/*
* 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.bean;
import org.dom4j.Attribute;
import org.dom4j.DocumentFactory;
import org.dom4j.Element;
import org.dom4j.QName;
import org.dom4j.tree.DefaultAttribute;
import org.xml.sax.Attributes;
/**
* <p>
* <code>BeanDocumentFactory</code> is a factory of DOM4J objects which may be
* BeanElements which are backed by JavaBeans and their properties.
* </p>
*
* <p>
* The tree built allows full XPath expressions from anywhere on the tree.
* </p>
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan </a>
* @version $Revision: 1.14 $
*/
public class BeanDocumentFactory extends DocumentFactory {
/** The Singleton instance */
private static BeanDocumentFactory singleton = new BeanDocumentFactory();
/**
* <p>
* Access to the singleton instance of this factory.
* </p>
*
* @return the default singleon instance
*/
public static DocumentFactory getInstance() {
return singleton;
}
// Factory methods
public Element createElement(QName qname) {
Object bean = createBean(qname);
if (bean == null) {
return new BeanElement(qname);
} else {
return new BeanElement(qname, bean);
}
}
public Element createElement(QName qname, Attributes attributes) {
Object bean = createBean(qname, attributes);
if (bean == null) {
return new BeanElement(qname);
} else {
return new BeanElement(qname, bean);
}
}
public Attribute createAttribute(Element owner, QName qname, String value) {
return new DefaultAttribute(qname, value);
}
// Implementation methods
protected Object createBean(QName qname) {
return null;
}
protected Object createBean(QName qname, Attributes attributes) {
String value = attributes.getValue("class");
if (value != null) {
try {
Class beanClass = Class.forName(value, true,
BeanDocumentFactory.class.getClassLoader());
return beanClass.newInstance();
} catch (Exception e) {
handleException(e);
}
}
return null;
}
protected void handleException(Exception e) {
// ignore introspection exceptions
System.out.println("#### Warning: couldn't create bean: " + e);
}
}
/*
* 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.
*/