I'm reverse engineering a database to JPA annotated java source. Is there any way to override generateAnnIdGenerator method in EntityPOJOClass.java?

I want to pass in a value for the generator in a similar way to the way that the strategy and strategy properties are passed in. At the moment the GenericGenerator name is hardcoded as "generator" and the GeneratedValue generator value is hardcoded as "generator".

I'd like to have custom names that were determined in a custom reverse engineering strategy class.

Is there any way to do this without building hibernate tools from source having made the changes myself?

no - feel free to submit a patch that fixes the broken generateannidgenerator.