Chapter 4 Generating Hibernate Persistent Objects and JSF Pages

Defining Hibernate Basic O/R Mapping

Each class has an XML file, <Class>.hbm.xml, which acts as its Hibernate O/R mapping file.

Classes can be mapped to tables or views. Since views have many constraints and limited functionality (for example they do not have primary keys and reference keys), some views cannot be updated, and the mappings may not work properly in some cases.

There are some conditions that need to be met in order to generate mapping for a specific class:

• The Java source can be generated. This may not be possible if, for example, the visibility of the class is private.
• The class is persistent.
• The generation mode is not set to Generate ADT (abstract data type).
• If the class is an inner class, it must be static, and have public visibility. Hibernate should then be able to create instances of the class.

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