• Mapping a class several times

    Mapping a class several times Imagine that you have several tables with some columns in common. For example, you could have ITEM_AUCTION and ITEM_SALE tables. Usually you map each table to an entity persistent class, ItemAuction and ItemSale respectively. With the help of entity names, you can save work and implement a single persistent class. To map both tables to a single persistent class, use different entity names (and usually different property mappings): … entity-name=”ItemSale” table=”ITEM_SALE”> … The model.Item persistent class has all the properties you mapped: id, description, initialPrice, and salesPrice. Depending on the entity name you use at runtime, some properties are considered persistent and others transient: Item…