XOM API for Processing XML with Java

[Peter Murray-Rust <pm286 AT cam.ac.uk>]

I have isolated the problem with insertChild and am now running the latest
(today, 1.2.2 version of XOM). The following code allows the insertion of a
child beyond child count and fills the intervening children as nulls:

import java.io.IOException;

import nu.xom.Document;
import nu.xom.Element;
import nu.xom.Serializer;

public class TestXOM {

    public static void main(String[] args) {
        Element parent = new Element("p");
        for (int i = 0; i < 3; i++) {
            Element c = new Element("c");
            parent.appendChild(c);
        }
        System.out.println(parent.getChildCount());
        Element d = new Element("d");
        // should this throw an IndexOutOfBoundsException -
        // if the position is negative or greater than the number of
children of this node
        parent.insertChild(d, 5);
        System.out.println(parent.getChildCount());
        System.out.println(parent.getChild(3));
        Serializer s = new Serializer(System.out);
        try {
            s.write(new Document(parent));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

gives:

3
4
null
Exception in thread "main" java.lang.NullPointerException
    at nu.xom.Serializer.writeChild(Unknown Source)
    at nu.xom.Serializer.write(Unknown Source)
    at nu.xom.Serializer.writeChild(Unknown Source)
    at nu.xom.Serializer.write(Unknown Source)
    at testxom.TestXOM.main(TestXOM.java:26)

If this is not a bug, please let me know what I am doing wrong.

TIA

P.


-- 
Peter Murray-Rust
Reader in Molecular Informatics
Unilever Centre, Dep. Of Chemistry
University of Cambridge
CB2 1EW, UK
+44-1223-763069