@Enumerated JPA Example

The @Enumerated annotation is used to specify that an entity attribute represents an enumerated type.

An enum type is mapped to a database via the @javax.persistence.Enumerated annotation.

There are two strategies to store enum values in the database -

1. @Enumerated(EnumType.ORDINAL) → Store the enum values according the ordinal position (i.e. 0 , 1, 2 … ) of enum value.
2. @Enumerated(EnumType.STRING) → Store the enum values according to the name of the enum value. The default is EnumType.ORDINAL.

@Enumerated - JPA Annotation Example

@Enumerated(String) Example

Let's look at how to map enum types using @javax.persistence.Enumerated annotation with the below snippets.

Consider the following enum types -

package net.javaguides.hibernate.entity;

public enum ProjectStatus {
    OPEN,
    INPROGESS,
    RESUME,
    COMPLETED,
    CLOSED;
}

Let's use and map this enum in Project entity class -

@Entity
@Table(name = "project")
public class Project {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private int id;

    @Column(name = "project_name")
    private String projectName;

    @Enumerated(EnumType.STRING)
    @Column(name = "project_status")
    private ProjectStatus projectStatus;

    // getter and setters
}

@Enumerated(ORDINAL) Example

Consider the following enum types -

package net.javaguides.hibernate.entity;

public enum ProjectStatus {
    OPEN,
    INPROGESS,
    RESUME,
    COMPLETED,
    CLOSED;
}

Let's use and map this enum in Project entity class -

@Entity
@Table(name = "project")
public class Project {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private int id;

    @Column(name = "project_name")
    private String projectName;

    @Enumerated(EnumType.ORDINAL)
    @Column(name = "project_status")
    private ProjectStatus projectStatus;

    // getter and setters
}

Check out the complete tutorial at https://www.javaguides.net/2018/11/hibernate-5-enum-type-mapping-example.html.

References

• https://www.javaguides.net/2018/11/hibernate-5-enum-type-mapping-example.html.
• https://javaee.github.io/javaee-spec/javadocs/javax/persistence/Enumerated.html