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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2011, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.dbc;
/** An ISO-9075:2003 (SQL) data type. Mappings between SQL types and
* database specific types should be provided by the database driver.
*/
abstract class DataType {
/** Tests whether this datatype is equivalent to another. Usually, two
* types are defined as equivalent if they are equal. Two types can be
* equivalent without being equal if values of those types will be
* encoded in the same native Scala type.
*/
def isEquivalent(datatype: DataType): Boolean;
/** Tests whether this datatype is equivalent or a subtype of another
* datatype. Type <code>A</code> is said to be subtype of type
* <code>B</code> if any value of type <code>A</code> can be
* represented as a value of type <code>B</code>.
*/
def isSubtypeOf(datatype: DataType): Boolean;
/** The native Scala type in which values of this SQL type will be
* encoded.
*/
type NativeType <: Any;
/** The native Scala type in which values of this SQL type will be
* encoded. This must point to the same type as <code>NativeType</code>.
*/
def nativeTypeId: DataType.Id;
/** Whether the value can take the null value, None when this property is
* unknown.
*/
def nullable: Option[Boolean] = None;
/** The SQL name of the type */
def sqlString: String = "UNDEFINED DATA TYPE"
}
object DataType {
type Id = Int;
val OBJECT : Id = 10;
val BOOLEAN : Id = 20;
val BYTE : Id = 30;
val SHORT : Id = 31;
val INT : Id = 32;
val LONG : Id = 33;
val BIG_INTEGER: Id = 34;
val BIG_DECIMAL: Id = 35;
val FLOAT : Id = 40;
val DOUBLE : Id = 41;
val STRING : Id = 50;
}
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