Packages

trait Output extends Any

Represents an abstract sink to which a value may be serialized (written). An Output instance should be assumed to be stateful. After calling any of the write methods, it MUST NOT be reused. This means that Output instance can be used only to write a single value. However, if the value to write is complex, one can use writeList/writeSet or writeObject/writeMap.

Linear Supertypes
Any
Known Subclasses
BsonOutput, BsonValueOutput, BsonWriterNamedOutput, BsonWriterOutput, RedisDataOutput, OutputAndSimpleOutput, OutputWrapper, SimpleValueOutput, StreamOutput, CborOutput, JsonStringOutput
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Abstract Value Members

  1. abstract def getClass(): Class[_]
    Definition Classes
    Any
  2. abstract def writeList(): ListOutput
  3. abstract def writeNull(): Unit
  4. abstract def writeObject(): ObjectOutput
  5. abstract def writeSimple(): SimpleOutput

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    Any
  2. final def ##(): Int
    Definition Classes
    Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def equals(arg0: Any): Boolean
    Definition Classes
    Any
  6. def hashCode(): Int
    Definition Classes
    Any
  7. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  8. def keepsMetadata(metadata: InputMetadata[_]): Boolean

    Determines whether serialization format implemented by this Output preserves particular arbitrary "metadata" which is identified by InputMetadata which is usually an object (e.g.

    Determines whether serialization format implemented by this Output preserves particular arbitrary "metadata" which is identified by InputMetadata which is usually an object (e.g. companion object of metadata value type T). An example of InputMetadata is JsonType supported by JsonStringOutput.

    If this method returns true then codec may optimize its encoded format and assume that a corresponding Input implementation will return a non-empty Opt from its readMetadata implementation when passed the same InputMetadata identifier. If this method returns false then this Output does not support this medatata type and codec should fall back to some other serialization strategy.

  9. def legacyOptionEncoding: Boolean

    This ugly workaround has been introduced when standard Option encoding changed from zero-or-one element list encoding to unwrapped-or-null encoding which effectively disallowed serializing null and Some(null).

    This ugly workaround has been introduced when standard Option encoding changed from zero-or-one element list encoding to unwrapped-or-null encoding which effectively disallowed serializing null and Some(null). If some Output implementation still wants to use the list encoding, it may do it by overriding this method and returning true.

  10. def toString(): String
    Definition Classes
    Any
  11. def writeCustom[T](typeMarker: TypeMarker[T], value: T): Boolean

    Attempts to write some arbitrary custom "native" value that this output may or may not support.

    Attempts to write some arbitrary custom "native" value that this output may or may not support. The custom type is identified by an instance of TypeMarker which is usually an object (e.g. companion object of the custom T type itself). This way Input and Output implementations may support other native types than the ones supported by default by Input and Output interfaces.

    Codecs may use this method to optimize encoded format in case it it possible with particular Output implementation. GenCodec may generally assume that if this method returns true then corresponding Input will return a non-empty Opt from readCustom method.

    false returned by this method indicates that this output does not support this particular type. In such situation the codec must fall back to some other strategy. If the native type is supported but there was some error writing it then a WriteFailure should be thrown instead of returning false.

Inherited from Any

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