Class: Trafaret::Key

Inherits:
Object
  • Object
show all
Defined in:
lib/trafaret/base.rb

Instance Method Summary collapse

Constructor Details

#initialize(name, validator, options = {}, &blk) ⇒ Key

Returns a new instance of Key.



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# File 'lib/trafaret/base.rb', line 3

def initialize(name, validator, options = {}, &blk)
  @name = name
  @sname = name.to_s

  @optional = options.delete(:optional)
  @default = options.delete(:default)
  @to_name = options.delete(:to_name) || name
  @options = options

  set_validator(validator, options, &blk)
end

Instance Method Details

#call(data) ⇒ Object 



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# File 'lib/trafaret/base.rb', line 32

def call(data)
  value = get(data)
  if value == NoValue
    if @default
      value = @default
    elsif @optional
      return
    else
      return [@name, Trafaret::Error.new("#{@name} is required")]
    end
  end
  value = @validator.call(value, &@blk)
  if value.is_a? Trafaret::Error
    [@name, value]
  else
    [@to_name, value]
  end
end

#get(obj) ⇒ Object 



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# File 'lib/trafaret/base.rb', line 21

def get(obj)
  # data = obj.send(@name) if data.respond_to? @name
  if obj.include? @name
    obj[@name]
  elsif obj.include? @sname
    obj[@sname]
  else
    NoValue
  end
end

#set_validator(validator, options = {}, &blk) ⇒ Object 



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# File 'lib/trafaret/base.rb', line 15

def set_validator(validator, options = {}, &blk)
  validator = Trafaret.get_validator(validator)
  @validator = if validator.is_a?(Class) then validator.new(options) else validator end
  @validator.add(blk) if blk
end