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+/*
+ * 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 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>.
+ */
+ public static final short NODE_CLONED = 1;
+ /**
+ * The node is imported, using <code>Document.importNode()</code>.
+ */
+ public static final 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.
+ */
+ public static final short NODE_DELETED = 3;
+ /**
+ * The node is renamed, using <code>Document.renameNode()</code>.
+ */
+ public static final short NODE_RENAMED = 4;
+ /**
+ * The node is adopted, using <code>Document.adoptNode()</code>.
+ */
+ public static final 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>.
+ */
+ public void handle(short operation,
+ String key,
+ Object data,
+ Node src,
+ Node dst);
+
+}