Descendant axis sometimes includes the context node
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Key: XALANJ-2319
URL: http://issues.apache.org/jira/browse/XALANJ-2319
Project: XalanJ2
Issue Type: Bug
Components: parse-or-compile
Affects Versions: 2.7
Reporter: Igor Peshansky
The following code:
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class Y {
public static void main(String[] stringArr) throws Exception {
DOMImplementation domImpl =
DocumentBuilderFactory.newInstance().newDocumentBuilder().getDOMImplementation();
Document document = domImpl.createDocument(null, "foo", null);
Element element = document.getDocumentElement();
element.appendChild(document.createElement("bar"));
XPath xpath = XPathFactory.newInstance().newXPath();
String result = (String)
xpath.evaluate("name(./descendant::*)", element, XPathConstants.STRING);
System.out.println(result);
}
}
prints "foo", whereas it should have printed "bar". Changing the XPath
expression from "name(./descendant::*)" to "name(self::node()/./descendant::*)"
makes Xalan produce the correct result, but "name(self::node()/descendant::*)"
still exhibits the incorrect behavior.
A bit of debugging shows that when DescendantIterator is created, the
constructor sets the axis to DESCENDANTORSELF, because the first step is a
FROM_SELF (even though the subsequent steps are not supposed to return the self
node).
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