CriteriaQuery on mapped-superclass does not work with orm.xml

[Chris Hinshaw]

I have been switching code to use the orm.xml from the annotations for code 
cleanliness and better documentation. As I was doing this I broke the ability 
to query an MappedSuperClass. I know what this is not a jpa 2.0 specification 
but this functionality does work with openjpa.  I have tried the newest 2.2.1 
version and am still having the same problem. I did notice that in the orm.xsd 
for 2.0 mapped-superclass does not support the <inheritance> tag which may be 
causing my problem since I am unable to specify that the strategy will be 
TABLE_PER_CLASS and this may be a prerequisite? Any ideas?


The following are my base class and the class that extends AnalyticsOperation. 

        <mapped-superclass class="com.hp.vf.server.domain.AnalyticsOperation"
                access="FIELD">

                <attributes>
                        <basic name="isPublic" />
                        <basic name="name" />
                        <basic name="description" />

                        <one-to-many name="inputs"
                                
target-entity="com.hp.vf.server.domain.AnalyticsOperationInput"
                                fetch="LAZY" orphan-removal="true">
                                <order-column />
                                <cascade>
                                        <cascade-all />
                                </cascade>
                        </one-to-many>

                        <one-to-many name="outputs" 
target-entity="com.hp.vf.server.domain.metric.Metric"
                                fetch="LAZY" orphan-removal="true">
                                <order-column />
                                <cascade>
                                        <cascade-all />
                                </cascade>
                        </one-to-many>

                        <one-to-one name="owner" fetch="LAZY">
                                <cascade>
                                        <cascade-persist />
                                        <cascade-merge />
                                </cascade>
                        </one-to-one>
                </attributes>
        </mapped-superclass>

        <entity class="com.hp.vf.server.domain.RAnalyticsOperation"
                access="FIELD">
                <inheritance strategy="TABLE_PER_CLASS" />
                <attributes>
                        <basic name="code" fetch="LAZY">
                                <lob />
                        </basic>
                </attributes>
        </entity>



In this class the clazz is the AnalyticsOperation.class from above.
        
        EntityManager entityManager = 
ThreadLocalPersistenceManager.getEntityManager();
                CriteriaBuilder criteriaBuilder = 
entityManager.getCriteriaBuilder();
                CriteriaQuery<T> criteriaQuery = 
criteriaBuilder.createQuery(clazz);
                
                Root<T> root = criteriaQuery.from(clazz);

                List<Predicate>  conditions = new ArrayList<Predicate>();

                if(searchColumn != null && (searchText != null && 
searchText.trim().length() > 0 )){
                        conditions.add(criteriaBuilder.like(root.<String> 
get(searchColumn), "%" + searchText.trim() + "%"));
                }
        ...
        }


But when executing I get this exception. The DaoBase.java:141 is "Root<T> root 
= criteriaQuery.from(clazz);"

java.lang.IllegalArgumentException: "class 
com.hp.vf.server.domain.AnalyticsOperation" categorized as "MAPPED_SUPERCLASS" 
should be a "ENTITY"
        at 
org.apache.openjpa.persistence.meta.MetamodelImpl.instantiate(MetamodelImpl.java:243)
        at 
org.apache.openjpa.persistence.meta.MetamodelImpl.find(MetamodelImpl.java:224)
        at 
org.apache.openjpa.persistence.meta.MetamodelImpl.entity(MetamodelImpl.java:126)
        at 
org.apache.openjpa.persistence.criteria.CriteriaQueryImpl.from(CriteriaQueryImpl.java:345)
        at com.hp.vf.server.dao.DaoBase.search(DaoBase.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)


Thanks,
Chris