Java Community | Help. Code. Learn.•3d ago

Java Hibernate with Negative Enums

I'm using Hibernate for JPA for persisting objects to my database. One class has four possible statuses that I want to represent with an enum, and I want to use a negative status for DELETED for consistency with previous classes:

public enum Status {
  PENDING (0)
  APPROVED(1)
  DECLINED(2)
  DELETED(-1)

  private int numVal;

  Status(int numVal) {
    this.numVal = numVal;
  }
        
  public int getNumVal() {
    return numVal;
  }
}

public enum Status {
  PENDING (0)
  APPROVED(1)
  DECLINED(2)
  DELETED(-1)

  private int numVal;

  Status(int numVal) {
    this.numVal = numVal;
  }
        
  public int getNumVal() {
    return numVal;
  }
}

However, Hibernate doesn't like this and is throwing an exception:

...
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 4
    at org.hibernate@5.3.20.Final-redhat-00001//org.hibernate.type.descriptor.java.EnumJavaTypeDescriptor.fromOrdinal(EnumJavaTypeDescriptor.java:76)
    at org.hibernate@5.3.20.Final-redhat-00001//org.hibernate.metamodel.model.convert.internal.OrdinalEnumValueConverter.toDomainValue(OrdinalEnumValueConverter.java:38)
...

...
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 4
    at org.hibernate@5.3.20.Final-redhat-00001//org.hibernate.type.descriptor.java.EnumJavaTypeDescriptor.fromOrdinal(EnumJavaTypeDescriptor.java:76)
    at org.hibernate@5.3.20.Final-redhat-00001//org.hibernate.metamodel.model.convert.internal.OrdinalEnumValueConverter.toDomainValue(OrdinalEnumValueConverter.java:38)
...

Is there a simple way to tell Hibernate to allow the negative Enum value? Or do I have to use non-negative values?

8 Replies

JavaBot•3d ago

⌛ This post has been reserved for your question.

Hey @AgentMime! Please use /close or the Close Post button above when your problem is solved. Please remember to follow the help guidelines. This post will be automatically closed after 300 minutes of inactivity.

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Kyo-chan•3d ago

Just make it a user type. If you want Hibernate to use an enum automatically, it will just do the simplest and use their ordinal number.

dan1st•3d ago

Alternatively https://stackoverflow.com/a/41645518/10871900

Stack Overflow

Hibernate map enum by property value

I'm trying to do the following using Hibernate: When an object is saved to the DB, it is saved as a the value of the enum's name property. When an object is retrieved from the DB, the object reads...

AgentMime•3d ago

What do you mean by "user" type?

Kyo-chan•3d ago

....... New game: before you ask a question like this one you first assume it must have some meaning and you freaking google it

AgentMime•3d ago

Fair enough lol

dan1st•3d ago

what a fun game 😂 - but beware the dangers of learning something on the way

JavaBot•3d ago

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Java Hibernate with Negative Enums