2 * Copyright (c) 2000 World Wide Web Consortium,
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3 * (Massachusetts Institute of Technology, Institut National de
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4 * Recherche en Informatique et en Automatique, Keio University). All
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5 * Rights Reserved. This program is distributed under the W3C's Software
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6 * Intellectual Property License. This program is distributed in the
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7 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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8 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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10 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
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13 package org.w3c.dom.traversal;
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15 import org.w3c.dom.Node;
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16 import org.w3c.dom.DOMException;
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19 * <code>DocumentTraversal</code> contains methods that create iterators and
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20 * tree-walkers to traverse a node and its children in document order (depth
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21 * first, pre-order traversal, which is equivalent to the order in which the
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22 * start tags occur in the text representation of the document). In DOMs
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23 * which support the Traversal feature, <code>DocumentTraversal</code> will
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24 * be implemented by the same objects that implement the Document interface.
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25 * <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>.
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26 * @since DOM Level 2
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28 public interface DocumentTraversal {
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30 * Create a new <code>NodeIterator</code> over the subtree rooted at the
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32 * @param rootThe node which will be iterated together with its children.
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33 * The iterator is initially positioned just before this node. The
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34 * <code>whatToShow</code> flags and the filter, if any, are not
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35 * considered when setting this position. The root must not be
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36 * <code>null</code>.
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37 * @param whatToShowThis flag specifies which node types may appear in
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38 * the logical view of the tree presented by the iterator. See the
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39 * description of <code>NodeFilter</code> for the set of possible
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40 * <code>SHOW_</code> values.These flags can be combined using
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42 * @param filterThe <code>NodeFilter</code> to be used with this
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43 * <code>TreeWalker</code>, or <code>null</code> to indicate no filter.
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44 * @param entityReferenceExpansionThe value of this flag determines
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45 * whether entity reference nodes are expanded.
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46 * @return The newly created <code>NodeIterator</code>.
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47 * @exception DOMException
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48 * NOT_SUPPORTED_ERR: Raised if the specified <code>root</code> is
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49 * <code>null</code>.
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51 public NodeIterator createNodeIterator(Node root,
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54 boolean entityReferenceExpansion)
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55 throws DOMException;
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58 * Create a new <code>TreeWalker</code> over the subtree rooted at the
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60 * @param rootThe node which will serve as the <code>root</code> for the
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61 * <code>TreeWalker</code>. The <code>whatToShow</code> flags and the
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62 * <code>NodeFilter</code> are not considered when setting this value;
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63 * any node type will be accepted as the <code>root</code>. The
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64 * <code>currentNode</code> of the <code>TreeWalker</code> is
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65 * initialized to this node, whether or not it is visible. The
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66 * <code>root</code> functions as a stopping point for traversal
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67 * methods that look upward in the document structure, such as
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68 * <code>parentNode</code> and nextNode. The <code>root</code> must
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69 * not be <code>null</code>.
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70 * @param whatToShowThis flag specifies which node types may appear in
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71 * the logical view of the tree presented by the tree-walker. See the
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72 * description of <code>NodeFilter</code> for the set of possible
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73 * SHOW_ values.These flags can be combined using <code>OR</code>.
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74 * @param filterThe <code>NodeFilter</code> to be used with this
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75 * <code>TreeWalker</code>, or <code>null</code> to indicate no filter.
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76 * @param entityReferenceExpansionIf this flag is false, the contents of
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77 * <code>EntityReference</code> nodes are not presented in the logical
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79 * @return The newly created <code>TreeWalker</code>.
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80 * @exception DOMException
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81 * NOT_SUPPORTED_ERR: Raised if the specified <code>root</code> is
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82 * <code>null</code>.
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84 public TreeWalker createTreeWalker(Node root,
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87 boolean entityReferenceExpansion)
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88 throws DOMException;
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