1 Reply Latest reply on Oct 1, 2002 10:23 AM by pol.leleux

    I think that there is a bug in CMR...

    pol.leleux Newbie

      Hello all,

      I have a table with 2 FK's (one is mandatory, the other is not, i.e. the first cannot be null while the second can).
      I created an entity bean with CMR relationships to the 2 foreign objects

      I wrote a finder which could look like this :

      @ejb:finder signature="java.util.Collection findByObj1AndObj2( Obj1 obj1, Obj2 obj2)"
      query="SELECT OBJECT(o) FROM Schema o WHERE o.obj1 = ?1 AND o.obj2 = ?2"

      the goal of that finder is to find all objects with given values for the foreign keys.

      While it works if I call it with something like this :

      findByObj1AndObj2( obj1, obj2 ) where obj1 != null && obj2 != null,

      it fails with the following exception if I use something like this :

      findByObj1AndObj2( obj1, null ) where obj1 != null

      which I would use to find all objects that have a relation with obj1 but no relation in the second foreign key

      =========================================================
      15:12:35,022 ERROR [STDERR] javax.ejb.FinderException: Find failed: java.lang.Nu
      llPointerException
      15:12:35,022 ERROR [STDERR] at org.jboss.ejb.plugins.cmp.jdbc.JDBCAbstractQu
      eryCommand.execute(JDBCAbstractQueryCommand.java:143)
      15:12:35,022 ERROR [STDERR] at org.jboss.ejb.plugins.cmp.jdbc.JDBCFindEntiti
      esCommand.execute(JDBCFindEntitiesCommand.java:40)
      15:12:35,022 ERROR [STDERR] at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManag
      er.findEntities(JDBCStoreManager.java:472)
      15:12:35,022 ERROR [STDERR] at org.jboss.ejb.plugins.CMPPersistenceManager.f
      indEntities(CMPPersistenceManager.java:348)
      15:12:35,052 ERROR [STDERR] at org.jboss.resource.connectionmanager.CachedCo
      nnectionInterceptor.findEntities(CachedConnectionInterceptor.java:323)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.EntityContainer.findLocal(Entit
      yContainer.java:610)
      15:12:35,052 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor217.invoke
      (Unknown Source)
      15:12:35,052 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invo
      ke(DelegatingMethodAccessorImpl.java:25)
      15:12:35,052 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:3
      24)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.EntityContainer$ContainerInterc
      eptor.invokeHome(EntityContainer.java:1116)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.plugins.AbstractInterceptor.inv
      okeHome(AbstractInterceptor.java:73)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.plugins.EntitySynchronizationIn
      terceptor.invokeHome(EntitySynchronizationInterceptor.java:257)
      15:12:35,052 ERROR [STDERR] at org.jboss.resource.connectionmanager.CachedCo
      nnectionInterceptor.invokeHome(CachedConnectionInterceptor.java:215)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.plugins.EntityInstanceIntercept
      or.invokeHome(EntityInstanceInterceptor.java:134)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.plugins.EntityLockInterceptor.i
      nvokeHome(EntityLockInterceptor.java:79)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.plugins.EntityCreationIntercept
      or.invokeHome(EntityCreationInterceptor.java:44)
      15:12:35,052 ERROR [STDERR] at org.jboss.ejb.plugins.AbstractTxInterceptor.i
      nvokeNext(AbstractTxInterceptor.java:98)
      15:12:35,062 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.runWit
      hTransactions(TxInterceptorCMT.java:167)
      15:12:35,062 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.invoke
      Home(TxInterceptorCMT.java:52)
      15:12:35,062 ERROR [STDERR] at org.jboss.ejb.plugins.SecurityInterceptor.inv
      okeHome(SecurityInterceptor.java:104)
      15:12:35,062 ERROR [STDERR] at org.jboss.ejb.plugins.LogInterceptor.invokeHo
      me(LogInterceptor.java:109)
      15:12:35,062 ERROR [STDERR] at org.jboss.ejb.EntityContainer.invokeHome(Enti
      tyContainer.java:487)
      15:12:35,062 ERROR [STDERR] at org.jboss.ejb.plugins.local.BaseLocalContaine
      rInvoker.invokeHome(BaseLocalContainerInvoker.java:227)
      15:12:35,062 ERROR [STDERR] at org.jboss.ejb.plugins.local.LocalHomeProxy.in
      voke(LocalHomeProxy.java:110)
      15:12:35,062 ERROR [STDERR] at $Proxy288.findByAppAndEntityPage(Unknown Sour
      ce)
      ==========================================================

      I think that it should work. Is there anyway to make it work ?

      To bypass the problem, I wrote a finder using the first foreign key only, then I filtrate the results by eliminating all the records which have the second foreign object not null which is far from being the nicest solution !

        • 1. Re: I think that there is a bug in CMR...
          pol.leleux Newbie

          Ok,

          I just found another solution with EJB-QL, I can also create another finder which would be like this :

          @ejb:finder signature="java.util.Collection findByObj1AndNullObj2( Obj1 obj1 )"
          query="SELECT OBJECT(o) FROM Schema o WHERE o.obj1 = ?1 AND o.obj2 IS NULL"

          and it works...

          but I still think that it should work with the first finder (providing 2 objects with the second set to null)