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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/traversal/TreeWalker.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/traversal/TreeWalker.java | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/traversal/TreeWalker.java b/gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/traversal/TreeWalker.java new file mode 100644 index 000000000..f5fff86be --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/external/w3c_dom/org/w3c/dom/traversal/TreeWalker.java @@ -0,0 +1,179 @@ +/* + * 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; + +/** + * <code>TreeWalker</code> objects are used to navigate a document tree or + * subtree using the view of the document defined by their + * <code>whatToShow</code> flags and filter (if any). Any function which + * performs navigation using a <code>TreeWalker</code> will automatically + * support any view defined by a <code>TreeWalker</code>. + * <p>Omitting nodes from the logical view of a subtree can result in a + * structure that is substantially different from the same subtree in the + * complete, unfiltered document. Nodes that are siblings in the + * <code>TreeWalker</code> view may be children of different, widely + * separated nodes in the original view. For instance, consider a + * <code>NodeFilter</code> that skips all nodes except for Text nodes and + * the root node of a document. In the logical view that results, all text + * nodes will be siblings and appear as direct children of the root node, no + * matter how deeply nested the structure of the original document. + * <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 DOM Level 2 + */ +public interface TreeWalker { + /** + * The <code>root</code> node of the <code>TreeWalker</code>, as specified + * when it was created. + */ + public Node getRoot(); + + /** + * This attribute determines which node types are presented via the + * <code>TreeWalker</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 filter used to screen nodes. + */ + public NodeFilter getFilter(); + + /** + * The value of this flag determines whether the children of entity + * reference nodes are visible to the <code>TreeWalker</code>. If false, + * these children and their descendants will be rejected. Note that + * this rejection takes precedence over <code>whatToShow</code> and the + * filter, if any. + * <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>TreeWalker</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(); + + /** + * The node at which the <code>TreeWalker</code> is currently positioned. + * <br>Alterations to the DOM tree may cause the current node to no longer + * be accepted by the <code>TreeWalker</code>'s associated filter. + * <code>currentNode</code> may also be explicitly set to any node, + * whether or not it is within the subtree specified by the + * <code>root</code> node or would be accepted by the filter and + * <code>whatToShow</code> flags. Further traversal occurs relative to + * <code>currentNode</code> even if it is not part of the current view, + * by applying the filters in the requested direction; if no traversal + * is possible, <code>currentNode</code> is not changed. + */ + public Node getCurrentNode(); + /** + * The node at which the <code>TreeWalker</code> is currently positioned. + * <br>Alterations to the DOM tree may cause the current node to no longer + * be accepted by the <code>TreeWalker</code>'s associated filter. + * <code>currentNode</code> may also be explicitly set to any node, + * whether or not it is within the subtree specified by the + * <code>root</code> node or would be accepted by the filter and + * <code>whatToShow</code> flags. Further traversal occurs relative to + * <code>currentNode</code> even if it is not part of the current view, + * by applying the filters in the requested direction; if no traversal + * is possible, <code>currentNode</code> is not changed. + * @exception DOMException + * NOT_SUPPORTED_ERR: Raised if an attempt is made to set + * <code>currentNode</code> to <code>null</code>. + */ + public void setCurrentNode(Node currentNode) + throws DOMException; + + /** + * Moves to and returns the closest visible ancestor node of the current + * node. If the search for <code>parentNode</code> attempts to step + * upward from the <code>TreeWalker</code>'s <code>root</code> node, or + * if it fails to find a visible ancestor node, this method retains the + * current position and returns <code>null</code>. + * @return The new parent node, or <code>null</code> if the current node + * has no parent in the <code>TreeWalker</code>'s logical view. + */ + public Node parentNode(); + + /** + * Moves the <code>TreeWalker</code> to the first visible child of the + * current node, and returns the new node. If the current node has no + * visible children, returns <code>null</code>, and retains the current + * node. + * @return The new node, or <code>null</code> if the current node has no + * visible children in the <code>TreeWalker</code>'s logical view. + */ + public Node firstChild(); + + /** + * Moves the <code>TreeWalker</code> to the last visible child of the + * current node, and returns the new node. If the current node has no + * visible children, returns <code>null</code>, and retains the current + * node. + * @return The new node, or <code>null</code> if the current node has no + * children in the <code>TreeWalker</code>'s logical view. + */ + public Node lastChild(); + + /** + * Moves the <code>TreeWalker</code> to the previous sibling of the + * current node, and returns the new node. If the current node has no + * visible previous sibling, returns <code>null</code>, and retains the + * current node. + * @return The new node, or <code>null</code> if the current node has no + * previous sibling. in the <code>TreeWalker</code>'s logical view. + */ + public Node previousSibling(); + + /** + * Moves the <code>TreeWalker</code> to the next sibling of the current + * node, and returns the new node. If the current node has no visible + * next sibling, returns <code>null</code>, and retains the current node. + * @return The new node, or <code>null</code> if the current node has no + * next sibling. in the <code>TreeWalker</code>'s logical view. + */ + public Node nextSibling(); + + /** + * Moves the <code>TreeWalker</code> to the previous visible node in + * document order relative to the current node, and returns the new + * node. If the current node has no previous node, or if the search for + * <code>previousNode</code> attempts to step upward from the + * <code>TreeWalker</code>'s <code>root</code> node, returns + * <code>null</code>, and retains the current node. + * @return The new node, or <code>null</code> if the current node has no + * previous node in the <code>TreeWalker</code>'s logical view. + */ + public Node previousNode(); + + /** + * Moves the <code>TreeWalker</code> to the next visible node in document + * order relative to the current node, and returns the new node. If the + * current node has no next node, or if the search for nextNode attempts + * to step upward from the <code>TreeWalker</code>'s <code>root</code> + * node, returns <code>null</code>, and retains the current node. + * @return The new node, or <code>null</code> if the current node has no + * next node in the <code>TreeWalker</code>'s logical view. + */ + public Node nextNode(); + +} |