I have been looking into JPA/Hibernate @Entity inheritance for a while now and can't seem to find anything that addresses what I am trying to achieve.
Basically I want to be able to define an @Entity with all of the column and table mappings as required. Then I want to be able to extend the @Entity in a number of different locations with different sets of @Transient methods defined in the body of each "sub-Entity". This is a basic example of what I am trying to achieve but with no success thus far:
@Entity
@Table(name = "mountain")
public class MountainEntityBase implements Serializable {
public Integer mountainId = 0;
public Integer height = 0;
public List<ExplorerEntityBase> explorers = new ArrayList<ExplorerEntityBase>();
@Id
@GeneratedValue
@Column(name = "mountain_id")
public Integer getMountainId() { return mountainId; }
public void setMountainId(Integer mountainId) { this.mountainId = mountainId; }
@Column(name="height")
public String getHeight() { return height; }
public void setHeight(String height) { this.height = height; }
@OneToMany(mappedBy="mountainId")
public List<ExplorerEntityBase> getExplorers() { return this.explorers; }
public void setExplorers(List<ExplorerEntityBase> explorers) { this.explorers = explorers; }
}
.
@Entity
public class MountainEntity extends MountainEntityBase implements Serializable {
public List<MountainEntity> allMountainsExploredBy = new ArrayList<MountainEntity>();
@Transient
public List<MountianEntity> getAllMountainsExploredBy(String explorerName){
// Implementation
}
}
So any extended class will define only @Transients in its body. But also I want to allow for situations where the child class is empty:
@Entity
public class MountainEntity extends MountainEntityBase implements Serializable {
}
Thanks in advance for any help with this.
