Class: Transitions::StateTransition
- Inherits:
-
Object
- Object
- Transitions::StateTransition
- Defined in:
- lib/transitions/state_transition.rb
Instance Attribute Summary collapse
-
#from ⇒ Object
readonly
Returns the value of attribute from.
-
#options ⇒ Object
readonly
Returns the value of attribute options.
-
#to ⇒ Object
readonly
Returns the value of attribute to.
Instance Method Summary collapse
- #==(obj) ⇒ Object
- #execute(obj, *args) ⇒ Object
- #from?(value) ⇒ Boolean
-
#initialize(opts) ⇒ StateTransition
constructor
A new instance of StateTransition.
- #perform(obj) ⇒ Object
Constructor Details
#initialize(opts) ⇒ StateTransition
Returns a new instance of StateTransition.
27 28 29 30 |
# File 'lib/transitions/state_transition.rb', line 27 def initialize(opts) @from, @to, @guard, @on_transition = opts[:from], opts[:to], opts[:guard], opts[:on_transition] @options = opts end |
Instance Attribute Details
#from ⇒ Object (readonly)
Returns the value of attribute from.
25 26 27 |
# File 'lib/transitions/state_transition.rb', line 25 def from @from end |
#options ⇒ Object (readonly)
Returns the value of attribute options.
25 26 27 |
# File 'lib/transitions/state_transition.rb', line 25 def @options end |
#to ⇒ Object (readonly)
Returns the value of attribute to.
25 26 27 |
# File 'lib/transitions/state_transition.rb', line 25 def to @to end |
Instance Method Details
#==(obj) ⇒ Object
61 62 63 |
# File 'lib/transitions/state_transition.rb', line 61 def ==(obj) @from == obj.from && @to == obj.to end |
#execute(obj, *args) ⇒ Object
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 |
# File 'lib/transitions/state_transition.rb', line 43 def execute(obj, *args) case @on_transition when Symbol, String obj.send(@on_transition, *args) when Proc @on_transition.call(obj, *args) when Array @on_transition.each do |callback| # Yes, we're passing always the same parameters for each callback in here. # We should probably drop args altogether in case we get an array. obj.send(callback, *args) end else # TODO We probably should check for this in the constructor and not that late. raise ArgumentError, "You can only pass a Symbol, a String, a Proc or an Array to 'on_transition' - got #{@on_transition.class}." unless @on_transition.nil? end end |
#from?(value) ⇒ Boolean
65 66 67 |
# File 'lib/transitions/state_transition.rb', line 65 def from?(value) @from == value end |
#perform(obj) ⇒ Object
32 33 34 35 36 37 38 39 40 41 |
# File 'lib/transitions/state_transition.rb', line 32 def perform(obj) case @guard when Symbol, String obj.send(@guard) when Proc @guard.call(obj) else true end end |