Module: CassandraMapper::Support::DescendantsTracker

Defined in:
lib/cassandra_mapper/support/descendants_tracker.rb

Overview

This module provides an internal implementation to track descendants which is faster than iterating through ObjectSpace.

Constant Summary collapse

@@descendants = 
Hash.new { |h, k| h[k] = [] }

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.clear ⇒ Object 



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# File 'lib/cassandra_mapper/support/descendants_tracker.rb', line 14

def self.clear
  @@descendants.each do |klass, descendants|
    if CassandraMapper::Support::Dependencies.autoloaded?(klass)
      @@descendants.delete(klass)
    else
      descendants.reject! { |v| CassandraMapper::Support::Dependencies.autoloaded?(v) }
    end
  end
end

.descendants ⇒ Object 



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# File 'lib/cassandra_mapper/support/descendants_tracker.rb', line 10

def self.descendants
  @@descendants
end

Instance Method Details

#descendants ⇒ Object 



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# File 'lib/cassandra_mapper/support/descendants_tracker.rb', line 33

def descendants
  @@descendants[self].inject([]) do |descendants, klass|
    descendants << klass
    descendants.concat klass.descendants
  end
end

#direct_descendants ⇒ Object 



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# File 'lib/cassandra_mapper/support/descendants_tracker.rb', line 29

def direct_descendants
  @@descendants[self]
end

#inherited(base) ⇒ Object 



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# File 'lib/cassandra_mapper/support/descendants_tracker.rb', line 24

def inherited(base)
  self.direct_descendants << base
  super
end