+from PLC.Faults import *
+from PLC.Parameter import Parameter
+from PLC.Table import Row, Table
+
+class SliceInstantiation(Row):
+ """
+ Representation of a row in the slice_instantiations table. To use,
+ instantiate with a dict of values.
+ """
+
+ table_name = 'slice_instantiations'
+ primary_key = 'instantiation'
+ join_tables = ['slices']
+ fields = {
+ 'instantiation': Parameter(str, "Slice instantiation state", max = 100),
+ }
+
+ def validate_instantiation(self, instantiation):
+ # Make sure name is not blank
+ if not len(instantiation):
+ raise PLCInvalidArgument, "Slice instantiation state name must be specified"
+
+ # Make sure slice instantiation does not alredy exist
+ conflicts = SliceInstantiations(self.api, [instantiation])
+ if conflicts:
+ raise PLCInvalidArgument, "Slice instantiation state name already in use"
+
+ return instantiation
+
+class SliceInstantiations(Table):