Class: RbYAML::BaseRepresenter

Inherits:
Object
  • Object
show all
Defined in:
lib/rbyaml/representer.rb

Direct Known Subclasses

SafeRepresenter

Constant Summary collapse

CLASSOBJ_TYPE = 
Class
INSTANCE_TYPE = 
Object
FUNCTION_TYPE = 
Method
BUILTIN_FUNCTION_TYPE = 
Method
MODULE_TYPE = 
Module
@@yaml_representers = 
{}
@@yaml_multi_representers = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(serializer, default_style = nil, default_flow_style = nil) ⇒ BaseRepresenter

Returns a new instance of BaseRepresenter.



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# File 'lib/rbyaml/representer.rb', line 15

def initialize(serializer, default_style=nil, default_flow_style=nil)
  @serializer = serializer
  @default_style = default_style
  @default_flow_style = default_flow_style
  @represented_objects = {}
end

Class Method Details

.add_multi_representer(data_type, representer) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 91

def self.add_multi_representer(data_type, representer)
  @@yaml_multi_representers[data_type] = representer
end

.add_representer(data_type, representer) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 87

def self.add_representer(data_type, representer)
  @@yaml_representers[data_type] = representer
end

Instance Method Details

#get_classobj_bases(cls) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 34

def get_classobj_bases(cls)
  [cls] + cls.ancestors
end

#ignore_aliases(data) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 136

def ignore_aliases(data)
  false
end

#represent(data) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 22

def represent(data)
  node = represent_data(data)
  @serializer.serialize(node)
  represented_objects = {}
end

#represent_data(data) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 38

def represent_data(data)
  if ignore_aliases(data)
    alias_key = nil
  else
    alias_key = data.object_id
  end
  
  if !alias_key.nil?
    if @represented_objects.include?(alias_key)
      node = @represented_objects[alias_key]
      raise RepresenterError.new("recursive objects are not allowed: #{data}") if node.nil?
      return node
    end
    @represented_objects[alias_key] = nil
  end
  
  data_types = data.class.ancestors
  data_types = get_classobj_bases(data.class) + data_types if INSTANCE_TYPE === data

  if @@yaml_representers.include?(data_types[0])
    node = send(@@yaml_representers[data_types[0]],data)
  else
    rerun = true
    for data_type in data_types
      if @@yaml_multi_representers.include?(data_type)
        node = send(@@yaml_multi_representers[data_type],data)
        rerun = false
        break
      elsif @@yaml_representers.include?(data_type)
        node = send(@@yaml_representers[data_type],data)
        rerun = false
        break
      end
    end
    if rerun
      if @@yaml_multi_representers.include?(nil)
        node = send(@@yaml_multi_representers[nil],data)
      elsif @@yaml_representers.include?(nil)
        node = send(@@yaml_representers[nil],data)
      else
        node = ScalarNode.new(nil, data)
      end
    end
  end
    
  @represented_objects[alias_key] = node if !alias_key.nil?
  node
end

#represent_mapping(tag, mapping, flow_style = nil) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 111

def represent_mapping(tag, mapping, flow_style=nil)
  best_style = true
  if mapping.respond_to?(:keys)
    value = {}
    for item_key,item_value in mapping
      node_key = represent_data(item_key)
      node_value = represent_data(item_value)
      best_style = false if !node_key.__is_scalar && !node_key.flow_style
      best_style = false if !node_value.__is_scalar && !node_value.flow_style
      value[node_key] = node_value
    end
  else
    value = []
    for item_key, item_value in mapping
      node_key = represent_data(item_key)
      node_value = represent_data(item_value)
      best_style = false if !node_key.__is_scalar && !node_key.flow_style
      best_style = false if !node_value.__is_scalar && !node_value.flow_style
      value << [node_key, node_value]
    end
  end
  flow_style ||= (@flow_default_style || best_style)
  MappingNode.new(tag, value, flow_style)
end

#represent_scalar(tag, value, style = nil) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 95

def represent_scalar(tag, value, style=nil)
  style ||= @default_style
  ScalarNode.new(tag, value, style)
end

#represent_sequence(tag, sequence, flow_style = nil) ⇒ Object 



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# File 'lib/rbyaml/representer.rb', line 100

def represent_sequence(tag, sequence, flow_style=nil)
  best_style = true
  value = sequence.map {|item| 
    node_item = represent_data(item)
    best_style = false if !node_item.__is_scalar && !node_item.flow_style
    node_item
  }
  flow_style ||= (@flow_default_style || best_style)
  SequenceNode.new(tag, value, flow_style)
end