Creating an Instance of EOGenericRecord

The best way to create an instance of EOGenericRecord is using the EOClassDescription method createInstanceWithEditingContext as follows:

  
  EOEnterpriseObject newEO;
  String entityName;       // Assume this exists.
  EOClassDescription description =
         ClassDescription.classDescriptionForEntityName(entityName);
  newEO = description.createInstanceWithEditingContext(null, null);
  
  

createInstanceWithEditingContext is preferable to using the constructor because the same code works if a custom enterprise object class is later used instead of EOGenericRecord. You can get an EOClassDescription for an entity name as shown above. Alternatively, you can get an EOClassDescription for a destination key of an existing enterprise object as follows:

  

  EOEnterpriseObject newEO;
  EOEnterpriseObject existingEO;   // Assume this exists.
  String relationshipName;         // Assume this exists.
  EOClassDescription sourceDesc = existingEO.classDescription();
  EOClassDescription desc
            = sourceDesc.classDescriptionForDestinationKey(relationshipName);
  newEO = desc.createInstanceWithEditingContext(null, null);
  

The technique in this example is useful for inserting a new destination object into an existing enterprise object for creating a new Movie object to add to a Studio's array of Movies, for example.