Class: EntityStorage::Storage

Inherits:
Object
  • Object
show all
Defined in:
lib/entity_storage.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(defaults = {}) ⇒ Storage

Checks for the existence of the necessary Entities table… if not here, creates it.



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# File 'lib/entity_storage.rb', line 18

def initialize(defaults={})
  self.defaults = defaults
  if !ActiveRecord::Base.connection.table_exists?('entity_storage')
puts "Creating entity table..."
AddEntitiesTable.create
    self['ENTITY_STORAGE_MASTER_VERSION']='2.1.2'
			elsif self['ENTITY_STORAGE_MASTER_VERSION'].nil? || self['ENTITY_STORAGE_MASTER_VERSION']!='2.1.2'
    self['ENTITY_STORAGE_MASTER_VERSION']='2.1.2'
    ActiveRecord::Base.connection.execute("show columns from entity_storage").each {|p|
      if p[0] == "value" && p[1] != "blob"
        puts "Migrating to new 2.1.x binary format..."
        ActiveRecord::Base.connection.execute("alter table entity_storage modify value blob")
        break
      end
    }
  end

end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(*args) ⇒ Object

Allows EntityStorage to be accessed via EntityStorage.whatever.



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# File 'lib/entity_storage.rb', line 64

def method_missing(*args)
			if args.length == 1
self[args[0]]
			elsif args.length == 2 and args[0].to_s =~ /^(.*)=$/
self[$1.intern] = args[1]
			else
super
			end
end

Instance Attribute Details

#defaults ⇒ Object

Returns the value of attribute defaults.



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# File 'lib/entity_storage.rb', line 15

def defaults
  @defaults
end

Instance Method Details

#[](index) ⇒ Object

Read a value.



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# File 'lib/entity_storage.rb', line 38

def [](index)
  Entity.get_value(index,@defaults[index.to_s])
end

#[]=(index, value) ⇒ Object

Write a value.



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# File 'lib/entity_storage.rb', line 43

def []=(index,value)
  Entity.set_value(index,value)
end

#default(index) ⇒ Object

Returns the default value of a key contained in DEFAULT_KEYS global constant. Does not change the stored value. Use default! to reset the value.



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# File 'lib/entity_storage.rb', line 54

def default(index)
  @defaults[index.to_s]
end

#default!(index) ⇒ Object

Resets the default value of a key contained in DEFAULT_KEYS global constant and returns the value.



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# File 'lib/entity_storage.rb', line 59

def default!(index)
  Entity.reset_value(index,@defaults[index.to_s])
end

#delete(index) ⇒ Object

Deletes a key and associated data from store.



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# File 'lib/entity_storage.rb', line 48

def delete(index)
  Entity.remove_item(index)
end