Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2012-2014 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2014 The OpenNMS Group, Inc. * * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. * * OpenNMS(R) is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * OpenNMS(R) 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 OpenNMS(R). If not, see: * http://www.gnu.org/licenses/ * * For more information contact: * OpenNMS(R) Licensing <license@opennms.org> * http://www.opennms.org/ * http://www.opennms.com/ *******************************************************************************/ package org.opennms.features.vaadin.datacollection; import java.util.ArrayList; import java.util.Collections; import java.util.List; import org.opennms.features.vaadin.api.OnmsBeanContainer; import org.opennms.netmgt.config.api.DataCollectionConfigDao; import org.opennms.netmgt.config.datacollection.IncludeCollection; import org.vaadin.dialogs.ConfirmDialog; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Component; import com.vaadin.ui.CustomField; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Notification; import com.vaadin.ui.Table; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.Button.ClickEvent; /** * The Include Collection Field. * * @author <a href="mailto:agalue@opennms.org">Alejandro Galue</a> */ @SuppressWarnings("serial") public class IncludeCollectionField extends CustomField<List<IncludeCollection>> { /** The Constant serialVersionUID. */ private static final long serialVersionUID = 3677540981240383672L; /** The Container. */ private final OnmsBeanContainer<IncludeCollectionWrapper> container = new OnmsBeanContainer<IncludeCollectionWrapper>( IncludeCollectionWrapper.class); /** The Include Field Table. */ private final Table table = new Table("Includes List", container); /** The Toolbar. */ private final HorizontalLayout toolbar = new HorizontalLayout(); /** * Instantiates a new include collection field. * * @param dataCollectionConfigDao the data collection configuration DAO */ public IncludeCollectionField(final DataCollectionConfigDao dataCollectionConfigDao) { setCaption("Include Collections"); table.addStyleName("light"); table.setVisibleColumns(new Object[] { "type", "value" }); table.setColumnHeaders(new String[] { "Type", "Value" }); table.setEditable(!isReadOnly()); table.setSelectable(true); table.setImmediate(true); table.setHeight("125px"); table.setWidth("100%"); final Button add = new Button("Add", new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { final IncludeCollectionWrapper obj = new IncludeCollectionWrapper(); IncludeCollectionWindow w = new IncludeCollectionWindow(dataCollectionConfigDao, container, obj) { @Override public void fieldChanged() { container.addBean(obj); table.select(obj); } }; getUI().addWindow(w); } }); final Button edit = new Button("Edit", new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { final Object value = table.getValue(); if (value == null) { Notification.show("Please select a IncludeCollection from the table."); return; } IncludeCollectionWindow w = new IncludeCollectionWindow(dataCollectionConfigDao, container, container.getOnmsBean(value)) { @Override public void fieldChanged() { } }; getUI().addWindow(w); } }); final Button delete = new Button("Delete", new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { deleteHandler(); } }); toolbar.addComponent(add); toolbar.addComponent(edit); toolbar.addComponent(delete); toolbar.setVisible(table.isEditable()); } /* (non-Javadoc) * @see com.vaadin.ui.CustomField#initContent() */ @Override public Component initContent() { VerticalLayout layout = new VerticalLayout(); layout.addComponent(table); layout.addComponent(toolbar); layout.setComponentAlignment(toolbar, Alignment.MIDDLE_RIGHT); return layout; } /* (non-Javadoc) * @see com.vaadin.ui.AbstractField#getType() */ @Override @SuppressWarnings("unchecked") public Class<? extends List<IncludeCollection>> getType() { // Check org.opennms.netmgt.config.datacollection.SnmpCollection.getIncludeCollections() return (Class<? extends List<IncludeCollection>>) Collections .unmodifiableList(new ArrayList<IncludeCollection>()).getClass(); } /* (non-Javadoc) * @see com.vaadin.ui.AbstractField#setInternalValue(java.lang.Object) */ @Override protected void setInternalValue(List<IncludeCollection> includeCollections) { container.removeAllItems(); for (IncludeCollection ic : includeCollections) { container.addBean(new IncludeCollectionWrapper(ic)); } } /* (non-Javadoc) * @see com.vaadin.ui.AbstractField#getInternalValue() */ @Override protected List<IncludeCollection> getInternalValue() { final List<IncludeCollection> beans = new ArrayList<IncludeCollection>(); for (IncludeCollectionWrapper wrapper : container.getOnmsBeans()) { beans.add(wrapper.createIncludeCollection()); } return beans; } /* (non-Javadoc) * @see com.vaadin.ui.AbstractComponent#setReadOnly(boolean) */ @Override public void setReadOnly(boolean readOnly) { table.setEditable(!readOnly); toolbar.setVisible(!readOnly); super.setReadOnly(readOnly); } /** * Delete handler. */ private void deleteHandler() { final Object itemId = table.getValue(); if (itemId == null) { Notification.show("Please select a IncludeCollection from the table."); return; } ConfirmDialog.show(getUI(), "Are you sure?", "Do you really want to remove the selected Include Collection field?\nThis action cannot be undone.", "Yes", "No", new ConfirmDialog.Listener() { public void onClose(ConfirmDialog dialog) { if (dialog.isConfirmed()) { table.removeItem(itemId); } } }); } }