Trying to create a collection of classes. Not going too well.

table_definition.scala

class TableDefinition(val name: String, val columns: Map[String, Class]) {

}

object TableDefinition {
  val table_definitions = collection.mutable.Map[String, TableDefinition]()

  def register(name: String, attributes: Map[String, Class]) {
    TableDefinition.register(new TableDefinition(name, attributes) )
  }
}