= Josh Moore, April/2007

  class Validators implements List<Validator>, Validator{} // Composite pattern

  List<Validator> list = iObject.getValidators();
  // list them 
  // or
  Validators validators = iObject.getValidators; 
  validators.validateInsert(iObject);
  validators.validateUpdate(iObject);
  validators.validateDelete(iObject);

Implementation

• use an new OmeroContext("ome.validation") which wraps "ome.server" when available giving the validators access to the DB.

Possible Uses

• Keeping reverse links on attributes in-sync
• Implementing security (Currently, who can delete what is hard-coded in the security system)