Class: StateTransition::StateMachine
- Inherits:
-
Object
- Object
- StateTransition::StateMachine
- Defined in:
- lib/state_transition.rb
Instance Attribute Summary collapse
-
#current ⇒ Object
readonly
Returns the value of attribute current.
-
#define_actions ⇒ Object
readonly
Returns the value of attribute define_actions.
-
#state_list ⇒ Object
Returns the value of attribute state_list.
Instance Method Summary collapse
- #add_action(action) ⇒ Object
- #can_move?(state) ⇒ Boolean
- #create_callbacks(callbacks) ⇒ Object
- #create_edge(from, to) ⇒ Object
- #create_move_action(actions) ⇒ Object
- #have_state?(state) ⇒ Boolean
-
#initialize(data = nil) ⇒ StateMachine
constructor
A new instance of StateMachine.
- #initialize_copy(org) ⇒ Object
- #set_state(state) ⇒ Object
Constructor Details
#initialize(data = nil) ⇒ StateMachine
Returns a new instance of StateMachine.
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# File 'lib/state_transition.rb', line 8 def initialize(data = nil) @state_list = [] @state_graph = Hash.new{|hash, key| hash[key] = []} @callbacks = {} @define_actions = [] begin @current = data[:initial] rescue raise StandardError, "StateMachine: Not define first state." end set_state(data[:initial]) create_move_action(data[:actions] || []) create_callbacks(data[:callbacks] || []) end |
Instance Attribute Details
#current ⇒ Object (readonly)
Returns the value of attribute current.
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# File 'lib/state_transition.rb', line 5 def current @current end |
#define_actions ⇒ Object (readonly)
Returns the value of attribute define_actions.
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# File 'lib/state_transition.rb', line 5 def define_actions @define_actions end |
#state_list ⇒ Object
Returns the value of attribute state_list.
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# File 'lib/state_transition.rb', line 6 def state_list @state_list end |
Instance Method Details
#add_action(action) ⇒ Object
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# File 'lib/state_transition.rb', line 37 def add_action(action) create_move_action([action]) end |
#can_move?(state) ⇒ Boolean
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# File 'lib/state_transition.rb', line 76 def can_move?(state) @state_graph[@current].include?(state) end |
#create_callbacks(callbacks) ⇒ Object
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# File 'lib/state_transition.rb', line 70 def create_callbacks(callbacks) callbacks.each do |name, function| @callbacks[name] = function end end |
#create_edge(from, to) ⇒ Object
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# File 'lib/state_transition.rb', line 84 def create_edge(from, to) if from.kind_of?(Array) from.each do |state| state = state.to_sym @state_graph[state].push to unless @state_graph[state].include?(to) end else @state_graph[from].push to end end |
#create_move_action(actions) ⇒ Object
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# File 'lib/state_transition.rb', line 41 def create_move_action(actions) actions.each do |action| name = action[:name].to_sym from = action[:from] to = action[:to].to_sym @define_actions << name.to_sym set_state(from) set_state(to) create_edge(from, to) StateMachine.class_eval do define_method name do if can_move?(to) before_func = ("before_" + to.to_s).to_sym after_func = ("after_" + to.to_s).to_sym @callbacks[before_func].call if @callbacks[before_func] @current = to @callbacks[after_func].call if @callbacks[after_func] else raise StandardError, "Can not move from '#{@current}' to '#{to}'!" end end end end end |
#have_state?(state) ⇒ Boolean
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# File 'lib/state_transition.rb', line 33 def have_state?(state) @state_list.include?(state.to_sym) end |
#initialize_copy(org) ⇒ Object
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# File 'lib/state_transition.rb', line 26 def initialize_copy(org) @callbacks = @callbacks.dup @state_list = @state_list.dup @state_graph = @state_graph.dup @define_actions = @define_actions.dup end |
#set_state(state) ⇒ Object
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# File 'lib/state_transition.rb', line 80 def set_state(state) @state_list.push state.to_sym unless !state.respond_to?(:to_sym) || have_state?(state) end |