Additionally:
- Throw IllegalArgumentException instead of NullPointerException from constructor for null EmbeddingModel.
- Delegate Documentation embedding generation to embed(:Document) method called by doAdd(:Document).
- Break doSimilaritySearch(:SearchRequest) method into discrete, overridable operations.
- Implement load(:File) in terms of load(:Resource) using a FileSystemResource.
- Hide implementation details of EmbeddedMath dotProduct(..) and norm(..) methods.
- Use more meaningful and descriptive variable names.
- Simplify Exception handling in save(:File).
- Add whitespace to improve readability.
- Fix compiler warnings.