Class: Tamiyo::YamlHelper::EventStream

Inherits:
Object
  • Object
show all
Defined in:
lib/tamiyo/yaml/yaml_helper.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(queue) ⇒ EventStream

Returns a new instance of EventStream.



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 97

def initialize(queue)
  @queue = queue
end

Instance Attribute Details

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 94

def type
  @type
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 95

def value
  @value
end

Instance Method Details

#assume_end ⇒ Object

Raises:

  • (StopIteration) 


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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 146

def assume_end
  self.next
  raise StopIteration, "Assumed end but found #{@type}" unless @type == :end
end

#assume_mapping ⇒ Object

Raises:

  • (StopIteration) 


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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 141

def assume_mapping
  self.next
  raise StopIteration, "Assumed map but found #{@type}" unless @type == :map
end

#assume_scalar ⇒ Object

Raises:

  • (StopIteration) 


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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 130

def assume_scalar
  self.next
  raise StopIteration, "Assumed scalar but found #{@type}" unless @type == :scalar
  @value
end

#assume_sequence ⇒ Object

Raises:

  • (StopIteration) 


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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 136

def assume_sequence
  self.next
  raise StopIteration, "Assumed seq but found #{@type}" unless @type == :seq
end

#each_within_mapping ⇒ Object 



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 109

def each_within_mapping
  assume_mapping
  until peak_next_is_end
    yield
  end
  assume_end
end

#each_within_sequence ⇒ Object 



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 101

def each_within_sequence
  assume_sequence
  until peak_next_is_end
    yield
  end
  assume_end
end

#next ⇒ Object 



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 156

def next
  event = @peak || @queue.pop
  @peak = nil
  @type, @value = event
  event
end

#on_keys(cases) ⇒ Object

Raises:

  • (StopIteration) 


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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 124

def on_keys(cases)
  value = assume_scalar
  raise StopIteration, "No case for key #{value} available" unless cases.include? value
  cases[value][]
end

#on_types(cases) ⇒ Object

Raises:

  • (StopIteration) 


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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 117

def on_types(cases)
  type, _ = peak
  raise StopIteration, "No case for type #{type} available" unless cases.include? type
  self.next if type == :scalar
  cases[type][]
end

#peak ⇒ Object 



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 163

def peak
  @peak ||= @queue.pop
end

#peak_next_is_end ⇒ Object 



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# File 'lib/tamiyo/yaml/yaml_helper.rb', line 151

def peak_next_is_end
  type, _ = peak
  type == :end
end