I have a requirement to have an abstract superclass.

I have 6 subclasses for that abstract superclass.

I mapped them with the SINGLE_TABLE inheritance strategy in JPA.

In another POJO I have a one to many relationship with these 1+6 classes.

@OneToMany(mappedBy = "mSearchPreference", cascade = CascadeType.ALL)
private Set<SearchCriteria> mSearchCriteria;

here "SearchCriteria" is the abstract class. 

@Entity
@Table(name = "SRCH_CRTR_T", schema = "LPEW")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "SRCH_DISCRIMINATOR_CDE", discriminatorType = DiscriminatorType.STRING)
@org.hibernate.annotations.ForceDiscriminator
public abstract class SearchCriteria extends BaseDBObject implements Comparable<SearchCriteria>

and it has 6 concrete subclasses classes like 

@Entity
@DiscriminatorValue("DATE")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
public class SearchCriteriaDateRange extends SearchCriteria

I can insert the values into the table, but when I am retrieving I get an error:

Caused by: org.hibernate.WrongClassException: Object with id: 261 was not of the specified subclass: com.lmig.lit.lpew.model.criteria.SearchCriteria (Discriminator: DATE  )
    at org.hibernate.loader.Loader.getInstanceClass(Loader.java:1453)
    at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1284)
    at org.hibernate.loader.Loader.getRow(Loader.java:1206)
    at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:580)
    at org.hibernate.loader.L
10:57:44,786 INFO  [STDOUT] oader.doQuery(Loader.java:701)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
    at org.hibernate.loader.Loader.loadCollection(Loader.java:1994)
    at org.hibernate.loader.collection.BatchingCollectionInitializer.initialize(BatchingCollectionInitializer.java:52)
java hibernate jpa
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