Constructor Detail

• Version

  public Version​(ReactiveVariable<?> variable,
                 long version)

  Creates new ReactiveVariable.Version object representing specified version of the ReactiveVariable. This constructor is useful in rare cases, for example when multiple versions have to be merged by taking minimum or maximum. Constructor Version(ReactiveVariable) should be used when just capturing current version.

  Return values of ReactiveVariable.version() are always positive. The version parameter of this constructor additionally allows special zero value.

  Parameters:

  variable - ReactiveVariable that will have its version tracked by this object

  version - non-negative version number tracked by this object

  Throws:

  NullPointerException - if variable is null

  IllegalArgumentException - if version is negative

• Version

  public Version​(ReactiveVariable<?> variable)

  Creates new ReactiveVariable.Version object representing current version of ReactiveVariable. Current version is determined by calling ReactiveVariable.version(). Constructor Version(ReactiveVariable, long) can be used to specify different version number.

  Parameters:

  variable - ReactiveVariable that will have its version tracked by this object

  Throws:

  NullPointerException - if variable is null

Method Detail

• variable

  public ReactiveVariable<?> variable()

  Returns the ReactiveVariable this is a version of. This is the ReactiveVariable that was passed to the constructor.

  Returns:

  ReactiveVariable this object is a version of

• number

  public long number()

  Returns the version number of the version this object represents. This is the version number that was passed to the constructor or determined at construction time by calling ReactiveVariable.version().

  Returns:

  version number of the version this object represents

  See Also:

  ReactiveVariable.version()

• equals

  public boolean equals​(Object obj)

  Compares this version with another ReactiveVariable.Version. Two versions are equal if they the same variable() and number().

  Overrides:

  equals in class Object

  Parameters:

  obj - object to compare this version to

  Returns:

  true if obj represents the same version, false otherwise

• hashCode

  public int hashCode()

  Calculates hash code of this version. Hash code incorporates variable() identity and version number.

  Overrides:

  hashCode in class Object

  Returns:

  hash code of this ReactiveVariable.Version

• toString

  public String toString()

  Returns diagnostic string representation of this version. ReactiveVariable and its ReactiveValue is included in the result, but no reactive dependency is created by calling this method.

  Overrides:

  toString in class Object

  Returns:

  string representation of this version