@Entity
@Table(
        uniqueConstraints = {
                @UniqueConstraint(columnNames = {Industry.Keys.identifier, Industry.Keys.disciminator})
        }
)
public @Accessors(chain = true) @Getter @Setter class Industry extends EntityId {

        public static enum Keys {
                ;
                public static final String name         = "name"             ;
                public static final String identifier   = "identifier"       ;
                public static final String disciminator = "discriminator"    ;

                public static final String YAHOO        = Exchange.Keys.YAHOO;
        }

        @NotBlank
        @Column(name=Keys.name)
        String name;

        @Column(name = Keys.identifier)
        String identifier;

        @MoInList({Keys.YAHOO})
        @NotBlank
        String discriminator;

        @Override
        public int hashCode() {
                return Objects.hash(identifier, discriminator);
        }

        @Override
        public boolean equals(Object obj) {
                if (this == obj) {
                        return true;
                }
                if (obj == null || getClass() != obj.getClass()) {
                        return false;
                }
                final Industry other = (Industry) obj;
                return Objects.equals(this.identifier, other.identifier) && Objects.equals(this.discriminator, other.discriminator);
        }
}