Re: [dom4j-user] Removing Nodes

[Maarten Coene]

What happens if you try "n.detach();" instead of  "doc.remove(n);"
And could you provide us a stacktrace of that NullPointerException?

regards,
Maarten

[EMAIL PROTECTED] wrote:

Hi!

I try to remove all <DIV>s from a Document but this seems to be somewhat tricky :-) I'd prefer to use a Visitor; the code below throws an NullPointerException. The second approach simply doesn't work:

import java.io.FileReader;
import java.util.List;
import java.util.Iterator;

import org.cyberneko.html.parsers.SAXParser;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.VisitorSupport;
import org.dom4j.io.SAXReader;

public class Test
{
        static class KillDivs extends VisitorSupport
        {
                public void visit( Element e )
                {
                        if (e.getName().equalsIgnoreCase("div"))
                        {
                                e.getParent().remove(e);
                                return;
                        }
                }
}
        
        public static void main(String[] args)
        {
                try
                {
                        SAXReader reader = new SAXReader(new SAXParser());
                        Document doc = reader.read(new FileReader("test.html"));
//                      doc.accept(new KillDivs());
                        List divs = doc.selectNodes("//DIV");
                        for (Iterator<Node> iter = divs.iterator(); iter.hasNext(); )
                        {
                                Node n = iter.next();
                                if(n.getName().equalsIgnoreCase("div"))
                                {
                                        doc.remove(n);
                                }                                       
                        }
                        String s = doc.asXML();                 
                        System.out.println(s.indexOf("<DIV>"));
                }
                catch (Exception e)
                {
                        System.err.println("->"+e);
                }
        }

}

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