Class: CfnDsl::JSONable

Inherits:

Object

• Object
• CfnDsl::JSONable

Extended by:

Functions

Includes:

Functions, RefCheck

Defined in:

lib/cfndsl/jsonable.rb

Overview

This is the base class for just about everything useful in the DSL. It knows how to turn DSL Objects into the corresponding json, and it lets you create new built in function objects from inside the context of a dsl object.

Direct Known Subclasses

AWS::Types::Type, ConditionDefinition, CreationPolicyDefinition, Fn, GenerateTypes::Type, MappingDefinition, OS::Types::Type, OrchestrationTemplate, OutputDefinition, ParameterDefinition, PropertyDefinition, RefDefinition, ResourceDefinition, UpdatePolicyDefinition

Class Method Summary

• .external_parameters ⇒ Object

Instance Method Summary

• #as_json(_options = {}) ⇒ Object

  Use instance variables to build a json object.

• #declare(&block) ⇒ Object
• #external_parameters ⇒ Object
• #ref_children ⇒ Object
• #to_json(*a) ⇒ Object

Methods included from Functions

FnAnd, FnBase64, FnEquals, FnFindInMap, FnFormat, FnGetAZs, FnGetAtt, FnIf, FnImportValue, FnJoin, FnNot, FnOr, FnSelect, FnSub, Ref

Methods included from RefCheck

#build_references

Class Method Details

.external_parameters ⇒ Object

# File 'lib/cfndsl/jsonable.rb', line 155

def self.external_parameters
  CfnDsl::ExternalParameters.current
end

Instance Method Details

#as_json(_options = {}) ⇒ Object

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.

# File 'lib/cfndsl/jsonable.rb', line 167

def as_json(_options = {})
  hash = {}
  instance_variables.each do |var|
    name = var[1..-1]

    if name =~ /^__/
      # if a variable starts with double underscore, strip one off
      name = name[1..-1]
    elsif name =~ /^_/
      # Hide variables that start with single underscore
      name = nil
    end

    hash[name] = instance_variable_get(var) if name
  end
  hash
end

#declare(&block) ⇒ Object

# File 'lib/cfndsl/jsonable.rb', line 193

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

#external_parameters ⇒ Object

# File 'lib/cfndsl/jsonable.rb', line 159

def external_parameters
  self.class.external_parameters
end

#ref_children ⇒ Object

# File 'lib/cfndsl/jsonable.rb', line 189

def ref_children
  instance_variables.map { |var| instance_variable_get(var) }
end

#to_json(*a) ⇒ Object

# File 'lib/cfndsl/jsonable.rb', line 185

def to_json(*a)
  as_json.to_json(*a)
end