/*
    * 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 java.util.List;
  
  import org.dom4j.Attribute;
  import org.dom4j.DocumentFactory;
  import org.dom4j.Element;
  import org.dom4j.Namespace;
  import org.dom4j.QName;
  import org.dom4j.tree.DefaultElement;
  import org.dom4j.tree.NamespaceStack;
  
  import org.xml.sax.Attributes;
  
  /***
   * <p>
   * <code>BeanElement</code> uses a Java Bean to store its attributes.
   * </p>
   * 
   * @author <a href="mailto:jstrachan@apache.org">James Strachan </a>
   * @version $Revision: 1.15 $
   */
  public class BeanElement extends DefaultElement {
      /*** The <code>DocumentFactory</code> instance used by default */
      private static final DocumentFactory DOCUMENT_FACTORY = BeanDocumentFactory
              .getInstance();
  
      /*** The JavaBean which defines my attributes */
      private Object bean;
  
      public BeanElement(String name, Object bean) {
          this(DOCUMENT_FACTORY.createQName(name), bean);
      }
  
      public BeanElement(String name, Namespace namespace, Object bean) {
          this(DOCUMENT_FACTORY.createQName(name, namespace), bean);
      }
  
      public BeanElement(QName qname, Object bean) {
          super(qname);
          this.bean = bean;
      }
  
      public BeanElement(QName qname) {
          super(qname);
      }
  
      /***
       * DOCUMENT ME!
       * 
       * @return the JavaBean associated with this element
       */
      public Object getData() {
          return bean;
      }
  
      public void setData(Object data) {
          this.bean = data;
  
          // force the attributeList to be lazily
          // created next time an attribute related
          // method is called again.
          setAttributeList(null);
      }
  
      public Attribute attribute(String name) {
          return getBeanAttributeList().attribute(name);
      }
  
      public Attribute attribute(QName qname) {
          return getBeanAttributeList().attribute(qname);
      }
  
      public Element addAttribute(String name, String value) {
          Attribute attribute = attribute(name);
  
          if (attribute != null) {
              attribute.setValue(value);
          }
  
          return this;
      }
  
      public Element addAttribute(QName qName, String value) {
          Attribute attribute = attribute(qName);
  
          if (attribute != null) {
              attribute.setValue(value);
          }
  
          return this;
      }
 
     public void setAttributes(List attributes) {
         throw new UnsupportedOperationException("Not implemented yet.");
     }
 
     // Method overridden from AbstractElement
     public void setAttributes(Attributes attributes,
             NamespaceStack namespaceStack, boolean noNamespaceAttributes) {
         String className = attributes.getValue("class");
 
         if (className != null) {
             try {
                 Class beanClass = Class.forName(className, true,
                         BeanElement.class.getClassLoader());
                 this.setData(beanClass.newInstance());
 
                 for (int i = 0; i < attributes.getLength(); i++) {
                     String attributeName = attributes.getLocalName(i);
 
                     if (!"class".equalsIgnoreCase(attributeName)) {
                         addAttribute(attributeName, attributes.getValue(i));
                     }
                 }
             } catch (Exception ex) {
                 // What to do here?
                 ((BeanDocumentFactory) this.getDocumentFactory())
                         .handleException(ex);
             }
         } else {
             super.setAttributes(attributes, namespaceStack,
                     noNamespaceAttributes);
         }
     }
 
     // Implementation methods
     // -------------------------------------------------------------------------
     protected DocumentFactory getDocumentFactory() {
         return DOCUMENT_FACTORY;
     }
 
     protected BeanAttributeList getBeanAttributeList() {
         return (BeanAttributeList) attributeList();
     }
 
     /***
      * A Factory Method pattern which lazily creates a List implementation used
      * to store content
      * 
      * @return DOCUMENT ME!
      */
     protected List createAttributeList() {
         return new BeanAttributeList(this);
     }
 
     protected List createAttributeList(int size) {
         return new BeanAttributeList(this);
     }
 }
 
 /*
  * 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.
  */