Class: Rubber::Configuration::Environment::HashValueProxy

Inherits:
Hash
  • Object
show all
Includes:
MonitorMixin
Defined in:
lib/rubber/environment.rb

Direct Known Subclasses

BoundEnv

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(global, receiver) ⇒ HashValueProxy

Returns a new instance of HashValueProxy.



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# File 'lib/rubber/environment.rb', line 143

def initialize(global, receiver)
  @global = global
  @cache = {}
  super()
  replace(receiver)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_id) ⇒ Object 



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# File 'lib/rubber/environment.rb', line 182

def method_missing(method_id)
  self[method_id.id2name]
end

Instance Attribute Details

#cache ⇒ Object (readonly)

Returns the value of attribute cache.



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# File 'lib/rubber/environment.rb', line 141

def cache
  @cache
end

#global ⇒ Object (readonly)

Returns the value of attribute global.



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# File 'lib/rubber/environment.rb', line 141

def global
  @global
end

Instance Method Details

#[](name) ⇒ Object 



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# File 'lib/rubber/environment.rb', line 158

def [](name)
  unless cache.has_key?(name)
    synchronize do
      value = super(name)
      value = global[name] if global && !value
      cache[name] = expand(value)
    end
  end

  cache[name]
end

#each ⇒ Object 



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# File 'lib/rubber/environment.rb', line 170

def each
  each_key do |key|
    yield key, self[key]
  end
end

#expand(value) ⇒ Object 



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# File 'lib/rubber/environment.rb', line 197

def expand(value)
  val = case value
    when Hash
      HashValueProxy.new(global || self, value)
    when String
      expand_string(value)
    when Enumerable
      value.collect {|v| expand(v) }
    else
      value
  end

  val
end

#expand_string(val) ⇒ Object 



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# File 'lib/rubber/environment.rb', line 186

def expand_string(val)
  while val =~ /\#\{[^\}]+\}/
    val = eval('%Q{' + val + '}', binding, __FILE__)
  end

  val = true if val =="true"
  val = false if val == "false"

  val
end

#known_roles ⇒ Object 



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# File 'lib/rubber/environment.rb', line 154

def known_roles
  Rubber::Configuration.get_configuration(Rubber.env).environment.known_roles
end

#rubber_instances ⇒ Object 



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# File 'lib/rubber/environment.rb', line 150

def rubber_instances
  Rubber.instances
end

#to_a ⇒ Object

allows expansion when to_a gets called on hash proxy, e.g. when wrapping a var in Array() to ensure error free iteration for possible null values



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# File 'lib/rubber/environment.rb', line 178

def to_a
  self.collect {|k, v| [k, v]}
end