Module: JSONMapper::ClassMethods

Defined in:
lib/json_mapper.rb

Instance Method Summary collapse

Instance Method Details

#attributes ⇒ Object 



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# File 'lib/json_mapper.rb', line 38

def attributes
  @attributes[to_s] || []
end

#json_attribute(name, *args) ⇒ Object 



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# File 'lib/json_mapper.rb', line 16

def json_attribute(name, *args)

  source_attributes, type, options = extract_attribute_data(name, *args)
  attribute = Attribute.new(name, source_attributes, type, options)
  @attributes[to_s] ||= []
  @attributes[to_s] << attribute

  attr_accessor attribute.method_name.to_sym

end

#json_attributes(name, *args) ⇒ Object 



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# File 'lib/json_mapper.rb', line 27

def json_attributes(name, *args)

  source_attributes, type, options = extract_attribute_data(name, *args)
  attribute = AttributeList.new(name, source_attributes, type, options)
  @attributes[to_s] ||= []
  @attributes[to_s] << attribute

  attr_accessor attribute.method_name.to_sym

end

#json_data ⇒ Object 



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# File 'lib/json_mapper.rb', line 42

def json_data
  @json_data[to_s] || []
end

#parse(data, options = {}) ⇒ Object 



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# File 'lib/json_mapper.rb', line 46

def parse(data, options = {})

  return nil if data.nil? || data == ""
  json = get_json_structure(data, options)
  parse_json(json)

end

#parse_collection(data, options = {}) ⇒ Object 



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# File 'lib/json_mapper.rb', line 54

def parse_collection(data, options = {})

  return [] if data.nil? || data == ""
  json = get_json_structure(data, options)
  parse_json_collection(json)

end

#parse_json(json) ⇒ Object 



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# File 'lib/json_mapper.rb', line 62

def parse_json(json)

  # Set the JSON data for this instance
  @json_data[to_s] = json
  
  # Create a new instance of ourselves
  instance = new

  # Instantiate all AttributeList instances
  attributes.each do |attribute|
    if attribute.is_a?(AttributeList)
      instance.send("#{attribute.name}=", attribute.dup)
    end
  end

  # Traverse all defined attributes and assign data from the
  # JSON data structure
  attributes.each do |attribute|
    if is_mapped?(attribute, json)
      value = mapping_value(attribute, json)
      if attribute.is_a?(AttributeList)
        value = [ value ] unless value.is_a?(Array)
        value.each do |v|

          list_attribute = build_attribute(attribute.name, attribute.type, attribute.options)
          list_attribute_value = list_attribute.typecast(v)

          # Some times typecasting a value for a list will produce another list, in the case of
          # for instance DelimitedString. If this is the case, we concat that array to the list.
          # Otherwise, we just append the value.
          if list_attribute_value.is_a?(Array)
            instance.send("#{attribute.name}").concat(list_attribute_value)
          else
            instance.send("#{attribute.name}") << list_attribute_value
          end

        end
      else
        instance.send("#{attribute.name}=".to_sym, attribute.typecast(value))
      end
    end
  end

  instance

end

#parse_json_collection(json) ⇒ Object 



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# File 'lib/json_mapper.rb', line 109

def parse_json_collection(json)

  collection = []

  if json.is_a?(Array)
    json.each do |element|
      collection << parse_json(element)
    end
  end

  collection

end