[Simple-support] Strange Nullpointer for ElementMap with generics?

[Fabian K. <fab...@we...>]

Hi Group

I just tried this:

@Root
public class MapTest<K, V> {

	@ElementMap
	public HashMap<K, V> data;

	public MapTest() {
		this.data = new HashMap<K, V>();
	}

	public static void main(String[] args) throws Exception {
		MapTest<String, Integer> mt = new MapTest<String, Integer>();
		mt.data.put("Eins", 1);
		mt.data.put("Vier", 4);
		mt.data.put("Drei", 3);
		Serializer serializer = new Persister();
		serializer.write(mt, System.out);
	}
}

Which failed like:
Exception in thread "main" java.lang.NullPointerException
	at org.simpleframework.xml.core.Signature.getEntry(Signature.java:102)
	at 
org.simpleframework.xml.core.ElementMapLabel.getEntry(ElementMapLabel.java:196)
	at org.simpleframework.xml.core.Signature.getName(Signature.java:196)
	at 
org.simpleframework.xml.core.ElementMapLabel.getName(ElementMapLabel.java:214)
	at org.simpleframework.xml.core.CacheLabel.<init>(CacheLabel.java:119)
	at 
org.simpleframework.xml.core.LabelFactory.getInstance(LabelFactory.java:67)
	at org.simpleframework.xml.core.Scanner.process(Scanner.java:606)
	at org.simpleframework.xml.core.Scanner.scan(Scanner.java:539)
	at org.simpleframework.xml.core.Scanner.field(Scanner.java:498)
	at org.simpleframework.xml.core.Scanner.scan(Scanner.java:348)
	at org.simpleframework.xml.core.Scanner.<init>(Scanner.java:98)
	at 
org.simpleframework.xml.core.ScannerFactory.getInstance(ScannerFactory.java:67)
	at org.simpleframework.xml.core.Support.getScanner(Support.java:161)
	at org.simpleframework.xml.core.Support.getName(Support.java:223)
	at org.simpleframework.xml.core.Source.getName(Source.java:196)
	at org.simpleframework.xml.core.Traverser.getName(Traverser.java:262)
	at org.simpleframework.xml.core.Traverser.write(Traverser.java:185)
	at org.simpleframework.xml.core.Traverser.write(Traverser.java:168)
	at org.simpleframework.xml.core.Persister.write(Persister.java:921)
	at org.simpleframework.xml.core.Persister.write(Persister.java:903)
	at org.simpleframework.xml.core.Persister.write(Persister.java:884)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1000)
	at org.simpleframework.xml.core.Persister.write(Persister.java:982)
	at org.simpleframework.xml.core.Persister.write(Persister.java:963)
	at MapTest.main(MapTest.java:25)

I am quite sure the reason are the generics... anyone knows more about this?

Fabian