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POOneToOne custom join query
 

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    <p>I want to have custom join query for OneToOne relationships. I need to add one more clause to where part, because without it I get <code>More than one row with the given identifier was found: com.example.Container_$$_javassist_0@17156065, for class: com.example.AnyContainer</code> Is it possible to do that?</p> <p>Container.java</p> <pre><code>@Entity @Table(name = "container") @Inheritance(strategy = InheritanceType.JOINED) public abstract class Container implements Serializable { private String oid; private Long id; @Id @GeneratedValue(generator = "ContainerIdGenerator") @GenericGenerator(name = "ContainerIdGenerator", strategy = "com.example.ContainerIdGenerator") @Column(name = "id") public Long getId() { return id; } @Id @GeneratedValue(generator = "OidGenerator") @GenericGenerator(name = "OidGenerator", strategy = "com.example.OidGenerator") @Column(unique = true, nullable = false, updatable = false, length = 36) public String getOid() { return oid; } ..other getters/setters } </code></pre> <p>O.java: Hibernate will use <code>select c.ownerType, c.owner_oid, c.owner_id from any c where c.owner_oid=? and c.owner_id=?</code> query but here I want to use something like this <code>from AnyContainer as c where c.owner = ? and c.ownerType = 0</code> for as join query. and for ? there should be owner as usual. I added there one more condition -> <code>ownerType = 0</code></p> <pre><code>@Entity @Table(name = "object") @ForeignKey(name = "fk_container") public abstract class O extends Container { private AnyContainer extension; @OneToOne(optional = true, mappedBy = "owner") @ForeignKey(name = "none") @Cascade({org.hibernate.annotations.CascadeType.ALL}) public AnyContainer getExtension() { return extension; } ...other getters/setters } </code></pre> <p>ResourceObjectShadow.java: Hibernate will use <code>select c.ownerType, c.owner_oid, c.owner_id from any c where c.owner_oid=? and c.owner_id=?</code> query but here I want to use something like this <code>from AnyContainer as c where c.owner = ? and c.ownerType = 1</code> for as join query. and for ? there should be owner as usual. I added there one more condition -> <code>ownerType = 1</code></p> <pre><code>@Entity @Table(name = "resource_shadow") @ForeignKey(name = "fk_resource_object_shadow") public class ResourceObjectShadow extends O { private AnyContainer attributes; @OneToOne(optional = true, mappedBy = "owner") @Cascade({org.hibernate.annotations.CascadeType.ALL}) public AnyContainer getAttributes() { return attributes; } ...other getters/setters } @Entity @Table(name = "any") public class AnyContainer implements Serializable { private RContainerType ownerType; private Container owner; @ForeignKey(name = "fk_reference_owner") @MapsId("owner") @OneToOne(fetch = FetchType.LAZY) @PrimaryKeyJoinColumns({ @PrimaryKeyJoinColumn(name = "owner_oid", referencedColumnName = "ownerOid"), @PrimaryKeyJoinColumn(name = "owner_id", referencedColumnName = "id") }) public Container getOwner() { return owner; } ..other getters/setters } </code></pre> <p>RContainerType.java</p> <pre><code>public enum RContainerType { O, RESOURCE_OBJECT_SHADOW } </code></pre> <p>Edit: Updated <code>ManyToOne</code> -> to <code>OneToOne</code> in <code>AnyContainer</code> I tried to user <code>@Loader</code> with named query annotated on class <code>O</code> and <code>ResourceObjectShadow</code>, but it wasn't used. Also I tried only as test to use it on <code>AnyContainer</code> class, but wasn't used at all.</p> <p>How to handle custom join for that <code>OneToOne</code> relationship in <code>O</code> and <code>ResourceObjectShadow</code>? Is there way to do it programmatically (for example through custom tuplizer or something like that)?</p>
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