Module: JMESPath::Nodes::CompareBy Private

Includes:
TypeChecker
Included in:
MaxByFunction, MinByFunction
Defined in:
lib/jmespath/nodes/function.rb

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

Constant Summary

Constants included from TypeChecker

TypeChecker::ARRAY_TYPE, TypeChecker::BOOLEAN_TYPE, TypeChecker::EXPRESSION_TYPE, TypeChecker::NULL_TYPE, TypeChecker::NUMBER_TYPE, TypeChecker::OBJECT_TYPE, TypeChecker::STRING_TYPE, TypeChecker::TYPE_NAMES

Instance Method Summary collapse

Methods included from TypeChecker

#get_type

Instance Method Details

#compare_by(mode, *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. 



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# File 'lib/jmespath/nodes/function.rb', line 506

def compare_by(mode, *args)
  if args.count == 2
    values = args[0]
    expression = args[1]
    if get_type(values) == ARRAY_TYPE && get_type(expression) == EXPRESSION_TYPE
      values = values.to_ary
      type = get_type(expression.eval(values.first))
      if type != NUMBER_TYPE && type != STRING_TYPE
        msg = "function #{mode}() expects values to be strings or numbers"
        return maybe_raise Errors::InvalidTypeError, msg
      end
      values.send(mode) do |entry|
        value = expression.eval(entry)
        value_type = get_type(value)
        if value_type != type
          msg = String.new("function #{mode}() encountered a type mismatch in ")
          msg << "sequence: #{type}, #{value_type}"
          return maybe_raise Errors::InvalidTypeError, msg
        end
        value
      end
    else
      msg = "function #{mode}() expects an array and an expression"
      return maybe_raise Errors::InvalidTypeError, msg
    end
  else
    msg = "function #{mode}() expects two arguments"
    return maybe_raise Errors::InvalidArityError, msg
  end
end