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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 15:37:56 GMT
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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