Module: Gibbler::Hash

Includes:
Object
Included in:
Hash
Defined in:
lib/gibbler.rb

Overview

Creates a digest based on:

  • parse each key, value pair into an Array containing keys: ‘CLASS:KEY:VALUE.__gibbler`

    • The gibbler method is called on each element so if it is a Hash or Array etc it will be parsed recursively according to the gibbler method for that class type.

  • Digest the Array of digests

  • Return the digest for ‘class:length:value` where:

    • “class” is equal to the current object class (e.g. Hash).

    • “length” is the size of the Array of digests (which should equal the number of keys in the original Hash object).

    • “value” is the Array of digests joined with a colon (“:”).

This method can be used by any class with a ‘keys` method.

class MyOrderedHash
  include Gibbler::Hash
end

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Object

#digest_cache, #freeze, #gibbled?, #gibbler, #gibbler_debug, #gibbler_fields, gibbler_fields

Class Method Details

.included(obj) ⇒ Object 



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# File 'lib/gibbler.rb', line 425

def self.included(obj)
  obj.extend Attic
  obj.attic :gibbler_cache
end

Instance Method Details

#__gibbler(digest_type = nil) ⇒ Object

Creates a digest for the current state of self.



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# File 'lib/gibbler.rb', line 431

def __gibbler(digest_type=nil)
  klass = self.class
  d = self.keys.sort { |a,b| a.inspect <=> b.inspect }
  d.collect! do |name|
    value = self[name]
    unless value.respond_to? :__gibbler
      gibbler_debug klass, :skipping, name
      next
    end
    '%s:%s:%s' % [value.class, name, value.__gibbler(digest_type)]
  end
  d = d.join(Gibbler.delimiter).__gibbler(digest_type)
  a = Gibbler.digest '%s:%s:%s' % [klass, d.size, d], digest_type
  gibbler_debug klass, a, [klass, d.size, d]
  a
end