[Simple-support] NullPointerException when trying to serialize map keyed by generic class

[Rob G. <rob...@qu...>]

Hello,

The following code in a class that is to be serialized

   @ElementMap(keyType=Class.class, valueType = Component.class)
   Map<Class<? extends Component>, Component> components = new HashMap<Class<? extends Component>, Component>();

results in a NullPointerException in Simple 1.7.2

java.lang.NullPointerException
        at org.simpleframework.xml.load.Signature.getEntry(Signature.java:102)
        at org.simpleframework.xml.load.ElementMapLabel.getEntry(ElementMapLabel.java:136)
        at org.simpleframework.xml.load.CacheLabel.<init>(CacheLabel.java:105)
        at org.simpleframework.xml.load.LabelFactory.getInstance(LabelFactory.java:65)
        at org.simpleframework.xml.load.Scanner.process(Scanner.java:558)
        at org.simpleframework.xml.load.Scanner.scan(Scanner.java:514)
        at org.simpleframework.xml.load.Scanner.field(Scanner.java:473)
        at org.simpleframework.xml.load.Scanner.process(Scanner.java:457)
        at org.simpleframework.xml.load.Scanner.scan(Scanner.java:344)
        at org.simpleframework.xml.load.Scanner.<init>(Scanner.java:126)
        at org.simpleframework.xml.load.ScannerFactory.getInstance(ScannerFactory.java:63)
        at org.simpleframework.xml.load.Factory.getScanner(Factory.java:154)
        at org.simpleframework.xml.load.Factory.getName(Factory.java:171)
        at org.simpleframework.xml.load.Traverser.getName(Traverser.java:236)
        at org.simpleframework.xml.load.Traverser.write(Traverser.java:178)
        at org.simpleframework.xml.load.Traverser.write(Traverser.java:161)
        at org.simpleframework.xml.load.Persister.write(Persister.java:769)
        at org.simpleframework.xml.load.Persister.write(Persister.java:751)
        at org.simpleframework.xml.load.Persister.write(Persister.java:732)
        at org.simpleframework.xml.load.Persister.write(Persister.java:848)

If I change it to

   @ElementMap(keyType=Class.class, valueType = Component.class)
   Map<Class, Component> components = new HashMap<Class, Component>();

 then it  works. Looks like the generified Class trips Simple over.


Thanks,

Rob Griffin
Quest Software
Phone +613 98118021

www.quest.com<http://www.quest.com>