[hibernate-issues] [Hibernate-JIRA] Created: (HSEARCH-48) NullPointerException when Query.list()

[Eddie Man (JIRA)]

NullPointerException when Query.list()
--------------------------------------

                 Key: HSEARCH-48
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-48
             Project: Hibernate Search
          Issue Type: Bug
          Components: query
         Environment: Linux, Oracle/MySQL
            Reporter: Eddie Man
            Priority: Critical
         Attachments: screenshot21.png

Suppose I have the following mapping:

ClassA
=======
<class name="ClassA" table="TableA" lazy="false">
	<id name="ID" column="ID" type="integer" unsaved-value="0">
		<generator class="native">
		</generator>
	</id>
	<one-to-one name="classB" class="ClassB" cascade="save-update,lock" property-ref="classA" lazy="no-proxy" access="field"/>
</class>

ClassB
=======
<class name="ClassB" table="TableB" lazy="false">
	<composite-id>
		<key-property name="ID" column="ID" type="integer"/>
		<key-many-to-one name="classA" column="ClassAID" class="ClassA">
		</key-many-to-one>
	</composite-id>
</class>

Pre-condition :
TableA
+----+
| ID |
+----+
|  1 |
+----+

TableB
+----+----------+
| ID | ClassAID |
+----+----------+
|  1 |        1 |
+----+----------+



When I use Session.createQuery("From ClassA as ClassA").list(), it throw the following exception:

java.lang.NullPointerException
	at org.hibernate.persister.entity.AbstractEntityPersister.loadByUniqueKey(AbstractEntityPersister.java:1641)
	at org.hibernate.type.EntityType.loadByUniqueKey(EntityType.java:608)
	at org.hibernate.type.EntityType.resolve(EntityType.java:382)
	at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:116)
	at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
	at org.hibernate.loader.Loader.doQuery(Loader.java:717)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
	at org.hibernate.loader.Loader.doList(Loader.java:2211)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
	at org.hibernate.loader.Loader.list(Loader.java:2090)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
	at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
	at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1123)
	at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)

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