Module: Enumpath::Operator

Defined in:
lib/enumpath/operator.rb,
lib/enumpath/operator/base.rb,
lib/enumpath/operator/child.rb,
lib/enumpath/operator/slice.rb,
lib/enumpath/operator/union.rb,
lib/enumpath/operator/wildcard.rb,
lib/enumpath/operator/filter_expression.rb,
lib/enumpath/operator/recursive_descent.rb,
lib/enumpath/operator/subscript_expression.rb

Overview

Namespace for classes that represent path expression operators

Defined Under Namespace

Classes: Base, Child, FilterExpression, RecursiveDescent, Slice, SubscriptExpression, Union, Wildcard

Constant Summary collapse

ROOT = 
'$'

Class Method Summary collapse

Class Method Details

.detect(operator, enum) ⇒ Object

Infer the type of operator and return an instance of its Enumpath::Operator subclass

Parameters:

  • operator (String) —

    the operator to infer type on

  • enum (Enumerable) —

    the enumerable to assist in detecting child operators

Returns:

  • an instance of a subclass of Enumpath::Operator based on what was detected, or nil if nothing was detected



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# File 'lib/enumpath/operator.rb', line 24

def detect(operator, enum)
  if Enumpath::Operator::Child.detect?(operator, enum)
    Enumpath.log('Child operator detected')
    Enumpath::Operator::Child.new(operator)
  elsif Enumpath::Operator::Wildcard.detect?(operator)
    Enumpath.log('Wildcard operator detected')
    Enumpath::Operator::Wildcard.new(operator)
  elsif Enumpath::Operator::RecursiveDescent.detect?(operator)
    Enumpath.log('Recursive Descent operator detected')
    Enumpath::Operator::RecursiveDescent.new(operator)
  elsif Enumpath::Operator::Union.detect?(operator)
    Enumpath.log('Union operator detected')
    Enumpath::Operator::Union.new(operator)
  elsif Enumpath::Operator::SubscriptExpression.detect?(operator)
    Enumpath.log('Subscript Expression operator detected')
    Enumpath::Operator::SubscriptExpression.new(operator)
  elsif Enumpath::Operator::FilterExpression.detect?(operator)
    Enumpath.log('Filter Expression operator detected')
    Enumpath::Operator::FilterExpression.new(operator)
  elsif Enumpath::Operator::Slice.detect?(operator)
    Enumpath.log('Slice operator detected')
    Enumpath::Operator::Slice.new(operator)
  else
    Enumpath.log('Not a valid operator for enum')
    nil
  end
end