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.a...@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 > <maxtorz...@gmail.com> wrote: > > I'm doing build-time enhancement. > > > > Send your persistence.xml > > El 19/11/2012 09:50, "Chris Wolf" <cwolf.a...@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.bobl...@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.a...@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 > >> >> <maxtorz...@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" > >> >> <maxtorz...@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.a...@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 > >> >> >>> <maxtorz...@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.a...@gmail.com> escribió: > >> >> >>> > > >> >> >>> >> José, > >> >> >>> >> > >> >> >>> >> I tried List/ArrayList - same error. Thanks.... > >> >> >>> >> > >> >> >>> >> -Chris > >> >> >>> >> > >> >> >>> >> On Sun, Nov 18, 2012 at 9:47 PM, José Luis Cetina < > >> >> >>> maxtorz...@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.a...@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 < > >> >> >>> maxtorz...@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.a...@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.a...@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* > >> >> >>> >> >> > > >> >> >>> > >> >> > ------------------------------------------------------------------ > >> >> - > >> >> >>> >> >> > >> >> >>> >> > >> >> >>> > >> >> >> > >> >> > >> >
