Java tutorial
/* * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved. * * This software is open source. * See the bottom of this file for the licence. */ package org.dom4j.tree; import org.dom4j.*; import java.util.List; /** * <p> * <code>BaseElement</code> is a useful base class for implemementation * inheritence of an XML element. * </p> * * @author <a href="mailto:jstrachan@apache.org">James Strachan </a> * @version $Revision: 1.9 $ */ public class BaseElement extends AbstractElement { /** The <code>QName</code> for this element */ private QName qname; /** * Stores the parent branch of this node which is either a Document if this * element is the root element in a document, or another Element if it is a * child of the root document, or null if it has not been added to a * document yet. */ private Branch parentBranch; /** List of content nodes. */ protected List<Node> content; /** list of attributes */ protected List<Attribute> attributes; public BaseElement(String name) { this.qname = getDocumentFactory().createQName(name); } public BaseElement(QName qname) { this.qname = qname; } public BaseElement(String name, Namespace namespace) { this.qname = getDocumentFactory().createQName(name, namespace); } public Element getParent() { Element result = null; if (parentBranch instanceof Element) { result = (Element) parentBranch; } return result; } public void setParent(Element parent) { if (parentBranch instanceof Element || (parent != null)) { parentBranch = parent; } } public Document getDocument() { if (parentBranch instanceof Document) { return (Document) parentBranch; } else if (parentBranch instanceof Element) { Element parent = (Element) parentBranch; return parent.getDocument(); } return null; } public void setDocument(Document document) { if (parentBranch instanceof Document || (document != null)) { parentBranch = document; } } public boolean supportsParent() { return true; } public QName getQName() { return qname; } public void setQName(QName name) { this.qname = name; } public void clearContent() { contentList().clear(); } public void setContent(List<Node> content) { this.content = content; if (content instanceof ContentListFacade) { this.content = ((ContentListFacade<Node>) content).getBackingList(); } } public void setAttributes(List<Attribute> attributes) { this.attributes = attributes; if (attributes instanceof ContentListFacade) { this.attributes = ((ContentListFacade<Attribute>) attributes).getBackingList(); } } // Implementation methods // ------------------------------------------------------------------------- protected List<Node> contentList() { if (content == null) { content = createContentList(); } return content; } protected List<Attribute> attributeList() { if (attributes == null) { attributes = createAttributeList(); } return attributes; } protected List<Attribute> attributeList(int size) { if (attributes == null) { attributes = createAttributeList(size); } return attributes; } protected void setAttributeList(List<Attribute> attributeList) { this.attributes = attributeList; } } /* * Redistribution and use of this software and associated documentation * ("Software"), with or without modification, are permitted provided that the * following conditions are met: * * 1. Redistributions of source code must retain copyright statements and * notices. Redistributions must also contain a copy of this document. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The name "DOM4J" must not be used to endorse or promote products derived * from this Software without prior written permission of MetaStuff, Ltd. For * written permission, please contact dom4j-info@metastuff.com. * * 4. Products derived from this Software may not be called "DOM4J" nor may * "DOM4J" appear in their names without prior written permission of MetaStuff, * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd. * * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org * * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved. */