FWD » Core Development » Database

Based on information provided by runtime methods to define and prepare a dynamically generated temp-table, we need to generate a DMO interface and a DMO implementation class, and to load these with a custom class loader at runtime. The proposed approach:

• use the information provided by converted 4GL methods for defining a temp-table to generate a .dict-compatible AST (also need to persist this for use with dynamically defined queries as noted in #1652);
• execute TRPL in the P2J runtime to run schema conversion against this AST, ultimately creating Java source code for the interface and class;
• adapt the in-memory Java compilation and class-loading technique used in the regression test harness to load the interface and class into the JVM.

The custom classloader also will need to be able to unload the interface and class when no longer in use. We should implement this ability in the classloader, but implementing the associated logic to determine when this code is appropriate to unload can be deferred to M11.