class StateJacket::StateTransitionSystem
Attributes
transitions[R]
Public Class Methods
new()
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# File lib/state_jacket/state_transition_system.rb, line 3 def initialize @transitions = {} end
Public Instance Methods
add(state)
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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)
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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?()
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# File lib/state_jacket/state_transition_system.rb, line 28 def is_locked? !!@locked end
is_state?(state)
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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)
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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)
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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()
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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()
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# File lib/state_jacket/state_transition_system.rb, line 40 def states transitions.keys end
terminators()
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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()
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# File lib/state_jacket/state_transition_system.rb, line 7 def to_h transitions.dup end
transitioners()
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# File lib/state_jacket/state_transition_system.rb, line 44 def transitioners transitions.keys.select { |state| transitions[state] != nil } end
Private Instance Methods
make_states(values)
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# File lib/state_jacket/state_transition_system.rb, line 68 def make_states(values) values = [values.to_s] unless values.respond_to?(:map) values = values.map(&:to_s) values.each { |value| transitions[value] ||= nil } unless transitions.frozen? values end