CellDecoder

Decodes CSV cells into usable types.

By itself, an instance of CellDecoder is not terribly interesting. It becomes useful when combined with RowDecoder, which relies on any implicit CellDecoder it has in scope to parse entire rows.

If, for example, you need to parse CSV data that contains ISO 8601 formatted dates, you can't immediately call CsvInput.reader with a type argument of List[Date]: dates are not supported natively (because they can be serialised in so many different ways).

This can be remedied simply by writing the following:

implicit val dateDecoder = CellDecoder(s => DecodeResult(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ").parse(s)))

See the companion object for default implementations and construction methods.

See also: Tutorial

Linear Supertypes

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Known Subclasses

CellCodec

Abstract Value Members

abstract def decode(s: String): DecodeResult[A]

Turns the content of a CSV cell into an A.
Turns the content of a CSV cell into an A.

Annotations
@noop()

Concrete Value Members

final def !=(arg0: AnyRef): Boolean

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

Definition Classes
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final def ##(): Int

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final def ==(arg0: AnyRef): Boolean

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final def ==(arg0: Any): Boolean

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final def asInstanceOf[T0]: T0

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def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
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Annotations
@throws( ... )
def decode(ss: Seq[String], index: Int): DecodeResult[A]

Turns the content of the specified cell into an A.
Turns the content of the specified cell into an A.
The purpose of this method is to protect against index out of bound exceptions. Should the specified index not exist, a DecodeResult.DecodeFailure instance will be returned.

Annotations
@noop()
final def eq(arg0: AnyRef): Boolean

Definition Classes
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def equals(arg0: Any): Boolean

Definition Classes
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def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
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Annotations
@throws( classOf[java.lang.Throwable] )
def flatMap[B](f: (A) ⇒ CellDecoder[B]): CellDecoder[B]

Annotations
@noop()
final def getClass(): Class[_]

Definition Classes
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def hashCode(): Int

Definition Classes
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final def isInstanceOf[T0]: Boolean

Definition Classes
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def map[B](f: (A) ⇒ B): CellDecoder[B]

Turns an instance of CellDecoder[A] into one of CellDecoder[B].
Turns an instance of CellDecoder[A] into one of CellDecoder[B].
This allows developers to adapt existing instances of CellDecoder rather than write one from scratch.

Annotations
@noop()
final def ne(arg0: AnyRef): Boolean

Definition Classes
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final def notify(): Unit

Definition Classes
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final def notifyAll(): Unit

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

Definition Classes
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def toString(): String

Definition Classes
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def unsafeDecode(ss: Seq[String], index: Int): A

Annotations
@noop()
def unsafeDecode(s: String): A

Annotations
@noop()
final def wait(): Unit

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

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

Definition Classes
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Annotations
@throws( ... )

trait CellDecoder[A] extends AnyRef

Abstract Value Members

abstract def decode(s: String): DecodeResult[A]

Concrete Value Members

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def decode(ss: Seq[String], index: Int): DecodeResult[A]

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

def flatMap[B](f: (A) ⇒ CellDecoder[B]): CellDecoder[B]

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

def map[B](f: (A) ⇒ B): CellDecoder[B]

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

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

def toString(): String

def unsafeDecode(ss: Seq[String], index: Int): A

def unsafeDecode(s: String): A

final def wait(): Unit

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

final def wait(arg0: Long): Unit

Inherited from AnyRef

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