kotlin-jpa-example.kt

abstract class Entity<T : Serializable> {

    abstract var id: T

    override fun equals(other: Any?): Boolean = when {
        this === other                                        -> true
        other == null                                         -> false
        Hibernate.getClass(other) != Hibernate.getClass(this) -> false
        else                                                  -> Objects.equals(id, (other as Entity<*>).id)
    }

    override fun hashCode(): Int = id.hashCode()

    override fun toString(): String = "${javaClass.simpleName}#${this.id}"
}


@Entity
@Table(name = SomeRule.TABLE_NAME, schema = Config.SCHEMA)
class SomeRule @JvmOverloads constructor(

    @get:Id
    @get:GeneratedValue(strategy = GenerationType.SEQUENCE, generator = GENERATOR)
    @get:SequenceGenerator(name = GENERATOR, sequenceName = GENERATOR)
    @get:Column(name = ID_COLUMN)
    @get:NotNull
    override var id: Long = 0,

    @get:Type(type = ZipRangeUserType.USER_TYPE_NAME)
    @get:Column(name = "zipRange", length = 1024)
    var zipRange: ZipRange? = null,

    @get:NotNull
    var baz: String

) : Entity<Long>() {

    companion object {
        const val TABLE_NAME = "SomeRule"
        const val ID_COLUMN = "${TABLE_NAME}_id"
        private const val GENERATOR = "${Config.SCHEMA}.${ID_COLUMN}_seq"
    }
}