WorkItem Enumeration values from a DB feed in Project Area?

Can someone help me with this. Does this need a Server Plugin or Javascript or a combination to get what i want?

How to Load WorkItem Enumeration values from Database feed in a project area ?

Also I would like to set the dependent enumeration based on the two enumerations?
e.g.

Enumeration enum1
Values: 1,2,3,4

Enumeration enum2
Values: A,B,C,D,E,F,G,H

Dependent Enum2:
Values: 1
A
B
2
C
D
3
E
F
4
G
H

I want a database feed to update enum1 & enum2
& set enum3 to add the new dependencies of the new value

For eg. the feed need to add enum1 5
enum2 I, J
dependent enum3
5
I
J

Also the same should apply if the database feed removes a value & dependency enum3 values if applicable

An example would be wonderful. I am not much of a java expert but i have folks who can help. ( Clearquest was so much easier for me as perl & the CQ API did all of it). Also is there good documentation on JAVA API & examples for 3.0 ?