[Simple-support] Unable to properly serialize a list containing nulls

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Hi,

public class PersisterFactoryTest {

    @Root
    public static class Foo {
        private List<String> body;
        public Foo(@ElementList(name = "body") List<String> body) {
            this.body = body;
        }
        @ElementList(name = "body")
        public List<String> getBody() {
            return body;
        }
    }

    @Test
    public void testNewDeserializer() throws Exception {
        List<String> body = new ArrayList<String>();
        body.add(null);
        body.add("index 1");
        body.add(null);
        body.add("index 3");
        body.add(null);
        Persister persister = new Persister();
        persister.write(new Foo(body), System.out);
    }
}

I get:

<foo>
   <body class="java.util.ArrayList">
      <string>index 1</string>
      <string>index 3</string>
   </body>
</foo>

Which deserializes to a different list without the nulls in it.

I like my nulls, they keep me warm on a cold winter's night, and make
sure that my array indices are still correct after deserialization. What
can I do to make them come back, please?

Funnily enough, arrays seem to work OK. Just not lists.

S.