class StateMachine

Public Class Methods

new() click to toggle source

A silly little state machine.

# File lib/puppet/type/zone.rb, line 11
def initialize
  @state = {}
  @sequence = []
  @state_aliases = {}
  @default = nil
end

Public Instance Methods

alias_state(state, salias) click to toggle source

# File lib/puppet/type/zone.rb, line 24
def alias_state(state, salias)
  @state_aliases[state] = salias
end

cmp?(a,b) click to toggle source

# File lib/puppet/type/zone.rb, line 46
def cmp?(a,b)
  index(a) < index(b)
end

index(state) click to toggle source

# File lib/puppet/type/zone.rb, line 32
def index(state)
  @sequence.index(name(state))
end

insert_state(name, transitions) click to toggle source

The order of calling #insert_state is important

# File lib/puppet/type/zone.rb, line 19
def insert_state(name, transitions)
  @sequence << name
  @state[name] = transitions
end

name(n) click to toggle source

# File lib/puppet/type/zone.rb, line 28
def name(n)
  @state_aliases[n.to_sym] || n.to_sym
end

sequence(fs, ss) click to toggle source

return all states between fs and ss excluding fs

# File lib/puppet/type/zone.rb, line 37
def sequence(fs, ss)
  fi = index(fs)
  si= index(ss)
  (if fi > si
    then @sequence[si .. fi].map{|i| @state[i]}.reverse
    else @sequence[fi .. si].map{|i| @state[i]}
  end)[1..-1]
end