func (rt *UnicodeTokenizer) Tokenize(input []byte) analysis.TokenStream {
rv := make(analysis.TokenStream, 0)
segmenter := segment.NewWordSegmenterDirect(input)
start := 0
pos := 1
for segmenter.Segment() {
segmentBytes := segmenter.Bytes()
end := start + len(segmentBytes)
if segmenter.Type() != segment.None {
token := analysis.Token{
Term: segmentBytes,
Start: start,
End: end,
Position: pos,
Type: convertType(segmenter.Type()),
}
rv = append(rv, &token)
pos++
}
start = end
}
return rv
}
func (rt *UnicodeTokenizer) Tokenize(input []byte) analysis.TokenStream {
rvx := make([]analysis.TokenStream, 0, 10) // When rv gets full, append to rvx.
rv := make(analysis.TokenStream, 0, 1)
ta := []analysis.Token(nil)
taNext := 0
segmenter := segment.NewWordSegmenterDirect(input)
start := 0
pos := 1
guessRemaining := func(end int) int {
avgSegmentLen := end / (len(rv) + 1)
if avgSegmentLen < 1 {
avgSegmentLen = 1
}
remainingLen := len(input) - end
return remainingLen / avgSegmentLen
}
for segmenter.Segment() {
segmentBytes := segmenter.Bytes()
end := start + len(segmentBytes)
if segmenter.Type() != segment.None {
if taNext >= len(ta) {
remainingSegments := guessRemaining(end)
if remainingSegments > 1000 {
remainingSegments = 1000
}
if remainingSegments < 1 {
remainingSegments = 1
}
ta = make([]analysis.Token, remainingSegments)
taNext = 0
}
token := &ta[taNext]
taNext++
token.Term = segmentBytes
token.Start = start
token.End = end
token.Position = pos
token.Type = convertType(segmenter.Type())
if len(rv) >= cap(rv) { // When rv is full, save it into rvx.
rvx = append(rvx, rv)
rvCap := cap(rv) * 2
if rvCap > 256 {
rvCap = 256
}
rv = make(analysis.TokenStream, 0, rvCap) // Next rv cap is bigger.
}
rv = append(rv, token)
pos++
}
start = end
}
if len(rvx) > 0 {
n := len(rv)
for _, r := range rvx {
n += len(r)
}
rall := make(analysis.TokenStream, 0, n)
for _, r := range rvx {
rall = append(rall, r...)
}
return append(rall, rv...)
}
return rv
}
