Java implementation of iSAX2+ [1]
[1] Alessandro Camerra, Jin Shieh, Themis Palpanas, Thanawin Rakthanmanon, Eamonn Keogh. Beyond One Billion Time Series: Indexing and Mining Very Large Time Series Collections with iSAX2+. Knowledge and Information Systems (KAIS) Journal 39(1):123-151, 2014