Class: PG::BasicTypeRegistry::CoderMap
- Inherits:
-
Object
- Object
- PG::BasicTypeRegistry::CoderMap
- Defined in:
- lib/pg/basic_type_mapping.rb
Overview
An instance of this class stores the coders that should be used for a given wire format (text or binary) and type cast direction (encoder or decoder).
Constant Summary collapse
- DONT_QUOTE_TYPES =
Hash of text types that don’t require quotation, when used within composite types.
type.name => true
%w[ int2 int4 int8 float4 float8 oid bool date timestamp timestamptz ].inject({}){|h,e| h[e] = true; h }
Instance Attribute Summary collapse
-
#coders ⇒ Object
readonly
Returns the value of attribute coders.
-
#coders_by_name ⇒ Object
readonly
Returns the value of attribute coders_by_name.
-
#coders_by_oid ⇒ Object
readonly
Returns the value of attribute coders_by_oid.
-
#typenames_by_oid ⇒ Object
readonly
Returns the value of attribute typenames_by_oid.
Instance Method Summary collapse
- #coder_by_name(name) ⇒ Object
- #coder_by_oid(oid) ⇒ Object
-
#initialize(result, coders_by_name, format, arraycoder) ⇒ CoderMap
constructor
A new instance of CoderMap.
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_mapping.rb', line 39 def initialize(result, coders_by_name, format, arraycoder) coder_map = {} _ranges, nodes = result.partition { |row| row['typinput'] == 'range_in' } leaves, nodes = nodes.partition { |row| row['typelem'].to_i == 0 } arrays, nodes = nodes.partition { |row| row['typinput'] == 'array_in' } # populate the enum types _enums, leaves = leaves.partition { |row| row['typinput'] == 'enum_in' } # enums.each do |row| # coder_map[row['oid'].to_i] = OID::Enum.new # end # populate the base types leaves.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 end _records_by_oid = result.group_by { |row| row['oid'] } # populate composite types # nodes.each do |row| # add_oid row, records_by_oid, coder_map # 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 end end # populate range types # ranges.find_all { |row| coder_map.key? row['rngsubtype'].to_i }.each do |row| # subcoder = coder_map[row['rngsubtype'].to_i] # range = OID::Range.new subcoder # coder_map[row['oid'].to_i] = range # end @coders = coder_map.values @coders_by_name = @coders.inject({}){|h, t| h[t.name] = t; h } @coders_by_oid = @coders.inject({}){|h, t| h[t.oid] = t; h } @typenames_by_oid = result.inject({}){|h, t| h[t['oid'].to_i] = t['typname']; h } end |
Instance Attribute Details
#coders ⇒ Object (readonly)
Returns the value of attribute coders.
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# File 'lib/pg/basic_type_mapping.rb', line 97 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_mapping.rb', line 99 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_mapping.rb', line 98 def coders_by_oid @coders_by_oid end |
#typenames_by_oid ⇒ Object (readonly)
Returns the value of attribute typenames_by_oid.
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# File 'lib/pg/basic_type_mapping.rb', line 100 def typenames_by_oid @typenames_by_oid end |
Instance Method Details
#coder_by_name(name) ⇒ Object
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# File 'lib/pg/basic_type_mapping.rb', line 102 def coder_by_name(name) @coders_by_name[name] end |
#coder_by_oid(oid) ⇒ Object
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# File 'lib/pg/basic_type_mapping.rb', line 106 def coder_by_oid(oid) @coders_by_oid[oid] end |