Java tutorial
/* * Copyright 2016-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.yms.app.ych.defaultcodecs.xml; import org.dom4j.Element; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Iterator; import static org.onosproject.yms.app.ych.defaultcodecs.xml.XmlNodeType.OBJECT_NODE; import static org.onosproject.yms.app.ych.defaultcodecs.xml.XmlNodeType.TEXT_NODE; /** * Represents implementation of codec xml walker. */ class DefaultXmlCodecWalker implements XmlWalker { private final Logger log = LoggerFactory.getLogger(getClass()); @Override public void walk(XmlListener listener, Element element, Element rootElement) { try { Element newElement = element.createCopy(); newElement.remove(element.getNamespace()); listener.enterXmlElement(element, getElementType(newElement), rootElement); if (element.hasContent() && !element.isTextOnly()) { for (Iterator i = element.elementIterator(); i.hasNext();) { Element childElement = (Element) i.next(); walk(listener, childElement, rootElement); } } listener.exitXmlElement(element, getElementType(element), rootElement); } catch (Exception e) { log.error("Exception occurred when walk xml element: {}", element); } } /** * Determine the type of an element. * * @param element to be analysed * @return type of the element */ private XmlNodeType getElementType(Element element) { return element.hasContent() && element.isTextOnly() ? TEXT_NODE : OBJECT_NODE; } }