[hibernate-issues] [Hibernate-JIRA] Created: (ANN-722) ANN-694 alive: FK circularity error under certain circumstances

[Sven Woltmann (JIRA)]

ANN-694 alive: FK circularity error under certain circumstances
---------------------------------------------------------------

                 Key: ANN-722
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-722
             Project: Hibernate Annotations
          Issue Type: Bug
          Components: binder
    Affects Versions: 3.3.1.GA
         Environment: core 3.2.6, annotations 3.3.1.GA, entitymanager 3.3.2.GA, 
mysql 5
            Reporter: Sven Woltmann
            Priority: Blocker
         Attachments: CircularityTest2.rar

The bug described in ANN-694 still exists in 3.3.1.GA under the following circumstances (see below for further description):  

------------------------------------------------------------

@Entity
public class A_PK implements Serializable {
    public D d;

    @ManyToOne
    public D getD() {
	return d;
    }

    public void setD(D d) {
	this.d = d;
    }
}

------------------------------------------------------------

@Entity
public class A implements Serializable {
    private A_PK id;

    @EmbeddedId
    public A_PK getId() {
	return id;
    }

    public void setId(A_PK id) {
	this.id = id;
    }
}

------------------------------------------------------------

@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public class B implements Serializable {
    @Id
    private int id;
}

------------------------------------------------------------

@Entity
public class C extends B implements Serializable {
}

------------------------------------------------------------

public class D_PK implements Serializable {
    private C c;

    @ManyToOne
    public C getC() {
	return c;
    }

    public void setC(C c) {
	this.c = c;
    }
}

------------------------------------------------------------

@Entity
public class D implements Serializable {
    private D_PK id;

    @EmbeddedId
    public D_PK getId() {
	return id;
    }

    public void setId(D_PK id) {
	this.id = id;
    }
}

------------------------------------------------------------

The references are as follows - there are no circularity dependencies:

A --> A_PK --> D --> D_PK --> C --> B

------------------------------------------------------------

Hibernate throws the following exception:

org.hibernate.AnnotationException: Foreign key circularity dependency involving the following tables: D, C, A
	at org.hibernate.cfg.AnnotationConfiguration.processFkSecondPassInOrder(AnnotationConfiguration.java:470)
	at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:304)
	at org.hibernate.cfg.Configuration.generateDropSchemaScript(Configuration.java:762)
	at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:93)
	at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:61)
	at test.DoTest.initTest(DoTest.java:22)

------------------------------------------------------------

When I do any of the following, *no* exception is thrown:

- class A_PK: reference "C" instead of "D" (removing "C" from the dependency chain)
- class A: move annotation from getter to field declaration "private A_PK id"
- class A: replace embedded id "A_PK" by reference to "D" (as in "A_PK")
- class A: rename class to "Z"
- class B: remove "strategy" parameter from "@Inheritance" annotation
- class C: not extending "B" and defining the primary key in "C"
- class C: rename class to "Z"
- class D: move annotation from getter to field declaration "private D_PK id"
- class D: replace embedded id "D_PK" by reference to "C" (as in "D_PK")

Attached you'll find a test case.

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