java/10 : java.xml/org/w3c/dom/traversal/NodeIterator.java

NodeIterator
https://openjdk.java.net/
GPLv2 + Classpath Exception
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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file and, per its terms, should not be removed:
 *
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed 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.
 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.dom.traversal;

import org.w3c.dom.Node;
import org.w3c.dom.DOMException;

NodeIterators are used to step through a set of nodes, e.g.
the set of nodes in a NodeList, the document subtree
governed by a particular Node, the results of a query, or
any other set of nodes. The set of nodes to be iterated is determined by
the implementation of the NodeIterator. DOM Level 2
specifies a single NodeIterator implementation for
document-order traversal of a document subtree. Instances of these
NodeIterators are created by calling
DocumentTraversal.createNodeIterator().
See also the Document Object Model (DOM) Level 2 Traversal and Range Specification.
Since: 9, DOM Level 2/**
 * <code>NodeIterators</code> are used to step through a set of nodes, e.g.
 * the set of nodes in a <code>NodeList</code>, the document subtree
 * governed by a particular <code>Node</code>, the results of a query, or
 * any other set of nodes. The set of nodes to be iterated is determined by
 * the implementation of the <code>NodeIterator</code>. DOM Level 2
 * specifies a single <code>NodeIterator</code> implementation for
 * document-order traversal of a document subtree. Instances of these
 * <code>NodeIterators</code> are created by calling
 * <code>DocumentTraversal</code><code>.createNodeIterator()</code>.
 * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Traversal-Range-20001113'>Document Object Model (DOM) Level 2 Traversal and Range Specification</a>.
 * @since 9, DOM Level 2
 */
public interface NodeIterator {
    The root node of the NodeIterator, as specified when it
was created.
/**
     * The root node of the <code>NodeIterator</code>, as specified when it
     * was created.
     */
    public Node getRoot();

    This attribute determines which node types are presented via the
NodeIterator. The available set of constants is defined
in the NodeFilter interface.  Nodes not accepted by
whatToShow will be skipped, but their children may still
be considered. Note that this skip takes precedence over the filter,
if any.
/**
     * This attribute determines which node types are presented via the
     * <code>NodeIterator</code>. The available set of constants is defined
     * in the <code>NodeFilter</code> interface.  Nodes not accepted by
     * <code>whatToShow</code> will be skipped, but their children may still
     * be considered. Note that this skip takes precedence over the filter,
     * if any.
     */
    public int getWhatToShow();

    The NodeFilter used to screen nodes.
/**
     * The <code>NodeFilter</code> used to screen nodes.
     */
    public NodeFilter getFilter();

     The value of this flag determines whether the children of entity
reference nodes are visible to the NodeIterator. If
false, these children  and their descendants will be rejected. Note
that this rejection takes precedence over whatToShow and
the filter. Also note that this is currently the only situation where
NodeIterators may reject a complete subtree rather than
skipping individual nodes.



 To produce a view of the document that has entity references
expanded and does not expose the entity reference node itself, use
the whatToShow flags to hide the entity reference node
and set expandEntityReferences to true when creating the
NodeIterator. To produce a view of the document that has
entity reference nodes but no entity expansion, use the
whatToShow flags to show the entity reference node and
set expandEntityReferences to false.
/**
     *  The value of this flag determines whether the children of entity
     * reference nodes are visible to the <code>NodeIterator</code>. If
     * false, these children  and their descendants will be rejected. Note
     * that this rejection takes precedence over <code>whatToShow</code> and
     * the filter. Also note that this is currently the only situation where
     * <code>NodeIterators</code> may reject a complete subtree rather than
     * skipping individual nodes.
     * <br>
     * <br> To produce a view of the document that has entity references
     * expanded and does not expose the entity reference node itself, use
     * the <code>whatToShow</code> flags to hide the entity reference node
     * and set <code>expandEntityReferences</code> to true when creating the
     * <code>NodeIterator</code>. To produce a view of the document that has
     * entity reference nodes but no entity expansion, use the
     * <code>whatToShow</code> flags to show the entity reference node and
     * set <code>expandEntityReferences</code> to false.
     */
    public boolean getExpandEntityReferences();

    Returns the next node in the set and advances the position of the
NodeIterator in the set. After a
NodeIterator is created, the first call to
nextNode() returns the first node in the set.
Throws: DOMException – 
  INVALID_STATE_ERR: Raised if this method is called after the
  detach method was invoked.
Returns: The next Node in the set being iterated over, or
  null if there are no more members in that set./**
     * Returns the next node in the set and advances the position of the
     * <code>NodeIterator</code> in the set. After a
     * <code>NodeIterator</code> is created, the first call to
     * <code>nextNode()</code> returns the first node in the set.
     * @return The next <code>Node</code> in the set being iterated over, or
     *   <code>null</code> if there are no more members in that set.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if this method is called after the
     *   <code>detach</code> method was invoked.
     */
    public Node nextNode()
                         throws DOMException;

    Returns the previous node in the set and moves the position of the
NodeIterator backwards in the set.
Throws: DOMException – 
  INVALID_STATE_ERR: Raised if this method is called after the
  detach method was invoked.
Returns: The previous Node in the set being iterated over,
  or null if there are no more members in that set./**
     * Returns the previous node in the set and moves the position of the
     * <code>NodeIterator</code> backwards in the set.
     * @return The previous <code>Node</code> in the set being iterated over,
     *   or <code>null</code> if there are no more members in that set.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if this method is called after the
     *   <code>detach</code> method was invoked.
     */
    public Node previousNode()
                             throws DOMException;

    Detaches the NodeIterator from the set which it iterated
over, releasing any computational resources and placing the
NodeIterator in the INVALID state. After
detach has been invoked, calls to nextNode
or previousNode will raise the exception
INVALID_STATE_ERR.
/**
     * Detaches the <code>NodeIterator</code> from the set which it iterated
     * over, releasing any computational resources and placing the
     * <code>NodeIterator</code> in the INVALID state. After
     * <code>detach</code> has been invoked, calls to <code>nextNode</code>
     * or <code>previousNode</code> will raise the exception
     * INVALID_STATE_ERR.
     */
    public void detach();

}
Throws:	DOMException – INVALID_STATE_ERR: Raised if this method is called after the `detach` method was invoked.
Returns:	The next `Node` in the set being iterated over, or `null` if there are no more members in that set.
/

java/ 10/ java.xml/org/w3c/dom/traversal/NodeIterator.java
