Class: StateJacket::StateTransitionSystem
- Inherits:
-
Object
- Object
- StateJacket::StateTransitionSystem
- Defined in:
- lib/state_jacket/state_transition_system.rb
Instance Method Summary collapse
- #add(state) ⇒ Object
- #can_transition?(from_to) ⇒ Boolean
-
#initialize ⇒ StateTransitionSystem
constructor
A new instance of StateTransitionSystem.
- #is_locked? ⇒ Boolean
- #is_state?(state) ⇒ Boolean
- #is_terminator?(state) ⇒ Boolean
- #is_transitioner?(state) ⇒ Boolean
- #lock ⇒ Object
- #states ⇒ Object
- #terminators ⇒ Object
- #to_h ⇒ Object
- #transitioners ⇒ Object
Constructor Details
#initialize ⇒ StateTransitionSystem
Returns a new instance of StateTransitionSystem.
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# File 'lib/state_jacket/state_transition_system.rb', line 3 def initialize @transitions = {} end |
Instance Method Details
#add(state) ⇒ Object
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# File 'lib/state_jacket/state_transition_system.rb', line 11 def add(state) raise "states cannot be added after locking" if is_locked? if state.is_a?(Hash) from = state.keys.first.to_s transitions[from] = make_states(state.values.first) else transitions[state.to_s] = nil end end |
#can_transition?(from_to) ⇒ Boolean
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# File 'lib/state_jacket/state_transition_system.rb', line 32 def can_transition?(from_to) raise ArgumentError.new("from_to should contain a single transition") unless from_to.size == 1 from = from_to.keys.first.to_s to = make_states(from_to.values.first) allowed_states = transitions[from] || [] (to & allowed_states).length == to.length end |
#is_locked? ⇒ Boolean
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# File 'lib/state_jacket/state_transition_system.rb', line 28 def is_locked? !!@locked end |
#is_state?(state) ⇒ Boolean
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# File 'lib/state_jacket/state_transition_system.rb', line 52 def is_state?(state) transitions.keys.include?(state.to_s) end |
#is_terminator?(state) ⇒ Boolean
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# File 'lib/state_jacket/state_transition_system.rb', line 56 def is_terminator?(state) terminators.include?(state.to_s) end |
#is_transitioner?(state) ⇒ Boolean
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# File 'lib/state_jacket/state_transition_system.rb', line 60 def is_transitioner?(state) transitioners.include?(state.to_s) end |
#lock ⇒ Object
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# File 'lib/state_jacket/state_transition_system.rb', line 21 def lock return true if is_locked? transitions.freeze transitions.values.each { |value| value.freeze unless value.nil? } @locked = true end |
#states ⇒ Object
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# File 'lib/state_jacket/state_transition_system.rb', line 40 def states transitions.keys end |
#terminators ⇒ Object
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# File 'lib/state_jacket/state_transition_system.rb', line 48 def terminators transitions.keys.select { |state| transitions[state] == nil } end |
#to_h ⇒ Object
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# File 'lib/state_jacket/state_transition_system.rb', line 7 def to_h transitions.dup end |
#transitioners ⇒ Object
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# File 'lib/state_jacket/state_transition_system.rb', line 44 def transitioners transitions.keys.select { |state| transitions[state] != nil } end |