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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2005, 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 A is said to be subtype of type B if any value of type A
* can be represented as a value of type B. */
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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