Class: PG::BasicTypeRegistry::CoderMap

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

Overview

An instance of this class stores the coders that should be used for a particular wire format (text or binary) and type cast direction (encoder or decoder).

Each coder object is filled with the PostgreSQL type name, OID, wire format and array coders are filled with the base elements_type.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(result, coders_by_name, format, arraycoder) ⇒ CoderMap

Returns a new instance of CoderMap.



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# File 'lib/pg/basic_type_registry.rb', line 45

def initialize(result, coders_by_name, format, arraycoder)
	coder_map = {}

	arrays, nodes = result.partition { |row| row['typinput'] == 'array_in' }

	# populate the base types
	nodes.find_all { |row| coders_by_name.key?(row['typname']) }.each do |row|
		coder = coders_by_name[row['typname']].dup
		coder.oid = row['oid'].to_i
		coder.name = row['typname']
		coder.format = format
		coder_map[coder.oid] = coder.freeze
	end

	if arraycoder
		# populate array types
		arrays.each do |row|
			elements_coder = coder_map[row['typelem'].to_i]
			next unless elements_coder

			coder = arraycoder.new
			coder.oid = row['oid'].to_i
			coder.name = row['typname']
			coder.format = format
			coder.elements_type = elements_coder
			coder.needs_quotation = !DONT_QUOTE_TYPES[elements_coder.name]
			coder_map[coder.oid] = coder.freeze
		end
	end

	@coders = coder_map.values.freeze
	@coders_by_name = @coders.inject({}){|h, t| h[t.name] = t; h }.freeze
	@coders_by_oid = @coders.inject({}){|h, t| h[t.oid] = t; h }.freeze
	freeze
end

Instance Attribute Details

#coders ⇒ Object (readonly)

Returns the value of attribute coders.



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# File 'lib/pg/basic_type_registry.rb', line 81

def coders
  @coders
end

#coders_by_name ⇒ Object (readonly)

Returns the value of attribute coders_by_name.



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# File 'lib/pg/basic_type_registry.rb', line 83

def coders_by_name
  @coders_by_name
end

#coders_by_oid ⇒ Object (readonly)

Returns the value of attribute coders_by_oid.



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# File 'lib/pg/basic_type_registry.rb', line 82

def coders_by_oid
  @coders_by_oid
end

Instance Method Details

#coder_by_name(name) ⇒ Object 



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# File 'lib/pg/basic_type_registry.rb', line 85

def coder_by_name(name)
	@coders_by_name[name]
end

#coder_by_oid(oid) ⇒ Object 



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# File 'lib/pg/basic_type_registry.rb', line 89

def coder_by_oid(oid)
	@coders_by_oid[oid]
end