package org.pdf4j.saxon.tinytree;
import org.pdf4j.saxon.om.AxisIteratorImpl;
import org.pdf4j.saxon.om.Item;
import org.pdf4j.saxon.om.NodeInfo;
import org.pdf4j.saxon.om.SequenceIterator;
import org.pdf4j.saxon.pattern.NodeTest;
/**
* This class enumerates the ancestor:: or ancestor-or-self:: axes,
* starting at a given node. The start node will never be the root.
*/
final class AncestorEnumeration extends AxisIteratorImpl {
private TinyNodeImpl startNode;
private NodeTest test;
private boolean includeSelf;
public AncestorEnumeration(TinyNodeImpl node, NodeTest nodeTest, boolean includeSelf) {
test = nodeTest;
startNode = node;
this.includeSelf = includeSelf;
current = startNode;
}
public Item next() {
if (position <= 0) {
if (position < 0) {
return null;
}
if (position==0 && includeSelf && test.matches(startNode)) {
current = startNode;
position = 1;
return current;
}
}
NodeInfo node = current.getParent();
while (node != null && !test.matches(node)) {
node = node.getParent();
}
current = node;
if (node == null) {
position = -1;
} else {
position++;
}
return current;
}
/**
* Get another enumeration of the same nodes
*/
public SequenceIterator getAnother() {
return new AncestorEnumeration(startNode, test, includeSelf);
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
// you may not use this file except in compliance with the License. You may obtain a copy of the
// License at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay.
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//