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hl7v2
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Pure Elixir HL7 v2.x toolkit — schema-driven parsing, typed segments, message builder, MLLP transport
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lib/hl7v2/type/rcd.ex
defmodule HL7v2.Type.RCD do
@moduledoc """
Row Column Definition (RCD) -- HL7v2 composite data type.
Defines columns in a tabular response. Used in RDF segment.
3 components:
1. Segment Field Name (ST) -- e.g., "PID.3"
2. HL7 Data Type (ID) -- Table 0440: e.g., "ST", "NM", "CX"
3. Maximum Column Width (NM)
"""
@behaviour HL7v2.Type
alias HL7v2.Type
defstruct [:segment_field_name, :hl7_data_type, :maximum_column_width]
@type t :: %__MODULE__{
segment_field_name: binary() | nil,
hl7_data_type: binary() | nil,
maximum_column_width: binary() | nil
}
@doc """
Parses an RCD from a list of components.
## Examples
iex> HL7v2.Type.RCD.parse(["PID.3", "CX", "20"])
%HL7v2.Type.RCD{segment_field_name: "PID.3", hl7_data_type: "CX", maximum_column_width: "20"}
iex> HL7v2.Type.RCD.parse(["OBX.5", "ST"])
%HL7v2.Type.RCD{segment_field_name: "OBX.5", hl7_data_type: "ST"}
iex> HL7v2.Type.RCD.parse([])
%HL7v2.Type.RCD{}
"""
@spec parse(list()) :: t()
def parse(components) when is_list(components) do
%__MODULE__{
segment_field_name: Type.get_component(components, 0),
hl7_data_type: Type.get_component(components, 1),
maximum_column_width: Type.get_component(components, 2)
}
end
@doc """
Encodes an RCD to a list of component strings.
## Examples
iex> HL7v2.Type.RCD.encode(%HL7v2.Type.RCD{segment_field_name: "PID.3", hl7_data_type: "CX", maximum_column_width: "20"})
["PID.3", "CX", "20"]
iex> HL7v2.Type.RCD.encode(nil)
[]
"""
@spec encode(t() | nil) :: list()
def encode(nil), do: []
def encode(%__MODULE__{} = rcd) do
[
rcd.segment_field_name || "",
rcd.hl7_data_type || "",
rcd.maximum_column_width || ""
]
|> Type.trim_trailing()
end
end