Using XPath for expression in Java

Question

When evaluating an XPath for expression in Java, example:

        String expr = "for $x in * return $x";

        NodeList nodeList = (NodeList) m_xpath.evaluate(
                expr, 
                docXML, XPathConstants.NODESET);

I get an error:

        javax.xml.xpath.XPathExpressionException: javax.xml.transform.TransformerException: Extra illegal tokens: '$', 'x', 'in', ...

I realize I could simply use * as the value of expr, but I am trying to understand how to use the XPath for expressions in Java.

kjhughes · Accepted Answer · 2020-01-09 18:41:11Z

4

Despite other answers and comments, for $x in * return $x is XPath. However, for requires XPath 2.0 (or greater), but the default implementation of the javax.xml.xpath API only supports XPath 1.0.

Consider using Saxonica's implementations for excellent XPath 2.0+ support in Java (and .NET).

edited Jan 9, 2020 at 18:41

answered Jan 9, 2020 at 15:11

kjhughes

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