@Enumerated - JPA Annotation

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


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