javax.persistence.UniqueConstraint Maven / Gradle / Ivy
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package javax.persistence;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* This annotation is used to specify that a unique constraint
* is to be included in the generated DDL for a primary or secondary table.
*
*
* Example:
* @Entity
* @Table(
* name="EMPLOYEE",
* uniqueConstraints=
* @UniqueConstraint(columnNames={"EMP_ID", "EMP_NAME"})
* )
* public class Employee { ... }
*
*
* @since Java Persistence 1.0
*/
@Target({})
@Retention(RUNTIME)
public @interface UniqueConstraint {
/** (Required) An array of the column names that make up the constraint. */
String[] columnNames();
}