Returns a function that can convert a value from the Ecto data format to a form that :eldap can interpret.

The functions (or types) returned by these calls will be invoked by Ecto while performing the translation of values to valid eldap data.

nils are simply passed straight through regardless of Ecto datatype. Additionally, :id, :binary, and other unspecified datatypes are directly returned to Ecto for native translation.

Examples

iex> Ecto.Ldap.Adapter.dumpers(:id, :id)
[:id]

iex> Ecto.Ldap.Adapter.dumpers(:string, nil)
{ :ok, nil}

iex> Ecto.Ldap.Adapter.dumpers(:binary, :binary)
[:binary]

iex> Ecto.Ldap.Adapter.dumpers(:woo, :woo)
[:woo]

iex> Ecto.Ldap.Adapter.dumpers(:integer, :integer)
[:integer]

Strings are converted to Erlang character lists.

Examples

iex> [conversion_function] = Ecto.Ldap.Adapter.dumpers({:in, :string}, {:in, :string})
iex> conversion_function.(["yes", "no"])
{ :ok, {:in, ['yes', 'no']}}

iex> [conversion_function] = Ecto.Ldap.Adapter.dumpers(:string, :string)
iex> conversion_function.("bob")
{ :ok, 'bob'}
iex> conversion_function.("Sören")
{ :ok, [83, 195, 182, 114, 101, 110]}
iex> conversion_function.("José")
{ :ok, [74, 111, 115, 195, 169]}
iex> conversion_function.(:atom)
{ :ok, 'atom'}

iex> [conversion_function] = Ecto.Ldap.Adapter.dumpers({:array, :string}, {:array, :string})
iex> conversion_function.(["list", "of", "skills"])
{ :ok, ['list', 'of', 'skills']}

Ecto.DateTimes are converted to a stringified ASN.1 GeneralizedTime format in UTC. Currently, fractional seconds are truncated.

Examples

iex> [conversion_function] = Ecto.Ldap.Adapter.dumpers(:datetime, :datetime)
iex> conversion_function.({{2016, 2, 2}, {0, 0, 0, 0}})
{ :ok, '20160202000000Z'}

iex> [conversion_function] = Ecto.Ldap.Adapter.dumpers(Ecto.DateTime, Ecto.DateTime)
iex> conversion_function.({{2016, 4, 1}, {12, 34, 56, 789000}})
{ :ok, '20160401123456Z'}
iex> conversion_function.({{2016, 4, 1}, {12, 34, 56, 0}})
{ :ok, '20160401123456Z'}