How can I change the namespace on every node in a DOM?

Question

How can I, given a w3c DOM (Java\'s default implementation, specifically) change the namespace of every element/attribute/node in that DOM? Efficiently, preferably. The DO

Answer 1

If you are ok with using the Xerces classes, you can create a DOMParser that replaces the URI of attributes and elements with your fixed up URIs:

import org.apache.xerces.parsers.DOMParser;

public static class MyDOMParser extends DOMParser {
    private Map fixupMap = ...;

    @Override
    protected Attr createAttrNode(QName attrQName)
    {
        if (fixupMap.containsKey(attrQName.uri))
            attrQName.uri = fixupMap.get(attrQName.uri);
        return super.createAttrNode(attrQName);
    }

    @Override
    protected Element createElementNode(QName qName)
    {
        if (fixupMap.containsKey(qName.uri))
            qName.uri = fixupMap.get(qName.uri);
        return super.createElementNode(qName);
    }       
}

The elsewhere, you can parse into a DOM Document:

DOMParse p = new MyDOMParser(...);
p.parse(new InputSource(inputStream));
Document doc = p.getDocument();