Package org.xmldb.xupdate.lexus.commands

Source Code of org.xmldb.xupdate.lexus.commands.InsertElement

package org.xmldb.xupdate.lexus.commands;

/*
*  The XML:DB Initiative Software License, Version 1.0
*
*
* Copyright (c) 2000-2003 The XML:DB Initiative.  All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 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 end-user documentation included with the redistribution,
*    if any, must include the following acknowledgment:
*       "This product includes software developed by the
*        XML:DB Initiative (http://www.xmldb.org/)."
*    Alternately, this acknowledgment may appear in the software itself,
*    if and wherever such third-party acknowledgments normally appear.
*
* 4. The name "XML:DB Initiative" must not be used to endorse or
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*
* 5. Products derived from this software may not be called "XML:DB",
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* ====================================================================
*
* This software consists of voluntary contributions made by many
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import org.apache.xml.utils.PrefixResolver;
import org.apache.xml.utils.PrefixResolverDefault;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
*
* @version $Id: InsertElement.java,v 1.8 2003/05/21 08:17:38 jbreedveld Exp $
* @author <a href="http://www.smb-tec.com">SMB</a>
*/
public class InsertElement extends InsertStates {

  /**
   *
   */
  public InsertElement() {
    super();
  }


  /**
   *
   */
  public Node execute(Node contextNode) throws Exception {
    if (attributes == null) {
      throw new Exception("no attributes for element constructor!");
    }
    String namespaceURI = (String) attributes.get("namespace");
    String qName = (String) attributes.get("name");
    if (qName == null) {
      throw new Exception("no name attribute for element constructor!");
    }
    Document document = contextNode.getOwnerDocument();
    Node element;
    if (namespaceURI != null && namespaceURI.equals("")) {
      namespaceURI = null;
    }
    element = document.createElementNS(namespaceURI, qName);
    // now check namespaceURI != null no longer qName.indexOf( ":" )>=0
    if (namespaceURI != null) {
      String prefix = element.getPrefix();
      if (prefix == null) {
        /**
         * This is the default xmlns="namespace-uri" attribute case.
         * Look for default xmlns="namespace-uri" attributes in parent elements
         */
        if (!hasDefaultNamespace(contextNode, namespaceURI)) {
          ((Element) element).setAttributeNS("http://www.w3.org/2000/xmlns/",
                  "xmlns", namespaceURI);
        }
      } else {
        /**
         * Look for existing namespace declaration with same prefix.
         * If it exists a namespace declaration doesn't has to be added
         * If it exists but the URI is not the same a namespace
         * declaration has to be added
         *
         * Other prefixes with same URI are ignored. This is something to
         * talk about on mailinglist and a to WD
         */
        PrefixResolver prefixResolver = new PrefixResolverDefault(contextNode);
        String uri = prefixResolver.getNamespaceForPrefix(prefix);
        if (uri == null || !uri.equalsIgnoreCase(namespaceURI)) {
          ((Element) element).setAttributeNS("http://www.w3.org/2000/xmlns/",
                  "xmlns:" + prefix, namespaceURI);
        }
      }
    }
    int charactersSize = characters.size();
    for (int i = 0; i < charactersSize; i++) {
      element.appendChild(document.createTextNode((String) characters.elementAt(i)));
    }
    return contextNode.appendChild(element);
  }
}
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