Class: PG::BasicTypeRegistry::CoderMapsBundle

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

Overview

An instance of this class stores CoderMap instances to be used for text and binary wire formats as well as encoder and decoder directions.

A PG::BasicTypeRegistry::CoderMapsBundle instance retrieves all type definitions from the PostgreSQL server and matches them with the coder definitions of the global PG::BasicTypeRegistry . It provides 4 separate CoderMap instances for the combinations of the two formats and directions.

A PG::BasicTypeRegistry::CoderMapsBundle instance can be used to initialize an instance of

  • PG::BasicTypeMapForResults

  • PG::BasicTypeMapForQueries

  • PG::BasicTypeMapBasedOnResult

by passing it instead of the connection object like so:

conn = PG::Connection.new
maps = PG::BasicTypeRegistry::CoderMapsBundle.new(conn)
conn.type_map_for_results = PG::BasicTypeMapForResults.new(maps)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(connection, registry: nil) ⇒ CoderMapsBundle

Returns a new instance of CoderMapsBundle.



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# File 'lib/pg/basic_type_registry.rb', line 113

def initialize(connection, registry: nil)
	registry ||= DEFAULT_TYPE_REGISTRY

	result = connection.exec(<<-SQL).to_a
		SELECT t.oid, t.typname, t.typelem, t.typdelim, ti.proname AS typinput
		FROM pg_type as t
		JOIN pg_proc as ti ON ti.oid = t.typinput
	SQL

	init_maps(registry, result.freeze)
	freeze
end

Instance Attribute Details

#typenames_by_oid ⇒ Object (readonly)

Returns the value of attribute typenames_by_oid.



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# File 'lib/pg/basic_type_registry.rb', line 111

def typenames_by_oid
  @typenames_by_oid
end

Instance Method Details

#each_format(direction) ⇒ Object 



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# File 'lib/pg/basic_type_registry.rb', line 142

def each_format(direction)
	@maps.map { |f| f[direction] }
end

#map_for(format, direction) ⇒ Object 



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# File 'lib/pg/basic_type_registry.rb', line 146

def map_for(format, direction)
	@maps[format][direction]
end