grails - How to inherit GORM mapping from non domain class? -

permanently have tables , hibernate classes mapping annotations. , classes have abstract superclass mapping annotations also. in superclass there no table association mapping. tables identified in subclasses. i'm trying migrate mapping gorm model. strategies: tableperhierarchy , tablepersubclass not approach case because tables created , can't changed. created superclass in 'src/groovy/somepackage/' , want inherit mapping , constraints class subclasses in 'domain' folder. constraints works mapping can't find documentation how this. have ideas?

example.

in non-domain folder:

absract class {   string   static mapping = {     column: "column_a"   } }  

in domain folder:

class b extends {   string b   static mapping = {     b column: "column_b"   } } 

and

class c extends {   string c   static mapping = {     c column: "column_c"   } } 

needs 2 tables column 'column_a' in each of them.

it's possible using clone , delegate features. here's did:

class b extends {  static mapping = {     def copymapping = a.mapping.clone()     copymapping.delegate = delegate     copymapping.call()     } }