Question

I’m having an issue with a small program that I wrote. It does what I intended it to do (add/remove/modify attributes) very well – I’m super excited about that part. But when I output the file, my headers change and some elements have attributes added to them automatically.

Here’s what I start with:

<!DOCTYPE TEI SYSTEM "teilite-ur.dtd">
<TEI xmlns="http://www.tei-c.org/ns/1.0">
    <teiHeader>
        <fileDesc>
...
<availability>
...

After transforming each element node to contain an additional attribute(name=test,value=working), here’s what I end up with:

<TEI xmlns="http://www.tei-c.org/ns/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" test="working">
    <teiHeader test="working" type="text">
        <fileDesc test="working">
...
<availability default="false" status="unknown" test="working">
...

So, short overview:

• !DOCTYPE line was removed
• xmlns:xsi… was added
• type=”text”, default=”false”, status=”unknown” anchored=”true” attributes are added automatically (there may be others, but those are the ones that popped out at me).

I read in here [http://stackoverflow.com/questions/2133395/remove-xml-declaration-from-the-generated-xml-document-using-java] how to prevent the XML declaration from being added to the top. But, I’m not sure how to disable the rest of the additions.

Thanks!

Here’s some self-contained code that does basically what I want it to (little more customization in the real program, but that shouldn’t be relevant) and the relevant IBM tutorial that I used to help build it:

package xml_attrib_test;

import java.io.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import javax.xml.xpath.*;
import org.w3c.dom.*;

public class Main {

    public static void main(String[] args) {
        //Input
        File whichFile = new File("C:\\Users\\mw2xx\\Desktop\\proceedings.vol1.xml");

        DocumentBuilderFactory domFactory;
        DocumentBuilder builder;
        Document doc;
        XPathFactory factory;
        XPath xpath;
        XPathExpression expr;
        NodeList nodes;

        try {
            domFactory = DocumentBuilderFactory.newInstance();
            domFactory.setSchema(null);
            domFactory.setValidating(false);
            domFactory.setNamespaceAware(true);
            domFactory.setExpandEntityReferences(false);
            builder = domFactory.newDocumentBuilder();
            doc = builder.parse(whichFile);

            factory = XPathFactory.newInstance();
            xpath = factory.newXPath();
            expr = xpath.compile("//*");

            Object result = expr.evaluate(doc, XPathConstants.NODESET);
            nodes = (NodeList) result;
        } catch (Exception ex) {
            System.out.println("Error in parser.");
            return;
        }

        // Do Stuff With the XML Doc

        String attributeTag = "test";
        String attrValue = "working";

        for (int j = 0; j < nodes.getLength(); j++) {
            Node n = nodes.item(j);

            if (n.getNodeType() == Node.ELEMENT_NODE) {
                Element e = (Element) n;
                e.setAttribute(attributeTag, attrValue);
            } else if (n.getNodeType() == Node.ATTRIBUTE_NODE) {
                Attr a = (Attr) n;
                if (a.getName().equals(attributeTag)) {
                    a.setValue(attrValue);
                }
            }
        }

        // Output
        TransformerFactory tFactory;
        Transformer transformer;
        DOMSource source;
        File resultFile;
        StreamResult result;

        try {
            tFactory = TransformerFactory.newInstance();
            transformer = tFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");

            source = new DOMSource(doc);
            resultFile = new File("$$$$$.tmp");
            result = new StreamResult(resultFile);
            transformer.transform(source, result);
        } catch (Exception ex) {
            System.out.println("Error in transformer.");
            return;
        }

        whichFile.delete();
        resultFile.renameTo(whichFile);

        System.out.println("Success!");
    }
}

Answer 1

After a few more days of googling and searching stack overflow I found a similar question which provided the setting I needed.

domFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);

Java change and move non-standard XML file