Module: Avro::SchemaCompatibility

Defined in:
lib/avro/schema_compatibility.rb

Defined Under Namespace

Classes: Checker

Class Method Summary collapse

Class Method Details

.can_read?(writers_schema, readers_schema) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/avro/schema_compatibility.rb', line 18

def self.can_read?(writers_schema, readers_schema)
  Checker.new.can_read?(writers_schema, readers_schema)
end

.match_schemas(writers_schema, readers_schema) ⇒ Object 



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# File 'lib/avro/schema_compatibility.rb', line 26

def self.match_schemas(writers_schema, readers_schema)
  # Note: this does not support aliases!
  w_type = writers_schema.type_sym
  r_type = readers_schema.type_sym

  # This conditional is begging for some OO love.
  if w_type == :union || r_type == :union
    return true
  end

  if w_type == r_type
    return true if Schema::PRIMITIVE_TYPES_SYM.include?(r_type)

    case r_type
    when :record
      return writers_schema.fullname == readers_schema.fullname
    when :error
      return writers_schema.fullname == readers_schema.fullname
    when :request
      return true
    when :fixed
      return writers_schema.fullname == readers_schema.fullname &&
        writers_schema.size == readers_schema.size
    when :enum
      return writers_schema.fullname == readers_schema.fullname
    when :map
      return match_schemas(writers_schema.values, readers_schema.values)
    when :array
      return match_schemas(writers_schema.items, readers_schema.items)
    end
  end

  # Handle schema promotion
  if w_type == :int && [:long, :float, :double].include?(r_type)
    return true
  elsif w_type == :long && [:float, :double].include?(r_type)
    return true
  elsif w_type == :float && r_type == :double
    return true
  elsif w_type == :string && r_type == :bytes
    return true
  elsif w_type == :bytes && r_type == :string
    return true
  end

  return false
end

.mutual_read?(writers_schema, readers_schema) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/avro/schema_compatibility.rb', line 22

def self.mutual_read?(writers_schema, readers_schema)
  Checker.new.mutual_read?(writers_schema, readers_schema)
end