Class: Aws::Templates::Utils::Parametrized::Getter::Path

Inherits:
Aws::Templates::Utils::Parametrized::Getter show all
Defined in:
lib/aws/templates/utils/parametrized/getter/path.rb

Overview

Lookup value in options by path

Looks up value from options attribute by specified path. The path can be either statically specified or a block can be provided. The block shouldn’t have parameters and should return an array containing path. The block will be executed in the instance context.

Example

class Piece
  include Aws::Templates::Utils::Parametrized

  parameter :param1, :getter => path(:a, :b)
end

i = Piece.new(:a => { :b => 3 })
i.param1 # => 3

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Aws::Templates::Utils::Parametrized::Getter

#get_wrapper, #to_proc

Constructor Details

#initialize(path) ⇒ Path

Returns a new instance of Path.



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# File 'lib/aws/templates/utils/parametrized/getter/path.rb', line 29

def initialize(path)
  unless path.respond_to?(:to_proc) || path.respond_to?(:to_a)
    raise ArgumentError.new(
      "Path can be either array or Proc: #{path.inspect}"
    )
  end

  @path = path
end

Instance Attribute Details

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/aws/templates/utils/parametrized/getter/path.rb', line 27

def path
  @path
end