Java tutorial
//package com.java2s; /* * Eoulsan development code * * This code may be freely distributed and modified under the * terms of the GNU Lesser General Public License version 2.1 or * later and CeCILL-C. This should be distributed with the code. * If you do not have a copy, see: * * http://www.gnu.org/licenses/lgpl-2.1.txt * http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.txt * * Copyright for this code is held jointly by the Genomic platform * of the Institut de Biologie de l'cole normale suprieure and * the individual authors. These should be listed in @author doc * comments. * * For more information on the Eoulsan project and its aims, * or to join the Eoulsan Google group, visit the home page * at: * * http://outils.genomique.biologie.ens.fr/eoulsan * */ import java.util.ArrayList; import java.util.List; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class Main { /** * Get the list of all the elements of a parent element. * @param parentElement the parent element * @param elementName the name of the element * @return the list of the elements */ public static List<Element> getElementsByTagName(final Element parentElement, final String elementName) { if (elementName == null || parentElement == null) { return null; } final NodeList nStepsList = parentElement.getElementsByTagName(elementName); if (nStepsList == null) { return null; } final List<Element> result = new ArrayList<>(); for (int i = 0; i < nStepsList.getLength(); i++) { final Node node = nStepsList.item(i); if (node.getNodeType() == Node.ELEMENT_NODE) { result.add((Element) node); } } return result; } /** * Get the list of all the first level elements of a document. * @param document the document object * @param elementName the name of the element * @return the list of the elements */ public static List<Element> getElementsByTagName(final Document document, final String elementName) { if (elementName == null || document == null) { return null; } final NodeList nStepsList = document.getElementsByTagName(elementName); if (nStepsList == null) { return null; } final List<Element> result = new ArrayList<>(); for (int i = 0; i < nStepsList.getLength(); i++) { final Node node = nStepsList.item(i); if (node.getNodeType() == Node.ELEMENT_NODE) { result.add((Element) node); } } return result; } }