Eflatbuffers
This is a flatbuffers implementation in Elixir.
In contrast to existing implementations there is no need to compile code from a schema. Instead, data and schemas are processed dynamically at runtime, offering greater flexibility.
Using Eflatbuffers
Schema file:
table Root {
foreground:Color;
background:Color;
}
table Color {
red: ubyte;
green: ubyte;
blue: ubyte;
}
root_type Root;
Parsing the schema:
iex(1)> schema = File.read!(path_to_schema) |> Eflatbuffers.Schema.parse!
{%{Color: {:table,
%{fields: [red: {:ubyte, %{default: 0}}, green: {:ubyte, %{default: 0}},
blue: {:ubyte, %{default: 0}}],
indices: %{blue: {2, {:ubyte, %{default: 0}}},
green: {1, {:ubyte, %{default: 0}}},
red: {0, {:ubyte, %{default: 0}}}}}},
Root: {:table,
%{fields: [foreground: {:table, %{name: :Color}},
background: {:table, %{name: :Color}}],
indices: %{background: {1, {:table, %{name: :Color}}},
foreground: {0, {:table, %{name: :Color}}}}}}}, %{root_type: :Root}}Serializing data:
iex(2)> color_scheme = %{foreground: %{red: 128, green: 20, blue: 255}, background: %{red: 0, green: 100, blue: 128}}
iex(3)> color_scheme_fb = Eflatbuffers.write!(color_scheme, schema)
<<16, 0, 0, 0, 0, 0, 0, 0, 8, 0, 12, 0, 4, 0, 8, 0, 8, 0, 0, 0, 18, 0, 0, 0, 31,
0, 0, 0, 10, 0, 7, 0, 4, 0, 5, 0, 6, 0, 10, 0, 0, 0, 128, 20, 255, 10, 0, 6,
0, 0, ...>>So we can read the whole thing which converts it back into a map:
iex(4)> Eflatbuffers.read!(color_scheme_fb, schema)
%{background: %{blue: 128, green: 100, red: 0},
foreground: %{blue: 255, green: 20, red: 128}}Or we can get a portion with means it seeks into the flatbuffer and only deserializes the part below the path:
iex(5)> Eflatbuffers.get!(color_scheme_fb, [:background], schema)
%{blue: 128, green: 100, red: 0}
iex(6)> Eflatbuffers.get!(color_scheme_fb, [:background, :green], schema)
100Comparing Eflatbufers to flatc
features both in Eflatbufers and flatc
- tables
- scalars
- strings
- vectors
- unions
- enums
- defaults
- json to fb
- fb to json
- file identifier + validation
- random access
- validate file identifiers
features only in Eflatbuffers
- vectors of enums
features only in flatc
- shared strings
- shared vtables
- includes
- alignment
- additional attributes
- structs
deviation of Eflatbuffers from flatc
- default values are written to json
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent