Поддержка нативных ENUM-ов PostgerSQL в Spring Data JPA

Model.kt

package com.example.project.entity

import org.hibernate.annotations.Type
import org.hibernate.annotations.TypeDef
import com.example.project.enumeration.PostgreSQLEnumType
import com.example.project.enumeration.ModelStatus
import javax.persistence.Column
import javax.persistence.Entity
import javax.persistence.EnumType
import javax.persistence.Enumerated
import javax.persistence.Id
import javax.persistence.Table

@Entity
@Table(name = "models")
@TypeDef(name = "postgresql_enum", typeClass = PostgreSQLEnumType::class)
class Model(
        @Id
        val id: Int? = null,
  
        @Enumerated(EnumType.STRING)
        @Column(nullable = false, columnDefinition = "status")
        @Type(type = "postgresql_enum")
        val status: ModelStatus
)

ModelStatus.kt

package com.example.project.enumeration

/**
 * Model status
 */
enum class ModelStatus {
    DRAFT,
    OPENED,
    CLOSED,
    ARCHIVED
}

PostgreSQLEnumType.kt

package com.example.project.enumeration

import org.hibernate.HibernateException
import org.hibernate.engine.spi.SharedSessionContractImplementor
import org.hibernate.type.EnumType
import java.sql.PreparedStatement
import java.sql.SQLException
import java.sql.Types

class PostgreSQLEnumType : EnumType<Enum<*>?>() {
    @Throws(HibernateException::class, SQLException::class)
    override fun nullSafeSet(
            statement: PreparedStatement,
            value: Any?,
            index: Int,
            session: SharedSessionContractImplementor) {
        val obj = if (value != null) (value as Enum<*>).name else null

        statement.setObject(index, obj, Types.OTHER)
    }
}