[ONOS-YANG-DEMO1]Issue after getting serializer registered

Yang :
module demo1 {
yang-version 1;
namespace "namespace1";
prefix "demo1";
revision "2013-07-15";
container device {
list device {
key deviceid;
leaf deviceid

{ type string; }

leaf Customs-supervisor

{ type string; description "name of the customs-supervisor."; }

leaf Merchandiser-supervisor

{ type string; description "name of merchandiser-supervisor"; }

list Material-supervisor {
key "name";
leaf name

{ type string; description "name of logistics-supervisor"; }

leaf departmentId

{ type string; description "name of department"; }

}

container Purchasing-supervisor {
leaf purchasing-specialist

{ type string; description "name of the purchasing-specialist person"; }

leaf-list support

{ type string; description "name of the support person"; }

}

leaf-list Warehouse-supervisor

{ type string; description "name of the warehouse-supervisor's"; }

leaf Trading-supervisor

{ type string; description "name of the trading-supervisor"; }

leaf-list Employee-id

{ type string; description "list of the employee id"; }

}
}
}

Json :
{

"device": [{
"deviceid": "string1-deviceid",
"Customs-supervisor": "string2",
"Merchandiser-supervisor": "string3",
"Warehouse-supervisor": ["string4.1", "string4.2", "string4.3"],
"Trading-supervisor": "string4",
"Employee-id": ["string4.1", "string4.2", "string4.3"],
"Material-supervisor": [

{ "name": "string5", "departmentId": "string6" }

],
"Purchasing-supervisor":

{ "purchasing-specialist": "string7", "support": ["string8.1", "string8.2", "string8.3"] }

}]

}

ERROR :

{ "code": 500, "message": "org.onosproject.yang.runtime.helperutils.SerializerHelper.initializeResourceId(SerializerHelper.java:78)" }