content: /*
   * Copyright (c) 2004 World Wide Web Consortium,
   *
   * (Massachusetts Institute of Technology, European Research Consortium for
   * Informatics and Mathematics, Keio University). All Rights Reserved. This
   * work is distributed under the W3C(r) Software License [1] 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.
   *
   * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
   */
  
  package mf.org.w3c.dom;
  
  /**
   * When associating an object to a key on a node using
   * <code>Node.setUserData()</code> the application can provide a handler
   * that gets called when the node the object is associated to is being
   * cloned, imported, or renamed. This can be used by the application to
   * implement various behaviors regarding the data it associates to the DOM
   * nodes. This interface defines that handler.
   * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
   *
   * @since DOM Level 3
   */
  public interface UserDataHandler {
      // OperationType
      /**
       * The node is cloned, using <code>Node.cloneNode()</code>.
       */
      short NODE_CLONED = 1;
      /**
       * The node is imported, using <code>Document.importNode()</code>.
       */
      short NODE_IMPORTED = 2;
      /**
       * The node is deleted.
       * <p ><b>Note:</b> This may not be supported or may not be reliable in
       * certain environments, such as Java, where the implementation has no
       * real control over when objects are actually deleted.
       */
      short NODE_DELETED = 3;
      /**
       * The node is renamed, using <code>Document.renameNode()</code>.
       */
      short NODE_RENAMED = 4;
      /**
       * The node is adopted, using <code>Document.adoptNode()</code>.
       */
      short NODE_ADOPTED = 5;
  
      /**
       * This method is called whenever the node for which this handler is
       * registered is imported or cloned.
       * <br> DOM applications must not raise exceptions in a
       * <code>UserDataHandler</code>. The effect of throwing exceptions from
       * the handler is DOM implementation dependent.
       *
       * @param operation Specifies the type of operation that is being
       *                  performed on the node.
       * @param key       Specifies the key for which this handler is being called.
       * @param data      Specifies the data for which this handler is being called.
       * @param src       Specifies the node being cloned, adopted, imported, or
       *                  renamed. This is <code>null</code> when the node is being deleted.
       * @param dst       Specifies the node newly created if any, or
       *                  <code>null</code>.
       */
      void handle(short operation,
                  String key,
                  Object data,
                  Node src,
                  Node dst);
  
  }
  