Class: CfnDsl::JSONable

Inherits:
Object
  • Object
show all
Extended by:
Functions
Includes:
Functions, RefCheck
Defined in:
lib/cfndsl/JSONable.rb

Instance Method Summary collapse

Methods included from Functions

FnBase64, FnFindInMap, FnFormat, FnGetAZs, FnGetAtt, FnJoin, Ref

Methods included from RefCheck

#references

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args, &block) ⇒ Object 



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# File 'lib/cfndsl/JSONable.rb', line 137

def method_missing(meth,*args,&block) 
  if(args) then
    arg = "(" + args.inspect[1..-2] + ")"
  else 
    arg = ""
  end
  CfnDsl::Errors.error( "Undefined symbol: #{meth}#{arg}", 1 )
end

Instance Method Details

#declare(&block) ⇒ Object 



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# File 'lib/cfndsl/JSONable.rb', line 133

def declare(&block)
  self.instance_eval &block if block_given?
end

#ref_children ⇒ Object 



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# File 'lib/cfndsl/JSONable.rb', line 129

def ref_children
  return self.instance_variables.map { |var| self.instance_variable_get var }
end

#to_json(*a) ⇒ Object 



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# File 'lib/cfndsl/JSONable.rb', line 106

def to_json(*a)
  ##
  # Use instance variables to build a json object. Instance
  # variables that begin with a single underscore are elided.
  # Instance variables that begin with two underscores have one of
  # them removed.
  hash = {}
  self.instance_variables.each do |var|
    name = var[1..-1]
    
    if( name =~ /^__/ ) then
      # if a variable starts with double underscore, strip one off
      name = name[1..-1]
    elsif( name =~ /^_/ ) then
      # Hide variables that start with single underscore
      name = nil
    end
      
    hash[name] = self.instance_variable_get var if name
  end
  hash.to_json(*a)
end