Classifies a type. This returns an integer code identifying the type as one of the primitive
types, one of the array types, one of the list types, or a generic FS type (anything else).
The
LowLevelCAS#ll_getTypeClass(int) method classifies primitives and array types,
but does not have a special classification for list types, which we need for XMI
serialization. Therefore, in addition to the type codes defined on
LowLevelCAS, this
method can return one of the type codes TYPE_CLASS_INTLIST, TYPE_CLASS_FLOATLIST,
TYPE_CLASS_STRINGLIST, or TYPE_CLASS_FSLIST defined on
XmiCasSerializer interface.