Class: CQL::MapReduce

Inherits:
Object
  • Object
show all
Extended by:
Dsl
Defined in:
lib/cql/map_reduce.rb

Overview

Not a part of the public API. Subject to change at any time.

Class Method Summary collapse

Methods included from Dsl

as, eq, from, gt, gte, lc, line, lt, lte, method_missing, name, sc, select, soc, ssoc, tags, tc, transform, with, without

Class Method Details

.gather_objects(current_object, target_classes, filters) ⇒ Object

Recursively gathers all models that match the given targets and filters



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# File 'lib/cql/map_reduce.rb', line 16

def self.gather_objects(current_object, target_classes, filters)
  gathered_objects = Array.new.tap { |gathered_objects| collect_all_in(target_classes, current_object, gathered_objects) }

  if filters
    filters.each do |filter|
      negate = filter[:negate]
      filter = filter[:filter]

      # Non-targeted filter, will apply to all objects
      if filter.is_a?(Proc)
        gathered_objects = filter_with_proc(gathered_objects, filter, negate)

        # Targeted filter, will only apply to certain objects
      elsif filter.is_a?(Hash)
        filter.keys.each do |filtered_class|
          clazz = determine_class(filtered_class)

          gathered_objects = gathered_objects.select do |object|

            # A class that is targeted by the filter, so proceed with determination
            if object.is_a?(clazz)

              # Block filter
              if filter[filtered_class].is_a?(Proc)
                filter[filtered_class].call(object) && !negate

                # Must be a predefined filter otherwise
              else
                !filter_with_predefined([object], filter[filtered_class], negate).empty?
              end

              # Not a class that is targeted by the filter, so include it
            else
              true
            end
          end
        end

        # Must be a predefined filter otherwise
      else
        gathered_objects = filter_with_predefined(gathered_objects, filter, negate)
      end
    end
  end

  gathered_objects
end