Class

scala

Enumeration

Related Doc: package scala

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abstract class Enumeration extends Serializable

Defines a finite set of values specific to the enumeration. Typically these values enumerate all possible forms something can take and provide a lightweight alternative to case classes.

Each call to a Value method adds a new unique value to the enumeration. To be accessible, these values are usually defined as val members of the evaluation.

All values in an enumeration share a common, unique type defined as the Value type member of the enumeration (Value selected on the stable identifier path of the enumeration instance).

Self Type
Enumeration
Annotations
@SerialVersionUID()
Source
Enumeration.scala
Example:
  1. object Main extends App {
      object WeekDay extends Enumeration {
        type WeekDay = Value
        val Mon, Tue, Wed, Thu, Fri, Sat, Sun = Value
      }
      import WeekDay._
      def isWorkingDay(d: WeekDay) = ! (d == Sat || d == Sun)
      WeekDay.values filter isWorkingDay foreach println
    }
    // output:
    // Mon
    // Tue
    // Wed
    // Thu
    // Fri
Linear Supertypes
Serializable, java.io.Serializable, AnyRef, Any
Known Subclasses
Ordering
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  2. By Inheritance
Inherited
  1. Enumeration
  2. Serializable
  3. Serializable
  4. AnyRef
  5. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new Enumeration()

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  2. new Enumeration(initial: Int)

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    initial

    The initial value from which to count the integers that identifies values at run-time.

Type Members

  1. class Val extends Value with Serializable

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    A class implementing the scala.Enumeration.Value type.

    A class implementing the scala.Enumeration.Value type. This class can be overridden to change the enumeration's naming and integer identification behaviour.

    Attributes
    protected
    Annotations
    @SerialVersionUID()
  2. abstract class Value extends Ordered[Value] with Serializable

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    The type of the enumerated values.

    The type of the enumerated values.

    Annotations
    @SerialVersionUID()
  3. class ValueSet extends AbstractSet[Value] with SortedSet[Value] with SortedSetLike[Value, ValueSet] with Serializable

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    A class for sets of values.

    A class for sets of values. Iterating through this set will yield values in increasing order of their ids.

Value Members

  1. final def !=(arg0: Any): Boolean

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    Test two objects for inequality.

    Test two objects for inequality.

    returns

    true if !(this == that), false otherwise.

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

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    Equivalent to x.hashCode except for boxed numeric types and null.

    Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

    returns

    a hash value consistent with ==

    Definition Classes
    AnyRef → Any
  3. def +(other: String): String

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    Implicit information
    This member is added by an implicit conversion from Enumeration to any2stringadd[Enumeration] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Enumeration, B)

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    Implicit information
    This member is added by an implicit conversion from Enumeration to ArrowAssoc[Enumeration] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean

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    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes
    AnyRef → Any
  6. final def Value(i: Int, name: String): Value

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    Creates a fresh value, part of this enumeration, called name and identified by the integer i.

    Creates a fresh value, part of this enumeration, called name and identified by the integer i.

    i

    An integer that identifies this value at run-time. It must be unique amongst all values of the enumeration.

    name

    A human-readable name for that value.

    returns

    Fresh value with the provided identifier i and name name.

    Attributes
    protected
  7. final def Value(name: String): Value

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    Creates a fresh value, part of this enumeration, called name.

    Creates a fresh value, part of this enumeration, called name.

    name

    A human-readable name for that value.

    returns

    Fresh value called name.

    Attributes
    protected
  8. final def Value(i: Int): Value

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    Creates a fresh value, part of this enumeration, identified by the integer i.

    Creates a fresh value, part of this enumeration, identified by the integer i.

    i

    An integer that identifies this value at run-time. It must be unique amongst all values of the enumeration.

    returns

    Fresh value identified by i.

    Attributes
    protected
  9. final def Value: Value

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    Creates a fresh value, part of this enumeration.

    Creates a fresh value, part of this enumeration.

    Attributes
    protected
  10. object ValueOrdering extends Ordering[Value]

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    An ordering by id for values of this set

  11. object ValueSet extends Serializable

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    A factory object for value sets

  12. final def apply(x: Int): Value

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    The value of this enumeration with given id x

  13. final def asInstanceOf[T0]: T0

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    Cast the receiver object to be of type T0.

    Cast the receiver object to be of type T0.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

    returns

    the receiver object.

    Definition Classes
    Any
    Exceptions thrown

    ClassCastException if the receiver object is not an instance of the erasure of type T0.

  14. def clone(): AnyRef

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    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
    Note

    not specified by SLS as a member of AnyRef

  15. def ensuring(cond: (Enumeration) ⇒ Boolean, msg: ⇒ Any): Enumeration

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    Implicit information
    This member is added by an implicit conversion from Enumeration to Ensuring[Enumeration] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. def ensuring(cond: (Enumeration) ⇒ Boolean): Enumeration

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    Implicit information
    This member is added by an implicit conversion from Enumeration to Ensuring[Enumeration] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  17. def ensuring(cond: Boolean, msg: ⇒ Any): Enumeration

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    Implicit information
    This member is added by an implicit conversion from Enumeration to Ensuring[Enumeration] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  18. def ensuring(cond: Boolean): Enumeration

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    Implicit information
    This member is added by an implicit conversion from Enumeration to Ensuring[Enumeration] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  19. final def eq(arg0: AnyRef): Boolean

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    Tests whether the argument (that) is a reference to the receiver object (this).

    Tests whether the argument (that) is a reference to the receiver object (this).

    The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:

    • It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.
    • For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
    • null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    returns

    true if the argument is a reference to the receiver object; false otherwise.

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

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    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to eq.

    See also equals in scala.Any.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes
    AnyRef → Any
  21. def finalize(): Unit

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    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
    Note

    not specified by SLS as a member of AnyRef

  22. def formatted(fmtstr: String): String

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    Returns string formatted according to given format string.

    Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

    Implicit information
    This member is added by an implicit conversion from Enumeration to StringFormat[Enumeration] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  23. final def getClass(): Class[_]

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    A representation that corresponds to the dynamic class of the receiver object.

    A representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    Definition Classes
    AnyRef → Any
    Note

    not specified by SLS as a member of AnyRef

  24. def hashCode(): Int

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    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

    the hash code value for this object.

    Definition Classes
    AnyRef → Any
  25. final def isInstanceOf[T0]: Boolean

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    Test whether the dynamic type of the receiver object is T0.

    Test whether the dynamic type of the receiver object is T0.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    Definition Classes
    Any
  26. final def maxId: Int

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    The one higher than the highest integer amongst those used to identify values in this enumeration.

  27. final def ne(arg0: AnyRef): Boolean

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    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

    true if the argument is not a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  28. var nextId: Int

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    The integer to use to identify the next created value.

    The integer to use to identify the next created value.

    Attributes
    protected
  29. var nextName: Iterator[String]

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    The string to use to name the next created value.

    The string to use to name the next created value.

    Attributes
    protected
  30. final def notify(): Unit

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    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  31. final def notifyAll(): Unit

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    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  32. def readResolve(): AnyRef

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    Attributes
    protected
  33. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  34. def toString(): String

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    The name of this enumeration.

    The name of this enumeration.

    returns

    a String representation of the object.

    Definition Classes
    Enumeration → AnyRef → Any
  35. def values: ValueSet

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    The values of this enumeration as a set.

  36. final def wait(): Unit

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

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  39. final def withName(s: String): Value

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    Return a Value from this Enumeration whose name matches the argument s.

    Return a Value from this Enumeration whose name matches the argument s. The names are determined automatically via reflection.

    s

    an Enumeration name

    returns

    the Value of this Enumeration if its name matches s

    Exceptions thrown

    NoSuchElementException if no Value with a matching name is in this Enumeration

  40. def [B](y: B): (Enumeration, B)

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    Implicit information
    This member is added by an implicit conversion from Enumeration to ArrowAssoc[Enumeration] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Serializable

Inherited from java.io.Serializable

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from Enumeration to any2stringadd[Enumeration]

Inherited by implicit conversion StringFormat from Enumeration to StringFormat[Enumeration]

Inherited by implicit conversion Ensuring from Enumeration to Ensuring[Enumeration]

Inherited by implicit conversion ArrowAssoc from Enumeration to ArrowAssoc[Enumeration]

Ungrouped