class Amalgalite::TypeMap
TypeMap defines the protocol used between Ruby and SQLite for mapping binding types, used in prepared statements; and result types, used in returning objects from a query.
Public Instance Methods
#bind_type_of is called during the Amalgalite::Statement#bind process to convert the bind parameter to the appropriate SQLite types. This method MUST return one of the valid constants in the namespace Amalgalite::SQLite::Constants::DataType
# File lib/amalgalite/type_map.rb, line 22 def bind_type_of( obj ) raise NotImplementedError, "bind_type_of has not been implemented" end
#result_value_of is called during the result processing of column values to convert an SQLite database value into the appropriate Ruby class.
declared_type
is the string from the original CREATE TABLE
statment from which the column value originates. It may also be nil if
the origin column cannot be determined.
value
is the SQLite value from the column as either a Ruby
String, Integer, Float or Amalgalite::Blob.
result_value should return the value that is to be put into the result set for the query. It may do nothing, or it may do massive amounts of conversion.
# File lib/amalgalite/type_map.rb, line 43 def result_value_of( delcared_type, value ) raise NotImplementedError, "result_value_of has not been implemented" end