CODEWITHSUNDEEP
javasaxdoctype
Uwe Allner
Uwe Allner

Reputation: 3467

SAX parser does not call startDTD

I have followed Obtaining DOCTYPE details using SAX (JDK 7), implementing it like this:

public class MyXmlReader {

    public static void parse(InputSource inputSource) {
        try {
            XMLReader xmlReader = XMLReaderFactory.createXMLReader();

            MyContentHandler handler = new MyContentHandler(); 
            xmlReader.setContentHandler(handler);
            xmlReader.setProperty("http://xml.org/sax/properties/lexical-handler", handler);    // Does not work; handler is set, but startDTD/endDTD is not called
            xmlReader.setDTDHandler(handler);
            xmlReader.setErrorHandler(new MyErrorHandler());
            xmlReader.setFeature("http://xml.org/sax/features/validation", false);
            xmlReader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
            xmlReader.parse(inputSource);
        }
        catch (SAXException e) {
            throw new MyImportException("Error while parsing file", e);
        }
    }
}

MyContentHandler extends DefaultHandler2, but neither startDTD nor endDTD is called (but e.g. startEntity is in fact called, so the lexical handler is set). I have tried to leave the features out, but this changes nothing.

What goes wrong here? I am using Java 8 JDK 1.8.0_144.

The XML looks like this:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE MyMessage SYSTEM "http://www.testsite.org/mymessage/5.1/reference/international.dtd">
<MyMessage>
    <Header>
    ...

Upvotes: 3

Views: 415

Answers (1)

Andre Albert
Andre Albert

Reputation: 1394

According to XMLReader API you need to set a DTD Handler, otherwise DTD Events will be silently ignored. A DefaultHandler2 yet implements DTDHandler interface, so you could use xmlReader.setDTDHandler(handler); again;

Upvotes: 1

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