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POwhy does Hibernate's EntityManager.find() impl throw EntityNotFoundException?
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  1. POwhy does Hibernate's EntityManager.find() impl throw EntityNotFoundException?
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    copied!<p>JPA 2.0 <a href="http://docs.oracle.com/javaee/6/api/javax/persistence/EntityManager.html#find%28java.lang.Class,%20java.lang.Object%29" rel="nofollow">javadoc</a> (and probably the spec) say that EntityManager.find() returns null when entity isn't found:</p> <blockquote> <p>the found entity instance or null if the entity does not exist</p> </blockquote> <p>Yet Hibernate's impl throws EntityNotFoundException instead. Why? Observed using Hibernate 3.6.8 and <a href="http://search.maven.org/#artifactdetails%7Corg.hibernate.javax.persistence%7Chibernate-jpa-2.0-api%7C1.0.1.Final%7Cjar" rel="nofollow">hibernate-jpa-2.0-api v1.0.1.Final</a></p> <blockquote> <p>javax.persistence.EntityNotFoundException: Unable to find bar.foo.Entity with id 144487 at org.hibernate.ejb.Ejb3Configuration$Ejb3EntityNotFoundDelegate.handleEntityNotFound(Ejb3Configuration.java:137) at org.hibernate.event.def.DefaultLoadEventListener.returnNarrowedProxy(DefaultLoadEventListener.java:320) at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:277) at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152) at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1090) at org.hibernate.impl.SessionImpl.get(SessionImpl.java:1005) at org.hibernate.impl.SessionImpl.get(SessionImpl.java:998) at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:779) at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:754)</p> </blockquote>
 

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