Class IndexableBinaryStringTools

Provides support for converting byte sequences to s and back again. The resulting s preserve the original byte sequences' sort order.

The s are constructed using a Base 8000h encoding of the original binary data - each char of an encoded represents a 15-bit chunk from the byte sequence. Base 8000h was chosen because it allows for all lower 15 bits of char to be used without restriction; the surrogate range [U+D8000-U+DFFF] does not represent valid chars, and would require complicated handling to avoid them and allow use of char's high bit.

Although unset bits are used as padding in the final char, the original byte sequence could contain trailing bytes with no set bits (null bytes): padding is indistinguishable from valid information. To overcome this problem, a char is appended, indicating the number of encoded bytes in the final content char.

@lucene.experimental