def rename(new_name)
case new_name
when Symbol, String
else
raise TypeError, "new_name must be a string or symbol"
end
new_name = new_name.to_s
if new_name.empty? or new_name.include? ".."
raise Mongo::InvalidNSName, "collection names cannot be empty"
end
if new_name.include? "$"
raise Mongo::InvalidNSName, "collection names must not contain '$'"
end
if new_name.match(/^\./) or new_name.match(/\.$/)
raise Mongo::InvalidNSName, "collection names must not start or end with '.'"
end
@db.rename_collection(@name, new_name)
@name = new_name
end