How to persist multidimensional Java arrays using JPA

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Hi All,

I'm using JPA wit Hibernate on a Derby database and I need to store plain Java arrays like:

Double[][] test = new Double[10][100];

I tried to use @ElementCollection as stated in the JPA documentation without success.

Additionally I tried to convert the 2-dim array into a nested List like "List<List<Double>>". But I couldn't get it running either(MappingException ("Could not determine type for: java.util.List,...).

Does anyone know how to store multidimensional arrays and/or nested Lists?