XMLFilter exception

From: Timo Nentwig (tcn_at_spamgourmet.com)
Date: 02/07/04 

Date: Sat, 07 Feb 2004 14:04:47 +0100

Hi!

I hacked a tiny XMLFilter in order to filter <script> elements. But it
throws the following exception (on certain input documents, not all and,
alas, I were not able to locate the problem):

org.dom4j.DocumentException: The node "org.dom4j.tree.DefaultElement@18e3e60
[Element: <HTML attributes: []/>]" could not be added to the branch "null"
because: Cannot add another element to this Document as it already has a
root element of: HTML Nested exception: The node
"org.dom4j.tree.DefaultElement@18e3e60 [Element: <HTML attributes: []/>]"
could not be added to the branch "null" because: Cannot add another element
to this Document as it already has a root element of: HTML

public class XmlFilter extends XMLFilterImpl
{
        private final String name = "script";
        private boolean remove = false;
        
        public XmlFilter()
        {
                super();
        }

        public void startElement(String namespaceUri, String localName, String
qualifiedName, Attributes attributes) throws SAXException
        {
                if (remove = remove || localName.equalsIgnoreCase(name)) return;
                super.startElement(namespaceUri, localName, qualifiedName, attributes);
        }

        public void characters(char[] ch, int start, int length) throws
SAXException
        {
                if (remove) return;
                super.characters(ch, start, length);
        }

        public void endElement(String uri, String localName, String qName) throws
SAXException
        {
                if (remove = localName.equalsIgnoreCase(name)) return;
                super.endElement(uri, localName, qName);
        }
}

Can somebody help?

TIA
TImo

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