Source for org.w3c.dom.UserDataHandler

   1: /*
   2:  * Copyright (c) 2004 World Wide Web Consortium,
   3:  *
   4:  * (Massachusetts Institute of Technology, European Research Consortium for
   5:  * Informatics and Mathematics, Keio University). All Rights Reserved. This
   6:  * work is distributed under the W3C(r) Software License [1] in the hope that
   7:  * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
   8:  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   9:  *
  10:  * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
  11:  */
  12: 
  13: package org.w3c.dom;
  14: 
  15: /**
  16:  * When associating an object to a key on a node using
  17:  * <code>Node.setUserData()</code> the application can provide a handler
  18:  * that gets called when the node the object is associated to is being
  19:  * cloned, imported, or renamed. This can be used by the application to
  20:  * implement various behaviors regarding the data it associates to the DOM
  21:  * nodes. This interface defines that handler.
  22:  * <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>.
  23:  * @since DOM Level 3
  24:  */
  25: public interface UserDataHandler {
  26:     // OperationType
  27:     /**
  28:      * The node is cloned, using <code>Node.cloneNode()</code>.
  29:      */
  30:     public static final short NODE_CLONED               = 1;
  31:     /**
  32:      * The node is imported, using <code>Document.importNode()</code>.
  33:      */
  34:     public static final short NODE_IMPORTED             = 2;
  35:     /**
  36:      * The node is deleted.
  37:      * <p ><b>Note:</b> This may not be supported or may not be reliable in
  38:      * certain environments, such as Java, where the implementation has no
  39:      * real control over when objects are actually deleted.
  40:      */
  41:     public static final short NODE_DELETED              = 3;
  42:     /**
  43:      * The node is renamed, using <code>Document.renameNode()</code>.
  44:      */
  45:     public static final short NODE_RENAMED              = 4;
  46:     /**
  47:      * The node is adopted, using <code>Document.adoptNode()</code>.
  48:      */
  49:     public static final short NODE_ADOPTED              = 5;
  50: 
  51:     /**
  52:      * This method is called whenever the node for which this handler is
  53:      * registered is imported or cloned.
  54:      * <br> DOM applications must not raise exceptions in a
  55:      * <code>UserDataHandler</code>. The effect of throwing exceptions from
  56:      * the handler is DOM implementation dependent.
  57:      * @param operation Specifies the type of operation that is being
  58:      *   performed on the node.
  59:      * @param key Specifies the key for which this handler is being called.
  60:      * @param data Specifies the data for which this handler is being called.
  61:      * @param src Specifies the node being cloned, adopted, imported, or
  62:      *   renamed. This is <code>null</code> when the node is being deleted.
  63:      * @param dst Specifies the node newly created if any, or
  64:      *   <code>null</code>.
  65:      */
  66:     public void handle(short operation,
  67:                        String key,
  68:                        Object data,
  69:                        Node src,
  70:                        Node dst);
  71: 
  72: }