Meta

Metadata defining the column-level mapping to and from Scala type A. A given Scala type might be read from or written to columns with a variety of JDBC and/or vendor-specific types, depending on supported coercions and luck.

Reading and writing values to JDBC is asymmetric with respect to null, is complicated by unboxed types, and is not consistent with idiomatic Scala; so some discussion is required. Scala values should never be null. Setting a NULL JDBC value is accomplished via the setNull operation. Similarly when getting a JDBC value we must subsequently ask .wasNull on the JDBC resource and decide how to handle the value. The Atom typeclass takes care of mapping nullable values to Option so these issues should not be a concern for casual users.

Annotations: @implicitNotFound( ... )
Source: meta.scala

Linear Supertypes

AnyRef, Any

Known Subclasses

AdvancedMeta, BasicMeta

Abstract Value Members

abstract def fold[B](f: (BasicMeta[A]) ⇒ B, g: (AdvancedMeta[A]) ⇒ B): B

Switch on the flavor of this Meta.
abstract def jdbcSource: NonEmptyList[JdbcType]

Source JDBC types from which values of type A can be read.
abstract def jdbcTarget: NonEmptyList[JdbcType]

Destination JDBC types to which values of type A can be written.
abstract def scalaType: String

Name of the Scala type, for diagnostic purposes.
Name of the Scala type, for diagnostic purposes. Smart constructors require a TypeTag to guarantee this value is correct.
abstract def xmap[B](f: (A) ⇒ B, g: (B) ⇒ A)(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[B]): Meta[B]

Invariant map.

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
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final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
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final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
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final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def unsafeGetNonNullable(rs: ResultSet, n: Int): A
final def unsafeGetNullable(rs: ResultSet, n: Int): Option[A]
final def unsafeSetNonNullable(ps: PreparedStatement, n: Int, a: A): Unit
final def unsafeSetNull(ps: PreparedStatement, n: Int): Unit
final def unsafeSetNullable(ps: PreparedStatement, n: Int, oa: Option[A]): Unit
final def unsafeUpdateNonNullable(rs: ResultSet, n: Int, a: A): Unit
final def unsafeUpdateNullable(rs: ResultSet, n: Int, oa: Option[A]): Unit
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Deprecated Value Members

def nxmap[B >: Null](f: (A) ⇒ B, g: (B) ⇒ A)(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[B], ev: <:<[Null, A]): Meta[B]

Invariant map with null handling, for A, B >: Null; the functions f and g will never be passed a null value.
Invariant map with null handling, for A, B >: Null; the functions f and g will never be passed a null value.

Annotations
@deprecated
Deprecated
(Since version 0.4.2) Null is no longer observable here; just use xmap.

Related Docs: object Meta | package meta

sealed abstract class Meta[A] extends AnyRef

Abstract Value Members

abstract def fold[B](f: (BasicMeta[A]) ⇒ B, g: (AdvancedMeta[A]) ⇒ B): B

abstract def jdbcSource: NonEmptyList[JdbcType]

abstract def jdbcTarget: NonEmptyList[JdbcType]

abstract def scalaType: String

abstract def xmap[B](f: (A) ⇒ B, g: (B) ⇒ A)(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[B]): Meta[B]

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def unsafeGetNonNullable(rs: ResultSet, n: Int): A

final def unsafeGetNullable(rs: ResultSet, n: Int): Option[A]

final def unsafeSetNonNullable(ps: PreparedStatement, n: Int, a: A): Unit

final def unsafeSetNull(ps: PreparedStatement, n: Int): Unit

final def unsafeSetNullable(ps: PreparedStatement, n: Int, oa: Option[A]): Unit

final def unsafeUpdateNonNullable(rs: ResultSet, n: Int, a: A): Unit

final def unsafeUpdateNullable(rs: ResultSet, n: Int, oa: Option[A]): Unit

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Deprecated Value Members

def nxmap[B >: Null](f: (A) ⇒ B, g: (B) ⇒ A)(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[B], ev: <:<[Null, A]): Meta[B]

Inherited from AnyRef

Inherited from Any

Ungrouped