Java tutorial
/* * This library is part of OpenCms - * the Open Source Content Management System * * Copyright (c) Alkacon Software GmbH (http://www.alkacon.com) * * This library 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 library 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. * * For further information about Alkacon Software, please see the * company website: http://www.alkacon.com * * For further information about OpenCms, please see the * project website: http://www.opencms.org * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package org.opencms.xml; import java.util.Iterator; import java.util.List; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.Node; import org.dom4j.QName; /** * Provides generic wrappers for XML library methods that do not support Java 5 generic types.<p> * * @since 7.5.1 */ public final class CmsXmlGenericWrapper { /** * Prevents instances of this class from being generated.<p> */ private CmsXmlGenericWrapper() { // NOOP } /** * Provides a type safe / generic wrapper for {@link Element#content()}.<p> * * @param element the element to get the content for * * @return type safe access to {@link Element#content()}.<p> */ @SuppressWarnings("unchecked") public static List<Node> content(Element element) { return element.content(); } public static Iterable<Element> elementIterable(final Element element, final String name) { return new Iterable<Element>() { public Iterator<Element> iterator() { return elementIterator(element, name); } }; } /** * Provides a type safe / generic wrapper for {@link Element#elementIterator(org.dom4j.QName)}.<p> * * @param element the element to iterate * * @return type safe access to {@link Element#elementIterator(org.dom4j.QName)}.<p> */ @SuppressWarnings("unchecked") public static Iterator<Element> elementIterator(Element element) { return element.elementIterator(); } /** * Provides a type safe / generic wrapper for {@link Element#elementIterator(String)}.<p> * * @param element the element to iterate * @param name the element name to match * * @return type safe access to {@link Element#elementIterator(String)}.<p> */ @SuppressWarnings("unchecked") public static Iterator<Element> elementIterator(Element element, String name) { return element.elementIterator(name); } /** * Provides a type safe / generic wrapper for {@link Element#elements()}.<p> * * @param element the element to iterate * * @return type safe access to {@link Element#elements()}.<p> */ @SuppressWarnings("unchecked") public static List<Element> elements(Element element) { return element.elements(); } /** * Provides a type safe / generic wrapper for {@link Element#elements(org.dom4j.QName)}.<p> * * @param element the element to iterate * @param name the element name to match * * @return type safe access to {@link Element#elements(org.dom4j.QName)}.<p> */ @SuppressWarnings("unchecked") public static List<Element> elements(Element element, QName name) { return element.elements(name); } /** * Provides a type safe / generic wrapper for {@link Element#elements(String)}.<p> * * @param element the element to iterate * @param name the element name to match * * @return type safe access to {@link Element#elements(String)}.<p> */ @SuppressWarnings("unchecked") public static List<Element> elements(Element element, String name) { return element.elements(name); } /** * Provides a type safe / generic wrapper for {@link Document#selectNodes(String)}.<p> * * @param doc the document to select the nodes from * @param xpathExpression the XPATH expression to select * * @return type safe access to {@link Document#selectNodes(String)} */ @SuppressWarnings("unchecked") public static List<Node> selectNodes(Document doc, String xpathExpression) { return doc.selectNodes(xpathExpression); } }