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From Chris Wolf <cwolf.a...@gmail.com>
Subject Re: 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 15:50:19 GMT
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/manual/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</includes>
>> >>
>> >> 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(AbstractEntityMa
>> >>> 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.class
>> >>> (The
>> >>> >> >> >> filename, directory name, or volume label
syntax
>> is incorrect)
>> >>> >> >> >>         at
>> >>> >> >> >>
>> >>> >> >>
>> >>> >>
>> >>>
>> org.apache.openjpa.lib.conf.Configurations.launchRunnable(Configurat
>> >>> 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#StaticLoggerBinderfor
>> >>> >> >> >> > 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.html
>> >>> >> >> >> >
>> >>> >> >> >> > 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-EntityMan
>> >>> 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#ref_
>> >>> 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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