) { image = Images.DATABASE_REPOSITORY; } else if (tableName.contains("ACT_ID")) { image = Images.DATABASE_IDENTITY; } else { image = Images.DATABASE_22; } return new Embedded(null, image); } }