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Hibernate creating entites not listed in persistence.xml  RSS feed

 
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Okay I am a beginner to Hibernate and JPA. I want to know what is the purpose of having a mapping in the persistence.xml like the following -:

<class>test.entity.Course</class>

When I run my project in Eclipse Hibernate creates the tables of the all the classes marked with @Entity annotation, regardless of the fact whether it is present in the persistence.xml file. So what was the use of the mapping in persistence.xml ? How can i stop Hibernate or JPA to map objects that I don't want other than deleting them from the project all together.
 
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