Java tutorial
/* * Copyright 2017-present Open Networking Laboratory * * 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.onosproject.yang.serializers.xml; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.Namespace; import org.onosproject.yang.model.DataNode; import java.util.Stack; /** * Represents an serializer handler to process the XML content and add * element to the stack. */ public abstract class XmlSerializerHandler { /** * Sets the namespace and tag name in element tree maintained in stack. * * @param elementStack element tree stack */ Element processXmlContext(DataNode dataNode, Stack<Element> elementStack) { Element newElement = updateNameAndNamespace(dataNode, elementStack); return newElement; } /** * Returns the new element name by updating tag name and namespace. * * @param node YDT context node * @return new element name by updating tag name and namespace */ Element updateNameAndNamespace(DataNode node, Stack<Element> elementStack) { String nameSpace = null; String name = null; if (node.key() != null && node.key().schemaId() != null) { nameSpace = node.key().schemaId().namespace(); name = node.key().schemaId().name(); } if (elementStack.isEmpty()) { Element rootElement = DocumentHelper.createDocument().addElement(name); if (nameSpace != null) { rootElement.add(Namespace.get(nameSpace)); } return rootElement; } else { /* * If element stack is not empty then root element is already * created. */ Element xmlElement = elementStack.peek(); Element newElement; if (nameSpace != null) { newElement = xmlElement.addElement(name, nameSpace); } else { newElement = xmlElement.addElement(name); } return newElement; } } /** * Sets the leaf value in the current element maintained in stack. * Default behaviour is to do nothing. * * @param domElementStack current element node in the stack * @param dataNode data node */ public void setXmlValue(DataNode dataNode, Stack<Element> domElementStack) { } }