Hello! I am working to retrofit a legacy system using Hibernate. I want to know if using Hibernate I can map several Java classes on the same table using the same key?

Basically, the legacy system has several tables with over 100 columns. When using data from that table in use cases, only a relatively small number of columns are necessary. I don't want to load up the entire row in order to use only a subset of that.

Mapping several Java classes on the same database table using the same key would be great. The question is: Does Hibernate support that?

Colbert Philippe

yes, likely - it depends on possible strategies to be able to figure out which type a row is, the simplest strategy being a value in a specific column.
Look at http://docs.jboss.org/hibernate/core/3.6/reference/en-US/html_single/#d0e6906