JPA self join table

In my project, we have some properties which have a bunch of sub properties. For example

CA=Canada
    |—AB= Alberta
    |—BC= British Columbia
I generated a self join table tproperty.

Here is the entity.

public class PropertyImpl extends AbstractEntityImpl implements Property {     private long uidPk; 
  
    private String groupName; 
  
    private String code; 
  
    private Property parentProperty; 
  
    private Set<Property> subProperties; 
  
    private Collection<PropertyValue> propertyValues;     
@OneToMany(targetEntity = PropertyImpl.class, fetch = FetchType.EAGER, cascade = { CascadeType.ALL },
     mappedBy = "parentProperty") 

    public Set<Property> getSubProperties() { 
        return subProperties; 

    }     
    public void setSubProperties(Set<Property> subProperties) { 
  
        this.subProperties = subProperties; 
  
        if (subProperties != null) { 
  
            for (Property property : subProperties) { 
  
                property.setParentProperty(this); 
  
            } 
  
        } 
  
    }    

  @ManyToOne(targetEntity = PropertyImpl.class) 
    @JoinColumn(name = "PARENT_PROPERTY_UID", nullable = true) 
  
    public Property getParentProperty() { 
  
        return parentProperty; 
  
    }     
    public void setParentProperty(Property parentProperty) { 
  
        this.parentProperty = parentProperty; 
  
    }
…
}