I am looking into creating a class in such a way that it can hold references to itself and a parent. In other words, I am looking to make a bi-directional tree of these classes.
The class would like something like this:
@Entity
@Table(name="sample")
public class Sample {
private String id;
private Sample parent;
private Set<Sample> children;
@Id
@Column(name="id");
public String getId(){ return id; }
public void setId(String id) { this.id=id; }
/** This is where I am confussed.... **/
}The proposed table for the above would be:
varchar(256) id
varchar(256) parentId
I have made plenty of classes that reference one-to-many one way, and many-to-one the other, but this is the first time I have tried to make these connections within the same class. I guess I am just getting confused how to setup the JoinColumn name and the mappedBy in the annotations to work off a single table column within a single table.
