Interface BiDirectionalFetch

All Superinterfaces:
DomainResultGraphNode, Fetch
public interface BiDirectionalFetch extends Fetch

Marker interface for Fetches that are actually references to another fetch based on "normalized navigable path" The following query is used throughout the javadocs for these impls to help describe what it going on and why certain methods do certain things.

@Entity
class Person {
    ...
    @ManyToOne (mappedBy="owner")
    Address getAddress() {...}
}

@Entity
class Address {
    ...
    @ManyToOne
    Person getOwner() {...}
}

from Person p
		join fetch p.address a
		join fetch a.owner o
		join fetch o.address oa

Here we have one root result and 3 fetches. 2 of the fetches are bidirectional: o:: The paths p and p.address.owner (aliased as o) are the same table reference in SQL terms oa:: The paths p.address and p.address.owner.address (aliased as oa) are again the same table reference

  • Method Details

    • getReferencedPath

      NavigablePath getReferencedPath()
      The NavigablePath for the DomainResult or Fetch that this Fetch refers to. For o, the referenced path is p. For oa, it's p.address Different from Fetch.getNavigablePath() which returns this fetch's path, i.e. p.address.owner and p.address.owner.address respectively

    • collectValueIndexesToCache

      default void collectValueIndexesToCache(BitSet valueIndexes)
      Description copied from interface: DomainResultGraphNode
      Collect the JDBC value indexes used by this domain result that should be cached.
      Specified by:
      collectValueIndexesToCache in interface DomainResultGraphNode