Module: Parametric::Struct::ClassMethods

Defined in:
lib/parametric/struct.rb

Constant Summary collapse

PLURAL_END = 
/s$/.freeze

Instance Method Summary collapse

Instance Method Details

#__class_name(key) ⇒ Object 



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# File 'lib/parametric/struct.rb', line 107

def __class_name(key)
  key.to_s.split('_').map(&:capitalize).join.sub(PLURAL_END, '')
end

#build(attrs) ⇒ Object 



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# File 'lib/parametric/struct.rb', line 86

def build(attrs)
  attrs.each_with_object({}) do |(k, v), obj|
    obj[k] = wrap(k, v)
  end
end

#new!(attrs = {}) ⇒ Object

Raises:



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# File 'lib/parametric/struct.rb', line 57

def new!(attrs = {})
  st = new(attrs)
  raise InvalidStructError.new(st) unless st.valid?
  st
end

#parametric_after_define_schema(schema) ⇒ Object

this hook is called after schema definition in DSL module



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# File 'lib/parametric/struct.rb', line 64

def parametric_after_define_schema(schema)
  schema.fields.values.each do |field|
    if field.meta_data[:schema]
      if field.meta_data[:schema].is_a?(Parametric::Schema)
        klass = Class.new do
          include Struct
        end
        klass.schema = field.meta_data[:schema]
        self.const_set(__class_name(field.key), klass)
        klass.parametric_after_define_schema(field.meta_data[:schema])
      else
        self.const_set(__class_name(field.key), field.meta_data[:schema])
      end
    end
    self.class_eval <<-RUBY, __FILE__, __LINE__ + 1
      def #{field.key}
        _graph[:#{field.key}]
      end
    RUBY
  end
end

#wrap(key, value) ⇒ Object 



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# File 'lib/parametric/struct.rb', line 92

def wrap(key, value)
  case value
  when Hash
    # find constructor for field
    cons = self.const_get(__class_name(key))
    cons ? cons.new(value) : value.freeze
  when Array
    value.map{|v| wrap(key, v) }.freeze
  else
    value.freeze
  end
end