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From Boblitz John <John.Bobl...@BERTSCHI.com>
Subject AW: cannot persist m2m data, getting "ArgumentException: Attempt to cast instance xxx [java.util.HashSet]" to PersistenceCapable failed. Ensure that it has been enhanced."
Date Mon, 19 Nov 2012 16:46:30 GMT
Oh, sorry - A line got dropped ...

I meant to say that I do NOT have  

<mapping-file>META-INF/orm.xml</mapping-file>
<property name="openjpa.RuntimeUnenhancedClasses" value="supported"/> 
<property name="openjpa.MetaDataFactory" value="jpa(Types=java.util.ArrayList)"/>

in my persistence.xml ...



> -----Ursprüngliche Nachricht-----
> Von: Chris Wolf [mailto:cwolf.algo@gmail.com] 
> Gesendet: Montag, 19. November 2012 17:44
> An: users@openjpa.apache.org
> Betreff: Re: cannot persist m2m data, getting 
> "ArgumentException: Attempt to cast instance xxx 
> [java.util.HashSet]" to PersistenceCapable failed. Ensure 
> that it has been enhanced."
> 
> So you have <mapping-file>META-INF/orm.xml</mapping-file> in 
> your persistence.xml, but the file "orm.xml" actually does not exist?
> 
> Unless you were just quoting a piece of the persistence.xml I sent?
> 
> Also do you have your entities declared via <class></class> 
> in your persistence.xml?
> 
> Thanks,
> 
>     -Chris
> 
> On Mon, Nov 19, 2012 at 11:06 AM, Boblitz John 
> <John.Boblitz@bertschi.com> wrote:
> > FYI.
> >
> > My persitence xml is essentially the same as yours.
> >
> > <mapping-file>META-INF/orm.xml</mapping-file>
> > <property name="openjpa.RuntimeUnenhancedClasses" 
> value="supported"/> 
> > <property name="openjpa.MetaDataFactory" 
> > value="jpa(Types=java.util.ArrayList)"/>
> >
> > Nor do I have an ORM.XML.
> >
> > I also do build time enhancement via ANT.
> >
> > John
> >
> >> -----Ursprüngliche Nachricht-----
> >> Von: Chris Wolf [mailto:cwolf.algo@gmail.com]
> >> Gesendet: Montag, 19. November 2012 17:02
> >> An: users@openjpa.apache.org
> >> Betreff: Re: cannot persist m2m data, getting
> >> "ArgumentException: Attempt to cast instance xxx 
> [java.util.HashSet]" 
> >> to PersistenceCapable failed. Ensure that it has been enhanced."
> >>
> >> Thanks José, see my reply to Rick - it has my persistence.xml and 
> >> orm.xml attached...
> >>
> >>    -Chris
> >>
> >> On Mon, Nov 19, 2012 at 10:57 AM, José Luis Cetina 
> >> <maxtorzito@gmail.com> wrote:
> >> > I'm doing build-time enhancement.
> >> >
> >> > Send your persistence.xml
> >> > El 19/11/2012 09:50, "Chris Wolf" <cwolf.algo@gmail.com> 
> escribió:
> >> >
> >> >> I choose property access over field access due to the
> >> caveats listed
> >> >> at the bottom of this page:
> >> >>
> >> >>
> >> >>
> >> 
> http://openjpa.apache.org/builds/1.0.4/apache-openjpa-1.0.4/docs/manu
> >> >> al/ref_guide_pc_enhance.html
> >> >>
> >> >> ...not that is matters, really, since my entities *are* 
> enhanced 
> >> >> (just not java.util.ArrayList).
> >> >>
> >> >> I would be curious to see your persistence.xml and orm.xml
> >> and if you
> >> >> are doing runtime enhancement or build-time enhancement....
> >> >>
> >> >> Thanks,
> >> >>
> >> >>     -Chris
> >> >>
> >> >> On Mon, Nov 19, 2012 at 10:37 AM, Boblitz John 
> >> >> <John.Boblitz@bertschi.com> wrote:
> >> >> > Actually, mine works just fine!
> >> >> >
> >> >> > I choose to annotate the attributes instead of the 
> methodes, but 
> >> >> > here is
> >> >> an example:
> >> >> >
> >> >> > @Entity
> >> >> > @Table(name = "UserGroup")
> >> >> > public class UserGroup extends BaseEntity {
> >> >> >
> >> >> > [snip]
> >> >> >
> >> >> >         @ManyToMany(mappedBy = "userGroups")
> >> >> >         private Set<Users> users;
> >> >> >
> >> >> > }
> >> >> >
> >> >> > @Entity
> >> >> > @Table(name = "Users")
> >> >> > public class Users extends BaseEntity {
> >> >> >
> >> >> > [snip]
> >> >> >
> >> >> >         @ManyToMany
> >> >> >         @JoinTable(name = "UserGroupMember", joinColumns =
> >> >> @JoinColumn(name = "userid"), inverseJoinColumns =
> >> @JoinColumn(name =
> >> >> "groupid"))
> >> >> >         private Set<UserGroup> userGroups;
> >> >> >
> >> >> > }
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >> -----Ursprüngliche Nachricht-----
> >> >> >> Von: Chris Wolf [mailto:cwolf.algo@gmail.com]
> >> >> >> Gesendet: Montag, 19. November 2012 16:29
> >> >> >> An: users@openjpa.apache.org
> >> >> >> Betreff: Re: cannot persist m2m data, getting
> >> >> >> "ArgumentException: Attempt to cast instance xxx 
> >> >> >> [java.util.HashSet]" to PersistenceCapable failed.
> >> Ensure that it
> >> >> >> has been enhanced."
> >> >> >>
> >> >> >> José,
> >> >> >>
> >> >> >> The plugin doc says you can have a comma-delimited list of

> >> >> >> classes, however, since enhancement on collection
> >> classes doesn't
> >> >> >> seem to work anyway - per your suggestion, I removed 
> >> >> >> "java.util.ArrayList" and re-ran the "mvn
> >> openjpa:enhance" command.
> >> >> >>
> >> >> >> The result, as ever, is still:
> >> >> >>
> >> >> >> 771  openjpa  INFO   [main] openjpa.Enhance - Creating
> >> subclass and
> >> >> >> redefining methods for
> >> >> >> "[class java.util.ArrayList]". This means that your 
> application 
> >> >> >> will be less efficient than it would if you ran the OpenJPA

> >> >> >> enhancer.
> >> >> >> Exception in thread "main" 
> <openjpa-2.2.0-r422266:1244990 fatal 
> >> >> >> user error>
> >> >> >> org.apache.openjpa.persistence.ArgumentException: No 
> registered 
> >> >> >> metadata for type  "class java.util.ArrayList".
> >> >> >> This can happen if this class has not been annotated as a

> >> >> >> persistent entity or specified in the persistence unit (ex:
> >> >> >> in the orm.xml).
> >> >> >>
> >> >> >> I wonder if anyone knows of a working example of
> >> many-to-many ORM
> >> >> >> using OpenJPA?
> >> >> >>
> >> >> >> Thanks,
> >> >> >>
> >> >> >>    -Chris
> >> >> >>
> >> >> >>
> >> >> >> On Mon, Nov 19, 2012 at 10:19 AM, José Luis Cetina 
> >> >> >> <maxtorzito@gmail.com> wrote:
> >> >> >> > And I think you don't have to set arraylist class or
any
> >> >> >> java "native"
> >> >> >> > class as enhance class. Only your entities have to be
> >> enhancement.
> >> >> >> > El 19/11/2012 09:12, "José Luis Cetina"
> >> >> >> <maxtorzito@gmail.com> escribió:
> >> >> >> >
> >> >> >> >> I'm not sure if the include tag accept more than
1 class.
> >> >> >> >>
> >> >> >> >> You have:
> >> >> >> >>
> >> <includes>**/entities/*.class,java.util.ArrayList.class</includ
> >> >> >> >> es>
> >> >> >> >>
> >> >> >> >> Try to remove java.util.ArrayList.
> >> >> >> >> El 19/11/2012 09:05, "Chris Wolf"
> >> <cwolf.algo@gmail.com> escribió:
> >> >> >> >>
> >> >> >> >>> José,
> >> >> >> >>>
> >> >> >> >>> Thanks - I sent the two entities to John (this
list).
> >> >> >> The pom.xml
> >> >> >> >>> is attached...
> >> >> >> >>>
> >> >> >> >>>     -Chris
> >> >> >> >>>
> >> >> >> >>>
> >> >> >> >>>
> >> >> >> >>> On Mon, Nov 19, 2012 at 9:54 AM, José Luis Cetina

> >> >> >> >>> <maxtorzito@gmail.com>
> >> >> >> >>> wrote:
> >> >> >> >>> > Please send your 2 entities and your pom
> >> configuration whit
> >> >> >> >>> > the enhance plugin.
> >> >> >> >>> > El 19/11/2012 08:46, "Chris Wolf"
> >> >> >> <cwolf.algo@gmail.com> escribió:
> >> >> >> >>> >
> >> >> >> >>> >> José,
> >> >> >> >>> >>
> >> >> >> >>> >> I tried List/ArrayList - same error.
 Thanks....
> >> >> >> >>> >>
> >> >> >> >>> >>    -Chris
> >> >> >> >>> >>
> >> >> >> >>> >> On Sun, Nov 18, 2012 at 9:47 PM, José
Luis Cetina <
> >> >> >> >>> maxtorzito@gmail.com>
> >> >> >> >>> >> wrote:
> >> >> >> >>> >> > Of course I'm using 1-M relationships
but I use them
> >> >> >> with List
> >> >> >> >>> >> > not
> >> >> >> >>> >> hashset,
> >> >> >> >>> >> > why you dont give a try to list
only for look if the
> >> >> >> problem is
> >> >> >> >>> >> > with hashset.
> >> >> >> >>> >> > El 18/11/2012 19:59, "Chris Wolf"
> >> >> >> <cwolf.algo@gmail.com> escribió:
> >> >> >> >>> >> >
> >> >> >> >>> >> >> José,
> >> >> >> >>> >> >>
> >> >> >> >>> >> >> Thanks for your reply.  My
pom.xml setup is
> >> very similar
> >> >> >> >>> >> >> to yours
> >> >> >> >>> and
> >> >> >> >>> >> >> the "enhance" goal  runs without
error, but, as I 
> >> >> >> >>> >> >> mentioned, I still get the
error on "casting
> >> >> >> java.util.HashSet".   Are you able
> >> >> >> >>> >> >> to persist entities with 1-M
or M-M relationships?
> >> >> >> >>> >> >>
> >> >> >> >>> >> >> BTW, I changed my code to temporarily
change JPA
> >> >> >> provider from
> >> >> >> >>> OpenJPA
> >> >> >> >>> >> >> to the Hibernate JPA provider
and, once again, 
> >> >> >> >>> >> >> Hibernate's JPA reports:
> >> >> >> >>> >> >>
> >> >> >> >>> >> >> Exception in thread "main"
> >> >> >> java.lang.IllegalArgumentException:
> >> >> >> >>> Unknown
> >> >> >> >>> >> >> entity: java.util.HashSet
> >> >> >> >>> >> >>         at
> >> >> >> >>> >> >>
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntity
> >> >> >> Ma
> >> >> >> >>> nagerImpl.java:671)
> >> >> >> >>> >> >>
> >> >> >> >>> >> >> Well, at least both JPA implementations
are
> >> >> >> complaining about
> >> >> >> >>> >> >> the
> >> >> >> >>> same
> >> >> >> >>> >> >> issue - I just wish I knew
> >> >> >> >>> >> >> what I was doing!   I know
I can get this to work
> >> >> >> in an instant by
> >> >> >> >>> >> >> reverting to Hibernate-only
solution, but I
> >> was hoping
> >> >> >> >>> >> >> the byte-code weaving of
> >> >> >> JPA would
> >> >> >> >>> >> >> be a performance advantage
over Hibernate's
> >> >> >> reflection/proxy
> >> >> >> >>> >> >> pattern.
> >> >> >> >>> >> >>
> >> >> >> >>> >> >> Thanks again,
> >> >> >> >>> >> >>
> >> >> >> >>> >> >>     -Chris
> >> >> >> >>> >> >>
> >> >> >> >>> >> >> On Sun, Nov 18, 2012 at 1:26
PM, José Luis Cetina <
> >> >> >> >>> maxtorzito@gmail.com
> >> >> >> >>> >> >
> >> >> >> >>> >> >> wrote:
> >> >> >> >>> >> >> > I have this in my pom.xml
for ENHANCMENT 
> and works:
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > <!--OPENJPA ENHANCMENT-->
> >> >> >> >>> >> >> >             <plugin>
> >> >> >> >>> >> >> >
> >> <groupId>org.apache.openjpa</groupId>
> >> >> >> >>> >> >> >
> >> >> >> <artifactId>openjpa-maven-plugin</artifactId>
> >> >> >> >>> >> >> >                 <version>2.2.0</version>
> >> >> >> >>> >> >> >                 <configuration>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > <includes>mypackage/model/*.class</includes>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> <addDefaultConstructor>true</addDefaultConstructor>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >
> >> >> >> <enforcePropertyRestrictions>true</enforcePropertyRestrictio
> >> >> >> >>> >> >> > ns>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >
> >> >> >>
> >> <connectionDriverName>com.mysql.jdbc.Driver</connectionDriverName>
> >> >> >> >>> >> >> >                     <connectionProperties>
> >> >> >> >>> >> >> >
> >> >> >> driverClass=${database.driver.name},
> >> >> >> >>> >> >> >
> >> >> >> jdbcUrl=${database.connection.url},
> >> >> >> >>> >> >> >                      
  user=${database.user},
> >> >> >> >>> >> >> >
> >> password=${database.password},
> >> >> >> >>> >> >> >                      
  minPoolSize=5,
> >> >> >> >>> >> >> >                      
  acquireRetryAttempts=3,
> >> >> >> >>> >> >> >                      
  maxPoolSize=20
> >> >> >> >>> >> >> >                     </connectionProperties>
> >> >> >> >>> >> >> >                 </configuration>
> >> >> >> >>> >> >> >                 <executions>
> >> >> >> >>> >> >> >                     <execution>
> >> >> >> >>> >> >> >                      
  <id>enhancer</id>
> >> >> >> >>> >> >> >
> >> <phase>process-classes</phase>
> >> >> >> >>> >> >> >                      
  <goals>
> >> >> >> >>> >> >> >                      
      <goal>enhance</goal>
> >> >> >> >>> >> >> >                      
  </goals>
> >> >> >> >>> >> >> >                     </execution>
> >> >> >> >>> >> >> >                 </executions>
> >> >> >> >>> >> >> >                 <dependencies>
> >> >> >> >>> >> >> >                     <dependency>
> >> >> >> >>> >> >> >
> >> >> >> <groupId>org.apache.openjpa</groupId>
> >> >> >> >>> >> >> >
> >> <artifactId>openjpa</artifactId>
> >> >> >> >>> >> >> >                      
  <version>2.2.0</version>
> >> >> >> >>> >> >> >                     </dependency>
> >> >> >> >>> >> >> >                 </dependencies>
> >> >> >> >>> >> >> >             </plugin>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > In my persistence.xml
i have:
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >      <property name="openjpa.ConnectionUserName"
> >> >> >> >>> >> value="${db.username}"/>
> >> >> >> >>> >> >> >       <property name="openjpa.ConnectionPassword"
> >> >> >> >>> >> >> value="${db.password}"/>
> >> >> >> >>> >> >> >       <property name="openjpa.ConnectionURL"
> >> >> >> value="${db.url}"/>
> >> >> >> >>> >> >> >       <property 
> name="openjpa.ConnectionDriverName"
> >> >> >> >>> >> >> > value="${db.driver.class}"/>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > You can replace the database
properties in
> >> >> >> persistence.xml
> >> >> >> >>> >> >> > with
> >> >> >> >>> your
> >> >> >> >>> >> own
> >> >> >> >>> >> >> > values
> >> >> >> >>>
> >> (${db.username},${db.password},${db.url},${db.driver.class}).
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > I use this configuration
for my JEE Projects.
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > Maybe this can help you.
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > Regards.
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > SCJA. JL Cetina
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > 2012/11/18 Chris Wolf
<cwolf.algo@gmail.com>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >> I wrote a shell script
to directly invoke
> >> PCEnhancer
> >> >> >> >>> >> >> >> on class java.util.HashSet,
and even that
> >> didn't work:
> >> >> >> >>> >> >> >>
> >> >> >> >>> >> >> >> $ ./enhance.sh
> >> >> >> >>> >> >> >> 52  openjpa  INFO
  [main] openjpa.Tool -
> >> >> >> Enhancer running on
> >> >> >> >>> type
> >> >> >> >>> >> >> >> "java.util.HashSet".
> >> >> >> >>> >> >> >> Exception in thread
"main"
> >> java.lang.RuntimeException:
> >> >> >> >>> >> >> >> java.io.FileNotFoundExcep
> >> >> >> >>> >> >> >> tion:
> >> >> >> >>> >> >> >>
> >> file:\C:\opt\jdk\jre\lib\rt.jar!\java\util\HashSet.cl
> >> >> >> >>> >> >> >> ass
> >> >> >> >>> (The
> >> >> >> >>> >> >> >> filename, directory
name, or volume label syntax
> >> >> >> is incorrect)
> >> >> >> >>> >> >> >>         at
> >> >> >> >>> >> >> >>
> >> >> >> >>> >> >>
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> org.apache.openjpa.lib.conf.Configurations.launchRunnable(Configur
> >> >> >> at
> >> >> >> >>> ions.java:744)
> >> >> >> >>> >> >> >>
> >> >> >> >>> >> >> >> On Sun, Nov 18, 2012
at 10:37 AM, Chris Wolf <
> >> >> >> >>> cwolf.algo@gmail.com>
> >> >> >> >>> >> >> wrote:
> >> >> >> >>> >> >> >> > Hello,
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > This is my first
posting and first
> >> attempt to use
> >> >> >> >>> >> >> >> > OpenJPA.  I
> >> >> >> >>> put
> >> >> >> >>> >> >> >> > together a quick
demo and can persist
> >> individual,
> >> >> >> >>> >> >> >> > unrelated entities.
 However, when I try
> >> to persist
> >> >> >> >>> >> >> >> > related entities
to two tables via a
> >> link table, i.e.
> >> >> >> >>> many-2-many,
> >> >> >> >>> >> >> >> > it keeps complaining
about "casting to 
> >> >> >> >>> >> >> >> > PersistenceCapable",
in particular the class
> >> >> >> "java.util.HashSet".
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > First, I am using
the Eclipse JPA plugin
> >> >> >> (called "Dali"
> >> >> >> >>> >> >> >> > or "EclipseLink").
 Of course, I have OpenJPA
> >> >> >> configured
> >> >> >> >>> >> >> >> > as my JPA provider,
I am in a plain Java SE
> >> >> >> environment
> >> >> >> >>> >> >> >> > with LOCAL_RESOURCE
via JDBC connection
> >> >> >> properties in the
> >> >> >> >>> >> >> >> > persistence.xml.
 I am using Sun/Oracle 64bit
> >> >> >> >>> >> >> >> > JDK-1.6 and OpenJPA-2.2.0.
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > I am using the
Eclipse JPA plugin to generate
> >> >> >> the entity
> >> >> >> >>> classes
> >> >> >> >>> >> from
> >> >> >> >>> >> >> >> > already-exiting
database schema objects,
> >> and that
> >> >> >> >>> >> >> >> > code looks like
(just pasting the 
> relationship 
> >> >> >> >>> >> >> >> > code),
> >> >> >> >>> this
> >> >> >> >>> >> >> >> > action also adds
these classes to
> >> persistence.xml
> >> >> >> >>> >> >> >> > via persistence-unit/class
elements.
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > First M2M entity,
"MarketData":
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> >         //bi-directional
many-to-many
> >> >> >> association to RiskFactor
> >> >> >> >>> >> >> >> >         @ManyToMany(mappedBy="marketData")
> >> >> >> >>> >> >> >> >         public
Set<RiskFactor> 
> getRiskFactors() {
> >> >> >> >>> >> >> >> >             
   return this.riskFactors;
> >> >> >> >>> >> >> >> >         }
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Second M2M entity
"RiskFactor":
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> >         //bi-directional
many-to-many
> >> >> >> association to MarketData
> >> >> >> >>> >> >> >> >     @ManyToMany
> >> >> >> >>> >> >> >> >         @JoinTable(
> >> >> >> >>> >> >> >> >             
   
> name="MARKET_DATA__RISK_FACTOR"
> >> >> >> >>> >> >> >> >             
   , joinColumns={
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > @JoinColumn(name="RISK_FACTOR_ID",
> >> >> >> >>> >> >> >> nullable=false)
> >> >> >> >>> >> >> >> >             
           }
> >> >> >> >>> >> >> >> >             
   , inverseJoinColumns={
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > @JoinColumn(name="MARKET_DATA_ID",
> >> >> >> >>> >> >> >> nullable=false)
> >> >> >> >>> >> >> >> >             
           }
> >> >> >> >>> >> >> >> >             
   )
> >> >> >> >>> >> >> >> >         public
Set<MarketData> 
> getMarketData() {
> >> >> >> >>> >> >> >> >             
   return this.marketData;
> >> >> >> >>> >> >> >> >         }
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > When I run the
code, the log 
> indicates implicit 
> >> >> >> >>> >> >> >> > runtime
> >> >> >> >>> enhacement,
> >> >> >> >>> >> >> >> > yet it is complaining:
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > 
> "[persistdemo.ojpa.entities.RiskFactor@61578aab]
> >> >> >> >>> >> [java.util.HashSet]"
> >> >> >> >>> >> >> >> > to PersistenceCapable
failed.  Ensure
> >> that it has
> >> >> >> >>> >> >> >> > been
> >> >> >> >>> enhanced."
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > ...when it says,
"Ensure that it has been 
> >> >> >> >>> >> >> >> > enhanced." -
which is
> >> >> >> >>> >> "it"
> >> >> >> >>> >> >> >> > referring to?
 The entity "RiskFactor"
> >> or the field
> >> >> >> >>> relationship
> >> >> >> >>> >> >> >> > field's class,
"java.util.HashSet"?
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > 186  openjpa
 INFO   [main]
> >> openjpa.Runtime - OpenJPA
> >> >> >> >>> dynamically
> >> >> >> >>> >> >> >> > loaded the class
enhancer. Any 
> classes that were 
> >> >> >> >>> >> >> >> > not enhanced
> >> >> >> >>> at
> >> >> >> >>> >> build
> >> >> >> >>> >> >> >> > time will be
enhanced when they are
> >> loaded by the JVM.
> >> >> >> >>> >> >> >> > SLF4J: Failed
to load class
> >> >> >> >>> "org.slf4j.impl.StaticLoggerBinder".
> >> >> >> >>> >> >> >> > SLF4J: Defaulting
to no-operation 
> (NOP) logger 
> >> >> >> >>> >> >> >> > implementation
> >> >> >> >>> >> >> >> > SLF4J: See
> >> >> >> >>> >> >> >> >
> >> http://www.slf4j.org/codes.html#StaticLoggerBinderf
> >> >> >> >>> >> >> >> > or
> >> >> >> >>> >> >> >> > further details.
> >> >> >> >>> >> >> >> > 243  openjpa
 INFO   [main]
> >> openjpa.Runtime - OpenJPA
> >> >> >> >>> dynamically
> >> >> >> >>> >> >> >> > loaded a validation
provider.
> >> >> >> >>> >> >> >> > 596  openjpa
 INFO   [main] openjpa.Runtime -
> >> >> >> Starting OpenJPA
> >> >> >> >>> >> 2.2.0
> >> >> >> >>> >> >> >> > 630  openjpa
 INFO   [main]
> >> openjpa.jdbc.JDBC - Using
> >> >> >> >>> dictionary
> >> >> >> >>> >> class
> >> >> >> >>> >> >> >> > 
> "org.apache.openjpa.jdbc.sql.OracleDictionary".
> >> >> >> >>> >> >> >> > Exception in
thread "main"
> >> >> >> <openjpa-2.2.0-r422266:1244990
> >> >> >> >>> nonfatal
> >> >> >> >>> >> >> >> > user error>
> >> >> >> org.apache.openjpa.persistence.ArgumentException:
> >> >> >> >>> >> Attempt
> >> >> >> >>> >> >> >> > to cast instance
> >> >> >> >>> "[persistdemo.ojpa.entities.RiskFactor@61578aab]
> >> >> >> >>> >> >> >> > [java.util.HashSet]"
to
> >> PersistenceCapable failed.
> >> >> >> >>> >> >> >> > Ensure
> >> >> >> >>> that it
> >> >> >> >>> >> has
> >> >> >> >>> >> >> >> > been enhanced.
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Maybe because
"java.util.HashSet" was loaded
> >> >> >> before the
> >> >> >> >>> >> >> >> > dynamic enhancer
could get to it?
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Next, I tried
performing build-time
> >> enhancement via
> >> >> >> >>> >> >> >> > Maven, per
> >> >> >> >>> this
> >> >> >> >>> >> >> doc:
> >> >> >> >>> >> >> >> >
> >> http://openjpa.apache.org/enhancement-with-maven.ht
> >> >> >> >>> >> >> >> > ml
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > When I ran "mvn
openjpa:enhance", it
> >> finished with
> >> >> >> >>> >> >> >> > success, but
> >> >> >> >>> >> none
> >> >> >> >>> >> >> >> > of the classes
in target/classes seemed
> >> to have be
> >> >> >> >>> >> >> >> > changed (last-modified
date same as
> >> >> >> compile-time).  and
> >> >> >> >>> >> >> >> > re-running
> >> >> >> >>> results
> >> >> >> >>> >> in
> >> >> >> >>> >> >> >> > the same error
and stack-trace.
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > My openjpa:enhance
configuration was:
> >> >> >> >>> >> >> >> > <configuration>
> >> >> >> >>> >> >> >> >
> >> >> >> <includes>**/entities/*.class,java.util.HashSet</includes>
> >> >> >> >>> >> >> >> >
> >> >> >> <addDefaultConstructor>true</addDefaultConstructor>
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >>
> >> >> >> 
> <enforcePropertyRestrictions>true</enforcePropertyRestrictions>
> >> >> >> >>> >> >> >> > </configuration>
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Next, I tried
invoking with:
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> >
> >> >> >> -javaagent:/opt/apache-openjpa-2.2.0/openjpa-all-2.2.0.ja
> >> >> >> >>> >> >> >> > r
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Same error -
same stack trace.
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Then, I tried
setting this property:
> >> >> >> >>> >> >> >> > openjpa.RuntimeUnenhancedClasses=supported
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Same error -
same stack trace.
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Then, following
a suggestion I found here:
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >>
> >> >> >> >>> >> >>
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> http://openjpa.208410.n2.nabble.com/JPA-adding-entities-to-EntityM
> >> >> >> an
> >> >> >> >>> agerFactory-programmatically-td210697.html
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > I tried setting
both:
> >> >> >> >>> >> >> >> > openjpa.RuntimeUnenhancedClasses=supported
> >> >> >> >>> >> >> >> >
> >> openjpa.MetaDataFactory=jpa(Types=java.util.HashSet
> >> >> >> >>> >> >> >> > )
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > BTW, this is
a dead link "User's Guide on 
> >> >> >> >>> >> >> >> > Enhancement"
/
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >>
> >> >> >> >>> >> >>
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> http://openjpa.apache.org/builds/latest/docs/manual/manual.html#re
> >> >> >> f_
> >> >> >> >>> guide_pc_enhance
> >> >> >> >>> >> >> >> > (from page:
> >> >> >> >>> >> >> >> >
> >> http://openjpa.apache.org/entity-enhancement.html)
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > So is there any
way to use OpenJPA to persist 
> >> >> >> >>> >> >> >> > objects related
> >> >> >> >>> via a
> >> >> >> >>> >> >> >> > link table? 
(there obviously must be, but
> >> >> >> it's a total
> >> >> >> >>> >> >> >> > mystery to me)
 I can't believe it's this
> >> >> >> >>> >> difficult,
> >> >> >> >>> >> >> >> > I must be doing
something really dumb.
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > Regards,
> >> >> >> >>> >> >> >> >
> >> >> >> >>> >> >> >> > CW
> >> >> >> >>> >> >> >>
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> >
> >> >> >> >>> >> >> > --
> >> >> >> >>> >> >> >
> >> >> >> >>>
> >> >> >>
> >> ------------------------------------------------------------------
> >> >> >> -
> >> >> >> >>> >> >> > *SCJA. José Luis Cetina*
> >> >> >> >>> >> >> >
> >> >> >> >>>
> >> >> >>
> >> ------------------------------------------------------------------
> >> >> >> -
> >> >> >> >>> >> >>
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >> >>
> >> >> >>
> >> >>
> >>
> 
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