Hi,
I use JBoss 5.1 that uses Hibernate core 3.3.1 and EntityManager 3.4.0.

I tried to use proguard to obfuscate entity class names. For example,

@Entity(name="Foo")
class Foo --> f

@Entity(name="Bar")
class Bar --> g

NamedQuery:
select a from Foo a, Bar b where ....

org.hibernate.hql.ast.QuerySyntaxException: ??? is not mapped.
From debug, the query string is correctly passed to Hibernate. where the three question marks come from? Thanks for help.

at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:181)
at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:110)
at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:93)
at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:277)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3056)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:2945)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:688)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:544)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229)
at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:251)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183)
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:134)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:94)
at org.hibernate.impl.SessionFactoryImpl.checkNamedQueries(SessionFactoryImpl.java:436)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:384)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1327)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)

I tried the following again:

package mypackage;

@Entity(name="Student")
@Table(name="Student")
class Student {
age,
name
}

HQL:
select distinct c from Student c where c.age>=20 order by c.name desc

It works fine.

After obfuscation, the Student class name becomes a;
(From the following error message). The entity name and table name is not changed.

Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.ast.QuerySyntaxException: ??? is not mapped [select distinct c from mypackage.a c where c.age>=20 order by c.name desc]

The mesage should let me know which is not mapped, but it shows question marks.

DetachedCriteria works fine before and after obfuscation.

Thanks for help. any ideas are appreciated.

Dave