1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#define _NEED_SUMMARY_CONFIG_IMPL 1
#include "SummaryConfig.h"
#include "rpinterface.h"
#include "result.h"
#include "juniperparams.h"
#include "Matcher.h"
#include "config.h"
#include "appender.h"
#include <vespa/vespalib/util/size_literals.h>
#include <vespa/log/log.h>
LOG_SETUP(".juniper.result");
namespace juniper {
/** Actual implementation of Juniper generated summaries. */
class SummaryImpl : public Summary
{
public:
explicit SummaryImpl() : _text() {}
explicit SummaryImpl(const std::string& t) : _text(t) {}
~SummaryImpl() override = default;
const char* Text() const override { return _text.c_str(); }
size_t Length() const override { return _text.size(); }
std::string _text;
};
Result::Result(const Config& config, QueryHandle& qhandle,
const char* docsum, size_t docsum_len, uint32_t langid) :
_qhandle(&qhandle),
_mo(qhandle.MatchObj(langid)),
_docsum(docsum),
_docsum_len(docsum_len),
_langid(langid),
_config(&config),
_matcher(),
_tokenizer(),
_summaries(),
_scan_done(false),
_dynsum_len(-1),
_max_matches(-1),
_surround_max(-1),
_stem_min(0),
_stem_extend(0),
_winsize(0),
_winsize_fallback_multiplier(10.0),
_max_match_candidates(1000)
{
if (!_mo) return; // The empty result..
const MatcherParams& mp = _config->_matcherparams;
const Fast_WordFolder* wordfolder = mp.WordFolder();
if (_qhandle->_stem_min < 0)
_stem_min = mp.StemMinLength();
else
_stem_min = _qhandle->_stem_min;
if (_qhandle->_stem_extend < 0)
_stem_extend = mp.StemMaxExtend();
else
_stem_extend = _qhandle->_stem_extend;
if (_qhandle->_winsize < 0)
_winsize = mp.MatchWindowSize();
else
_winsize = _qhandle->_winsize;
if (_qhandle->_winsize_fallback_multiplier < 0)
_winsize_fallback_multiplier = mp.MatchWindowSizeFallbackMultiplier();
else
_winsize_fallback_multiplier = _qhandle->_winsize_fallback_multiplier;
if (_qhandle->_max_match_candidates < 0) {
_max_match_candidates = mp.MaxMatchCandidates();
} else {
_max_match_candidates = _qhandle->_max_match_candidates;
}
/* Create the new pipeline */
_tokenizer = std::make_unique<JuniperTokenizer>(wordfolder, nullptr, 0, nullptr, nullptr);
_matcher = std::make_unique<Matcher>(this);
_matcher->SetProximityFactor(mp.ProximityFactor());
_registry = std::make_unique<SpecialTokenRegistry>(_matcher->getQuery());
if (qhandle._log_mask)
_matcher->set_log(qhandle._log_mask);
_tokenizer->SetSuccessor(_matcher.get());
if (!_registry->getSpecialTokens().empty()) {
_tokenizer->setRegistry(_registry.get());
}
}
Result::~Result() = default;
long Result::GetRelevancy()
{
if (!_mo) return PROXIMITYBOOST_NOCONSTRAINT_OFFSET;
if (!_mo->Query()) return PROXIMITYBOOST_NOCONSTRAINT_OFFSET;
Scan();
long retval = _matcher->GlobalRank();
LOG(debug, "juniper::GetRelevancy(%lu)", retval);
return retval;
}
Summary* Result::GetTeaser(const Config* alt_config)
{
LOG(debug, "juniper::GetTeaser");
const Config* cfg = (alt_config ? alt_config : _config);
const DocsumParams& dsp = cfg->_docsumparams;
if (_qhandle->_dynsum_len < 0)
_dynsum_len = dsp.Length();
else
_dynsum_len = _qhandle->_dynsum_len;
std::unique_ptr<SummaryImpl> sum;
// Avoid overhead when being called with an empty stack
if (_mo && _mo->Query()) {
Scan();
if (_qhandle->_max_matches < 0)
_max_matches = dsp.MaxMatches();
else
_max_matches = _qhandle->_max_matches;
if (_qhandle->_surround_max < 0)
_surround_max = dsp.SurroundMax();
else
_surround_max = _qhandle->_surround_max;
SummaryDesc* sdesc =
_matcher->CreateSummaryDesc(_dynsum_len, dsp.MinLength(), _max_matches, _surround_max);
if (sdesc) {
size_t char_size;
sum = std::make_unique<SummaryImpl>(BuildSummary(_docsum, _docsum_len, sdesc, cfg->_sumconf, char_size));
DeleteSummaryDesc(sdesc);
}
}
if (!sum) {
sum = std::make_unique<SummaryImpl>();
}
if (sum->_text.empty() && dsp.Fallback() == DocsumParams::FALLBACK_PREFIX)
{
std::vector<char> text;
Appender a(cfg->_sumconf);
ucs4_t buf[TOKEN_DSTLEN];
const char *src = _docsum;
const char *src_end = _docsum + _docsum_len;
ucs4_t *dst = buf;
ucs4_t *dst_end = dst + TOKEN_DSTLEN;
const Fast_WordFolder *folder = _config->_matcherparams.WordFolder();
text.reserve(std::min(4_Ki, size_t(_dynsum_len*2)));
if (src_end - src <= _dynsum_len) {
a.append(text, src, src_end - src);
src = src_end; // ensure while loop not run
}
while (src < src_end) {
const char *startpos;
size_t tokenLen;
const char *old_src = src;
size_t old_sum_len = text.size();
src = folder->UCS4Tokenize(src, src_end, dst, dst_end,
startpos, tokenLen);
if (dst[0] == 0) {
a.append(text, old_src, src_end - old_src);
src = src_end; // ensure loop termination
} else {
a.append(text, old_src, src - old_src);
}
if (text.size() > (size_t) _dynsum_len) {
text.resize(old_sum_len);
text.insert(text.end(), cfg->_sumconf->dots().begin(), cfg->_sumconf->dots().end());
break;
}
}
sum->_text = std::string(&text[0], text.size());
}
_summaries.emplace_back(std::move(sum));
return _summaries.back().get();
}
Summary* Result::GetLog()
{
// Avoid overhead when being called with an empty stack
std::unique_ptr<Summary> sum;
if (_mo && _mo->Query())
{
LOG(debug, "juniper::GetLog");
Scan();
sum = std::make_unique<SummaryImpl>(_matcher->GetLog());
}
else {
sum = std::make_unique<SummaryImpl>();
}
_summaries.emplace_back(std::move(sum));
return _summaries.back().get();
}
} // end namespace juniper
|
