Benjamin Trent 5ab9e75e28
[7.x] [ML][Inference] lang_ident model (#50292) (#50675)
* [ML][Inference] lang_ident model (#50292)

This PR contains a java port of Google's CLD3 compact NN model https://github.com/google/cld3

The ported model is formatted to fit within our inference model formatting and stored as a resource in the `:xpack:ml:` plugin and is under basic license.

The model is broken up into two major parts:
- Preprocessing through the custom embedding (based on CLD3's embedding layer)
- Pushing the embedded text through the two layers of fully connected shallow NN. 

Main differences between this port and CLD3:
- We take advantage of Java's internal Unicode handling where possible (i.e. codepoints, characters, decoders, etc.)
- We do not trim down input text by removing duplicated tokens
- We do not encode doubles/floats as longs/integers.
2020-01-06 16:24:03 -05:00
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