Class: JMESPath::Nodes::KeysFunction Private

Inherits:
Function show all
Defined in:
lib/jmespath/nodes/function.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Constant Summary

Constants inherited from Function

Function::FUNCTIONS

Instance Method Summary collapse

Methods inherited from Function

create, #initialize, #optimize, #visit

Methods inherited from Node

#chains_with?, #hash_like?, #optimize, #visit

Constructor Details

This class inherits a constructor from JMESPath::Nodes::Function

Instance Method Details

#call(args) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
 
# File 'lib/jmespath/nodes/function.rb', line 253

def call(args)
  if args.count == 1
    value = args.first
    if hash_like?(value)
      case value
      when Hash then value.keys.map(&:to_s)
      when Struct then value.members.map(&:to_s)
      else raise NotImplementedError
      end
    else
      return maybe_raise Errors::InvalidTypeError, "function keys() expects a hash"
    end
  else
    return maybe_raise Errors::InvalidArityError, "function keys() expects one argument"
  end
end