CREATE TYPE SERIALIZABLE EXTERNAL NAME 'java.io.Serializable' LANGUAGE JAVA;

CREATE TABLE PROPERTY_SETTING (
	ACTIVITY_ID INTEGER NOT NULL CONSTRAINT PROPERTY_SETTING_ACTIVITY_FK REFERENCES ACTIVITY(ID),
	PROPERTY_ID INTEGER NOT NULL CONSTRAINT PROPERTY_SETTING_PROPERTY_FK REFERENCES PROPERTY(ID),
	SETTING SERIALIZABLE,
	PRIMARY KEY (ACTIVITY_ID, PROPERTY_ID));

@Entity
@Table(name = "PROPERTY_SETTING")
public class JpaPropertySetting implements Serializable {
  private static final long serialVersionUID = 1L;
  @EmbeddedId
  protected JpaPropertySettingPK jpaPropertySettingPK;
  @Column(name = "SETTING")
  private Serializable setting;
  @JoinColumn(name = "PROPERTY_ID", referencedColumnName = "ID", insertable = false, updatable = false)
  @ManyToOne(optional = false)
  private JpaProperty jpaProperty;
  @JoinColumn(name = "ACTIVITY_ID", referencedColumnName = "ID", insertable = false, updatable = false)
  @ManyToOne(optional = false)
  private JpaActivity jpaActivity;

"Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: An attempt was made to put a data value of type 'byte[]' into a data value of type 'JAVA_OBJECT'.
Error Code: 20000
Call: INSERT IGNORE INTO PROPERTY_SETTING (SETTING, ACTIVITY_ID, PROPERTY_ID) VALUES (?, ?, ?)
	bind => [[B@f3436a, 32, 19]
Query: InsertObjectQuery(com.afltools.grid.extension.jpa.JpaPropertySetting[jpaPropertySettingPK=com.afltools.grid.extension.jpa.JpaPropertySettingPK[activityId=32, propertyId=19]])"