Class: GraphQL::Language::Nodes::AbstractNode

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/language/nodes.rb

Overview

AbstractNode creates classes who:

  • require their keyword arguments, throw ArgumentError if they don’t match

  • expose accessors for keyword arguments

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ AbstractNode

Returns a new instance of AbstractNode.

Parameters:

  • options (Hash) (defaults to: {}) —

    Must contain all attributes defined by required_attrs, may also include ‘position_source`



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# File 'lib/graphql/language/nodes.rb', line 11

def initialize(options={})
  if options.key?(:position_source)
    position_source = options.delete(:position_source)
    @line, @col = position_source.line_and_column
  elsif options.key?(:line)
    @line = options.delete(:line)
    @col = options.delete(:col)
  end

  initialize_node(options)
end

Instance Attribute Details

#col ⇒ Object

Returns the value of attribute col.



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# File 'lib/graphql/language/nodes.rb', line 8

def col
  @col
end

#line ⇒ Object

Returns the value of attribute line.



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# File 'lib/graphql/language/nodes.rb', line 8

def line
  @line
end

Class Method Details

.child_attributes(*attr_names) ⇒ Object 



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# File 'lib/graphql/language/nodes.rb', line 58

def child_attributes(*attr_names)
  @child_attributes ||= []
  @child_attributes += attr_names
end

.inherited(subclass) ⇒ Object 



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# File 'lib/graphql/language/nodes.rb', line 48

def inherited(subclass)
  subclass.scalar_attributes(*@scalar_attributes)
  subclass.child_attributes(*@child_attributes)
end

.scalar_attributes(*attr_names) ⇒ Object 



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# File 'lib/graphql/language/nodes.rb', line 53

def scalar_attributes(*attr_names)
  @scalar_attributes ||= []
  @scalar_attributes += attr_names
end

Instance Method Details

#children ⇒ GraphQL::Language::Nodes::AbstractNode

Returns all nodes in the tree below this one.

Returns:



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# File 'lib/graphql/language/nodes.rb', line 36

def children
  self.class.child_attributes
    .map { |attr_name| public_send(attr_name) }
    .flatten
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/language/nodes.rb', line 28

def eql?(other)
  return true if equal?(other)
  other.is_a?(self.class) &&
    other.scalars.eql?(self.scalars) &&
    other.children.eql?(self.children)
end

#initialize_node(options = {}) ⇒ Object

This is called with node-specific options

Raises:

  • (NotImplementedError) 


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# File 'lib/graphql/language/nodes.rb', line 24

def initialize_node(options={})
  raise NotImplementedError
end

#position ⇒ Object 



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# File 'lib/graphql/language/nodes.rb', line 64

def position
  [line, col]
end

#scalars ⇒ Object 



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# File 'lib/graphql/language/nodes.rb', line 42

def scalars
  self.class.scalar_attributes
    .map { |attr_name| public_send(attr_name) }
end

#to_query_string ⇒ Object 



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# File 'lib/graphql/language/nodes.rb', line 68

def to_query_string
  Generation.generate(self)
end