Java tutorial
/** * Copyright (C) 2010-2016 Structr GmbH * * This file is part of Structr <http://structr.org>. * * Structr 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. * * Structr 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 Structr. If not, see <http://www.gnu.org/licenses/>. */ package org.structr.websocket.command.dom; import java.util.Map; import java.util.Map.Entry; import java.util.logging.Level; import java.util.logging.Logger; import org.apache.commons.lang3.StringUtils; import org.structr.common.SecurityContext; import org.structr.common.error.FrameworkException; import org.structr.core.app.StructrApp; import org.structr.core.converter.PropertyConverter; import org.structr.core.graph.NodeInterface; import org.structr.core.property.PropertyKey; import org.structr.web.entity.dom.DOMNode; import org.structr.web.entity.dom.Template; import org.structr.websocket.StructrWebSocket; import org.structr.websocket.command.AbstractCommand; import org.structr.websocket.message.MessageBuilder; import org.structr.websocket.message.WebSocketMessage; import org.w3c.dom.DOMException; import org.w3c.dom.Document; /** * * * */ public class CreateAndAppendDOMNodeCommand extends AbstractCommand { private static final Logger logger = Logger.getLogger(CreateAndAppendDOMNodeCommand.class.getName()); static { StructrWebSocket.addCommand(CreateAndAppendDOMNodeCommand.class); } @Override public void processMessage(WebSocketMessage webSocketData) { final Map<String, Object> nodeData = webSocketData.getNodeData(); final String parentId = (String) nodeData.get("parentId"); final String childContent = (String) nodeData.get("childContent"); final String pageId = webSocketData.getPageId(); nodeData.remove("parentId"); if (pageId != null) { // check for parent ID before creating any nodes if (parentId == null) { getWebSocket().send( MessageBuilder.status().code(422).message("Cannot add node without parentId").build(), true); return; } // check if parent node with given ID exists final DOMNode parentNode = getDOMNode(parentId); if (parentNode == null) { getWebSocket().send(MessageBuilder.status().code(404).message("Parent node not found").build(), true); return; } final Document document = getPage(pageId); if (document != null) { final String tagName = (String) nodeData.get("tagName"); nodeData.remove("tagName"); try { DOMNode newNode; if (tagName != null && "comment".equals(tagName)) { newNode = (DOMNode) document.createComment("#comment"); } else if (tagName != null && "template".equals(tagName)) { newNode = (DOMNode) document.createTextNode("#template"); try { newNode.setProperty(NodeInterface.type, Template.class.getSimpleName()); } catch (FrameworkException fex) { logger.log(Level.WARNING, "Unable to set type of node {1} to Template: {3}", new Object[] { newNode.getUuid(), fex.getMessage() }); } } else if (tagName != null && !tagName.isEmpty()) { newNode = (DOMNode) document.createElement(tagName); } else { newNode = (DOMNode) document.createTextNode("#text"); } // Instantiate node again to get correct class newNode = getDOMNode(newNode.getUuid()); // append new node to parent if (newNode != null) { parentNode.appendChild(newNode); for (Entry entry : nodeData.entrySet()) { final String key = (String) entry.getKey(); final Object val = entry.getValue(); PropertyKey propertyKey = StructrApp.getConfiguration() .getPropertyKeyForDatabaseName(newNode.getClass(), key); if (propertyKey != null) { try { Object convertedValue = val; PropertyConverter inputConverter = propertyKey .inputConverter(SecurityContext.getSuperUserInstance()); if (inputConverter != null) { convertedValue = inputConverter.convert(val); } //newNode.unlockReadOnlyPropertiesOnce(); newNode.setProperty(propertyKey, convertedValue); } catch (FrameworkException fex) { logger.log(Level.WARNING, "Unable to set node property {0} of node {1} to {2}: {3}", new Object[] { propertyKey, newNode.getUuid(), val, fex.getMessage() }); } } } // create a child text node if content is given if (StringUtils.isNotBlank(childContent)) { final DOMNode childNode = (DOMNode) document.createTextNode(childContent); newNode.appendChild(childNode); } } } catch (DOMException dex) { // send DOM exception getWebSocket().send(MessageBuilder.status().code(422).message(dex.getMessage()).build(), true); } } else { getWebSocket().send(MessageBuilder.status().code(404).message("Page not found").build(), true); } } else { getWebSocket().send( MessageBuilder.status().code(422).message("Cannot create node without pageId").build(), true); } } @Override public String getCommand() { return "CREATE_AND_APPEND_DOM_NODE"; } }