JPA filter entity nested list of objects - jpa

Question

I'm Using JPA 2.1. I have 3 entities: Dr01 , Dr02 and Dr03 with the following structure:
public class Dr01 implements Serializable {
#OneToMany(cascade = CascadeType.ALL, mappedBy = "dr01")
private List<Dr02> dr02List;
}
public class Dr02 implements Serializable {
#OneToMany(cascade = CascadeType.ALL, mappedBy = "dr02")
private List<Dr03> dr03List;
#JoinColumn(name = "DR2CLM", referencedColumnName = "DR1CLM", insertable = false, updatable = false)
#ManyToOne(optional = false)
private Dr01 dr01;
}
public class Dr03 implements Serializable {
#JoinColumns({
#JoinColumn(name = "DR3CLM", referencedColumnName = "DR2CLM", insertable = false, updatable = false),
#JoinColumn(name = "DR3PTFN", referencedColumnName = "DR2PTFN", insertable = false, updatable = false)})
#ManyToOne(optional = false)
private Dr02 dr02;
private elementOBJ element;
}
public class elementOBJ implements Serializable {
#Column(name = "XXX")
private int id;
#Column(name = "YYY")
private int status;
}
I want to select from Dr01 and get only the Dr03 objects that have element objects which contains a value of 1 inside the status field.
How do I retrieve dr03List filtered by it's status value? (filtered not after the select).
Thank's In Advance.

Answer 1

Options that may be of assistance:
Create a DB view based on status of DR03 table and map your
entity to that.
Use JPA Inheritance using status as a
DiscriminatorColumn.
If using Hibernate use the non-JPA #Where
annotation to filter the collection