Java tutorial
//package com.java2s; /* * JBoss, Home of Professional Open Source * Copyright 2005, JBoss Inc., and individual contributors as indicated * by the @authors tag. See the copyright.txt in the distribution for a * full listing of individual contributors. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ import java.util.ArrayList; import java.util.List; import java.util.Set; import javax.xml.namespace.QName; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class Main { public static List<Element> elementsQName(final Element element, final Set<QName> allowedTagNames) { List<Element> elements = null; final NodeList nodeList = element.getChildNodes(); if (nodeList != null) { for (int i = 0; i < nodeList.getLength(); i++) { final Node child = nodeList.item(i); if (Element.class.isAssignableFrom(child.getClass())) { final Element childElement = (Element) child; final QName childElementQName = new QName(childElement.getNamespaceURI(), childElement.getLocalName()); if (allowedTagNames.contains(childElementQName)) { if (elements == null) { elements = new ArrayList<Element>(); } elements.add(childElement); } } } } return elements; } public static String getNamespaceURI(final org.w3c.dom.Node n, final String prefix) { final Node prefixDeclaration = n.getAttributes().getNamedItem("xmlns:" + prefix); if (prefixDeclaration != null) { // we have found the good NameSpace return prefixDeclaration.getNodeValue(); } // we have found the good NameSpace // we look for the NameSpace in the parent Node return getNamespaceURI(n.getParentNode(), prefix); } }