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`XMLStreamReader.getAttributeValue(null, localName)` does not ignore namespace URI

See original GitHub issue

i use woodstox-5.1.0 and jackson-2.7.7

Following quick xml-example shows that the function getAttributeValue(…) does not work as expected for resolving an attribute of an xml-element by its localName.

The xml used here is an example from: https://www.w3schools.com/xml/schema_schema.asp

        final String test =
                        "<note xmlns=\"https://www.w3schools.com\"\n" +
                        "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n" +
                        "xsi:schemaLocation=\"https://www.w3schools.com note.xsd\">\n" +
                        "\n" +
                        "<to>Tove</to>\n" +
                        "<from>Jani</from>\n" +
                        "<heading>Reminder</heading>\n" +
                        "<body>Don't forget me this weekend!</body>\n" +
                        "</note> ";

        final InputStream is = new ByteArrayInputStream(test.getBytes(StandardCharsets.UTF_8));

        final XMLInputFactory staxInputFactory = XMLInputFactory.newInstance();
        final XMLStreamReader staxReader = staxInputFactory.createXMLStreamReader(is);

        staxReader.nextTag();

        // returns schemaLocation (correct!)
        final String attributeLocalName = staxReader.getAttributeLocalName(0);
        System.out.println(attributeLocalName);

        // returns value for schemaLocation (correct!)
        final String attributeValue = staxReader.getAttributeValue(0);
        System.out.println(attributeValue);

        // returns NULL (unexpected!)
        final String schemaLocation = staxReader.getAttributeValue(null, "schemaLocation");
        System.out.println(schemaLocation);

Issue Analytics

State:
Created 5 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

1reaction

cowtowncodercommented, Aug 21, 2018

@flappingeagle Ok thank you for including that information: I was not aware of Xerces-backed implementation (nor seen announcements). But class names do seem to suggest such existing. I don’t know if it might be based on old(er) Sun/Xerces implementation (“sjsxp”). Anyway that makes sense wrt your mention of Xerces. 😃

But back to the original question… since Javadoc does indeed state that null should mean “ignore namespace information” that does sound like a deviation from Stax specification.

I will try to see how easy it would be to fix.

Thank you for reporting this.

0reactions

cowtowncodercommented, Aug 23, 2018

Fixed. Attribute value lookup for null namespace case slightly less efficient as it needs linear scan (can’t use hash), but unlikely to be measurable difference. Will be included in 5.2.0, due out soon (will see if I can fix any other bugs).

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