[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1877) ClassNotFoundException on my entity-name in a join tag

[Guillaume Jeudy (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=31738#action_31738 ] 

Guillaume Jeudy commented on HHH-1877:
--------------------------------------

We are hitting the same issue but with a different usecase:

The mapping is stripped down for simplicity:

<class name="SpecificationImpl" table="SPECIFICATION" entity-name="SpecificationEagerLoad">
		<id name="id" column="SPECIFICATION_ID" type="long">
			<generator class="assigned" />
		</id>
		<discriminator column="TYPE_CD" />
	
		<subclass name="CoverageGroupImpl" entity-name="CoverageGroupEagerLoad" discriminator-value="CGS">
			<join table="COVERAGE_GROUP_SPECIFICATION">
				<key column="SPECIFICATION_ID" />
				 
				<property name="annualStatementLine" column="ANNUAL_STATEMENT_LINE_CD" /> 
			</join>
		</subclass>

Fails with:

Caused by: org.hibernate.MappingException: class CoverageGroupEagerLoad not found while looking for property: annualStatementLine
	at org.hibernate.mapping.SimpleValue.setTypeUsingReflection(SimpleValue.java:279)
	at org.hibernate.cfg.HbmBinder.createProperty(HbmBinder.java:2171)
	at org.hibernate.cfg.HbmBinder.bindJoin(HbmBinder.java:992)
	at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2104)
	at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2038)
	at org.hibernate.cfg.HbmBinder.bindSubclass(HbmBinder.java:820)
	at org.hibernate.cfg.HbmBinder.handleSubclass(HbmBinder.java:2217)
	at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2108)
	at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2038)
	at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:359)
	at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:273)
	at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:144)
	at org.hibernate.cfg.Configuration.add(Configuration.java:675)
	at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:510)
	at org.hibernate.cfg.Configuration.addJar(Configuration.java:624)
	... 51 more
Caused by: java.lang.ClassNotFoundException: CoverageGroupEagerLoad

Ive checked hibernate 3.3.1.GA and the bug is still there in HbmBinder.bindJoin() method.

Any plans that this be fixed in the next GA release? The fix appears trivial.

> ClassNotFoundException on my entity-name in a join tag
> ------------------------------------------------------
>
>                 Key: HHH-1877
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1877
>             Project: Hibernate Core
>          Issue Type: Bug
>    Affects Versions: 3.1.3
>         Environment: Hibernate 3.1.3, Spring 1.2.8, Oracle 9I, Windows XP (localhost)
>            Reporter: Christian Mineau
>         Attachments: HHH-1877.patch, testcase-HHH1877.ZIP
>
>
> I use the attribute "entity-name" in my class mapping, this is for mapping the same object many times on table(s), and all seem to work normally. I found a problem when I tried to join a table on another class mapping, like: 
>      <class entity-name="categoryDefault" name="ca.cie.pak.CategoryVO" table="CATEGORY">
> 		    <id name="id" column="CATEGORY_ID" type="java.lang.Integer">
>                 <generator class="native"/>
>             </id>
>             <property name="name" column="NAME"/>
>             
> 		 <bag name="contents" where="priority = 0"> 
> 		     <key column="CATEGORY_ID" />
> 		     <one-to-many entity-name="ContentSummary"/>
> 		 </bag>
> 		    
> 		 <join table="LAYOUT_CATEGORY">
> 		      <key foreign-key="CATEGORY_ID" column="CATEGORY_ID" />
> 	            <property  name="layoutId" column="LAYOUT_ID"/>
>             </join>  		    
> 		</class> 
> I found a ClassNotFoundException: categoryDefault. This exception is thrown when the HbmBinder.bindJoin method is called. I see the code and it tries to instantiate a class from the getEntityName and not by the className. 
> Someone can answer me if this is a XML mapping error or a real bug and what I need to do.

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