19-April-2002

The DTD comments should not appear in DOM as a child of Document Node.

This bug can always be reproduced using xercesImpl.jar from b15-2002-04-17 build and the following program:

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import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import java.io.ByteArrayInputStream;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.apache.xml.serialize.XMLSerializer;
import org.apache.xml.serialize.OutputFormat;

public class DTDComments {
public static void main(String[] args) throws Exception {
            String data =
                "<?xml version=\"1.0\" ?>" +
                "<!DOCTYPE root [" +
                "<!ELEMENT root ANY>" +
                "<!-- DTD comment -->" +
                "]>" +
                "<root><!-- comment in instance --><child>data</child></root>";

ByteArrayInputStream in = new ByteArrayInputStream(data.getBytes());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
//dbf.setIgnoringComments(true);
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(in);
Node node = doc.getDocumentElement();
OutputFormat format = new OutputFormat((Document)doc);
XMLSerializer ser = new XMLSerializer(System.out, format);
System.out.println("********Serialize********");
ser.serialize((Document)doc);
System.out.println("\n\nDone");
}
}
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Output:
********Serialize********
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root [<!ELEMENT root ANY>
]>
<!-- DTD comment --><root><!-- comment in instance --><child>data</child></root>

Done
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19-April-2002