1 | /**********************************************************************
|
---|
2 | *
|
---|
3 | * queryfilter.cpp --
|
---|
4 | * Copyright (C) 1999 The New Zealand Digital Library Project
|
---|
5 | *
|
---|
6 | * PUT COPYRIGHT NOTICE HERE
|
---|
7 | *
|
---|
8 | * $Id: queryfilter.cpp 358 1999-07-09 02:19:44Z rjmcnab $
|
---|
9 | *
|
---|
10 | *********************************************************************/
|
---|
11 |
|
---|
12 | /*
|
---|
13 | $Log$
|
---|
14 | Revision 1.12 1999/07/09 02:19:43 rjmcnab
|
---|
15 | Fixed a couple of compiler conflicts
|
---|
16 |
|
---|
17 | Revision 1.11 1999/07/08 20:49:44 rjmcnab
|
---|
18 | Added result_num to the ResultDocInto_t structure.
|
---|
19 |
|
---|
20 | Revision 1.10 1999/07/07 06:19:46 rjmcnab
|
---|
21 | Added ability to combine two or more independant queries.
|
---|
22 |
|
---|
23 | Revision 1.9 1999/07/01 09:29:20 rjmcnab
|
---|
24 | Changes for better reporting of number documents which match a query. Changes
|
---|
25 | should still work as before with older versions of mg.
|
---|
26 |
|
---|
27 | Revision 1.8 1999/07/01 03:59:54 rjmcnab
|
---|
28 | reduced MAXDOCS to 200 (more reasonable ???). I also added a virtual
|
---|
29 | method for post-processing the query.
|
---|
30 |
|
---|
31 | Revision 1.7 1999/06/30 04:04:13 rjmcnab
|
---|
32 | made stemming functions available from mgsearch and made the stems
|
---|
33 | for the query terms available in queryinfo
|
---|
34 |
|
---|
35 | Revision 1.6 1999/06/29 22:06:23 rjmcnab
|
---|
36 | Added a couple of fields to queryinfo to handle a special version
|
---|
37 | of mg.
|
---|
38 |
|
---|
39 | Revision 1.5 1999/06/27 22:08:48 sjboddie
|
---|
40 | now check for defaultindex, defaultsubcollection, and defaultlanguage
|
---|
41 | entries in config files
|
---|
42 |
|
---|
43 | Revision 1.4 1999/06/16 02:03:25 sjboddie
|
---|
44 | fixed bug in isApprox and set MAXDOCS to always be 500
|
---|
45 |
|
---|
46 | Revision 1.3 1999/04/19 23:56:09 rjmcnab
|
---|
47 | Finished the gdbm metadata stuff
|
---|
48 |
|
---|
49 | Revision 1.2 1999/04/12 03:45:03 rjmcnab
|
---|
50 | Finished the query filter.
|
---|
51 |
|
---|
52 | Revision 1.1 1999/04/06 22:22:09 rjmcnab
|
---|
53 | Initial revision.
|
---|
54 |
|
---|
55 | */
|
---|
56 |
|
---|
57 |
|
---|
58 | #include "queryfilter.h"
|
---|
59 | #include "fileutil.h"
|
---|
60 | #include "queryinfo.h"
|
---|
61 |
|
---|
62 | #define MAXDOCS 200 // note that maxdocs must be at least as large
|
---|
63 | // as the highest possible value of EndResults
|
---|
64 |
|
---|
65 | // some useful functions
|
---|
66 |
|
---|
67 | // translate will return true if successful
|
---|
68 | static bool translate (gdbmclass *gdbmptr, int docnum, text_t &trans_OID) {
|
---|
69 | infodbclass info;
|
---|
70 |
|
---|
71 | trans_OID.clear();
|
---|
72 |
|
---|
73 | // get the info
|
---|
74 | if (gdbmptr == NULL) return false;
|
---|
75 | if (!gdbmptr->getinfo(docnum, info)) return false;
|
---|
76 |
|
---|
77 | // translate
|
---|
78 | if (info["section"].empty()) return false;
|
---|
79 |
|
---|
80 | trans_OID = info["section"];
|
---|
81 | return true;
|
---|
82 | }
|
---|
83 |
|
---|
84 |
|
---|
85 | // whether document results are needed
|
---|
86 | static bool need_matching_docs (int filterResultOptions) {
|
---|
87 | return ((filterResultOptions & FROID) || (filterResultOptions & FRranking) ||
|
---|
88 | (filterResultOptions & FRmetadata));
|
---|
89 | }
|
---|
90 |
|
---|
91 | // whether term information is needed
|
---|
92 | static bool need_term_info (int filterResultOptions) {
|
---|
93 | return ((filterResultOptions & FRtermFreq) || (filterResultOptions & FRmatchTerms));
|
---|
94 | }
|
---|
95 |
|
---|
96 | ///////////////////////////////
|
---|
97 | // methods for resultsorderer_t
|
---|
98 | ///////////////////////////////
|
---|
99 |
|
---|
100 | resultsorderer_t::resultsorderer_t() {
|
---|
101 | clear ();
|
---|
102 | }
|
---|
103 |
|
---|
104 | void resultsorderer_t::clear() {
|
---|
105 | compare_phrase_match = false;
|
---|
106 | compare_terms_match = false;
|
---|
107 | compare_doc_weight = true;
|
---|
108 |
|
---|
109 | docset = NULL;
|
---|
110 | }
|
---|
111 |
|
---|
112 | bool resultsorderer_t::operator()(const int &t1, const int &t2) const {
|
---|
113 | if (docset == NULL) return t1>t2;
|
---|
114 |
|
---|
115 | docresultmap::iterator t1_here = docset->find(t1);
|
---|
116 | docresultmap::iterator t2_here = docset->find(t2);
|
---|
117 | docresultmap::iterator end = docset->end();
|
---|
118 |
|
---|
119 | // sort all the document numbers not in the document set to
|
---|
120 | // the end of the list
|
---|
121 | if (t1_here == end) {
|
---|
122 | if (t2_here == end) return t1>t2;
|
---|
123 | else return true;
|
---|
124 | } else if (t2_here == end) return false;
|
---|
125 |
|
---|
126 | if (compare_phrase_match) {
|
---|
127 | if ((*t1_here).second.num_phrase_match > (*t2_here).second.num_phrase_match) return true;
|
---|
128 | if ((*t1_here).second.num_phrase_match < (*t2_here).second.num_phrase_match) return false;
|
---|
129 | }
|
---|
130 |
|
---|
131 | if (compare_terms_match) {
|
---|
132 | if ((*t1_here).second.num_query_terms_matched > (*t2_here).second.num_query_terms_matched) return true;
|
---|
133 | if ((*t1_here).second.num_query_terms_matched < (*t2_here).second.num_query_terms_matched) return false;
|
---|
134 | }
|
---|
135 |
|
---|
136 | if (compare_doc_weight) {
|
---|
137 | if ((*t1_here).second.docweight > (*t2_here).second.docweight) return true;
|
---|
138 | if ((*t1_here).second.docweight < (*t2_here).second.docweight) return false;
|
---|
139 | }
|
---|
140 |
|
---|
141 | return t1>t2;
|
---|
142 | }
|
---|
143 |
|
---|
144 |
|
---|
145 |
|
---|
146 |
|
---|
147 | /////////////////////////////////
|
---|
148 | // functions for queryfilterclass
|
---|
149 | /////////////////////////////////
|
---|
150 |
|
---|
151 | // do aditional query processing
|
---|
152 | void queryfilterclass::post_process (const queryparamclass &/*queryparams*/,
|
---|
153 | queryresultsclass &/*queryresults*/) {
|
---|
154 | }
|
---|
155 |
|
---|
156 | // get the query parameters
|
---|
157 | void queryfilterclass::parse_query_params (const FilterRequest_t &request,
|
---|
158 | vector<queryparamclass> &query_params,
|
---|
159 | int &startresults,
|
---|
160 | int &endresults,
|
---|
161 | ostream &logout) {
|
---|
162 | outconvertclass text_t2ascii;
|
---|
163 |
|
---|
164 | // set defaults for the return parameters
|
---|
165 | query_params.erase(query_params.begin(), query_params.end());
|
---|
166 | startresults = filterOptions["StartResults"].defaultValue.getint();
|
---|
167 | endresults = filterOptions["EndResults"].defaultValue.getint();
|
---|
168 |
|
---|
169 | // set defaults for query parameters
|
---|
170 | queryparamclass query;
|
---|
171 | query.combinequery = "or"; // first one must be "or"
|
---|
172 | query.collection = collection;
|
---|
173 | query.index = filterOptions["Index"].defaultValue;
|
---|
174 | query.subcollection = filterOptions["Subcollection"].defaultValue;
|
---|
175 | query.language = filterOptions["Language"].defaultValue;
|
---|
176 | query.querystring.clear();
|
---|
177 | query.search_type = (filterOptions["QueryType"].defaultValue == "ranked");
|
---|
178 | query.casefolding = (filterOptions["Casefold"].defaultValue == "true");
|
---|
179 | query.stemming = (filterOptions["Stem"].defaultValue == "true");
|
---|
180 | query.maxdocs = MAXDOCS; // default for single query
|
---|
181 |
|
---|
182 | OptionValue_tarray::const_iterator options_here = request.filterOptions.begin();
|
---|
183 | OptionValue_tarray::const_iterator options_end = request.filterOptions.end();
|
---|
184 | while (options_here != options_end) {
|
---|
185 | if ((*options_here).name == "CombineQuery") {
|
---|
186 | // add this query
|
---|
187 |
|
---|
188 | // "all", needed when combining queries where the document results are needed
|
---|
189 | if (need_matching_docs (request.filterResultOptions)) query.maxdocs = -1;
|
---|
190 | query_params.push_back (query);
|
---|
191 |
|
---|
192 | // start on next query
|
---|
193 | query.clear();
|
---|
194 | query.combinequery = (*options_here).value;
|
---|
195 |
|
---|
196 | // set defaults for query parameters
|
---|
197 | query.collection = collection;
|
---|
198 | query.index = filterOptions["Index"].defaultValue;
|
---|
199 | query.subcollection = filterOptions["Subcollection"].defaultValue;
|
---|
200 | query.language = filterOptions["Language"].defaultValue;
|
---|
201 | query.querystring.clear();
|
---|
202 | query.search_type = (filterOptions["QueryType"].defaultValue == "ranked");
|
---|
203 | query.casefolding = (filterOptions["Casefold"].defaultValue == "true");
|
---|
204 | query.stemming = (filterOptions["Stem"].defaultValue == "true");
|
---|
205 |
|
---|
206 | // "all", needed when combining queries where the document results are needed
|
---|
207 | if (need_matching_docs (request.filterResultOptions)) query.maxdocs = -1;
|
---|
208 | else query.maxdocs = MAXDOCS; // "all"
|
---|
209 |
|
---|
210 | } else if ((*options_here).name == "StartResults") {
|
---|
211 | startresults = (*options_here).value.getint();
|
---|
212 | } else if ((*options_here).name == "EndResults") {
|
---|
213 | endresults = (*options_here).value.getint();
|
---|
214 | } else if ((*options_here).name == "QueryType") {
|
---|
215 | query.search_type = ((*options_here).value == "ranked");
|
---|
216 | } else if ((*options_here).name == "Term") {
|
---|
217 | query.querystring = (*options_here).value;
|
---|
218 | } else if ((*options_here).name == "Casefold") {
|
---|
219 | query.casefolding = ((*options_here).value == "true");
|
---|
220 | } else if ((*options_here).name == "Stem") {
|
---|
221 | query.stemming = ((*options_here).value == "true");
|
---|
222 | } else if ((*options_here).name == "Index") {
|
---|
223 | query.index = (*options_here).value;
|
---|
224 | } else if ((*options_here).name == "Subcollection") {
|
---|
225 | query.subcollection = (*options_here).value;
|
---|
226 | } else if ((*options_here).name == "Language") {
|
---|
227 | query.language = (*options_here).value;
|
---|
228 | } else {
|
---|
229 | logout << text_t2ascii
|
---|
230 | << "warning: unknown queryfilter option \""
|
---|
231 | << (*options_here).name
|
---|
232 | << "\" ignored.\n\n";
|
---|
233 | }
|
---|
234 |
|
---|
235 | options_here++;
|
---|
236 | }
|
---|
237 |
|
---|
238 | // add the last query
|
---|
239 | query_params.push_back (query);
|
---|
240 | }
|
---|
241 |
|
---|
242 |
|
---|
243 |
|
---|
244 | // do query that might involve multiple sub queries
|
---|
245 | // mgsearchptr and gdbmptr are assumed to be valid
|
---|
246 | void queryfilterclass::do_multi_query (const FilterRequest_t &request,
|
---|
247 | const vector<queryparamclass> &query_params,
|
---|
248 | queryresultsclass &multiresults,
|
---|
249 | comerror_t &err, ostream &logout) {
|
---|
250 | outconvertclass text_t2ascii;
|
---|
251 |
|
---|
252 | err = noError;
|
---|
253 | mgsearchptr->setcollectdir (collectdir);
|
---|
254 | multiresults.clear();
|
---|
255 |
|
---|
256 | vector<queryparamclass>::const_iterator query_here = query_params.begin();
|
---|
257 | vector<queryparamclass>::const_iterator query_end = query_params.end();
|
---|
258 | while (query_here != query_end) {
|
---|
259 | queryresultsclass thisqueryresults;
|
---|
260 |
|
---|
261 | if (!mgsearchptr->search(*query_here, thisqueryresults)) {
|
---|
262 | // most likely a system problem
|
---|
263 | logout << text_t2ascii
|
---|
264 | << "system problem: could not do search with mg for index \""
|
---|
265 | << (*query_here).index << (*query_here).subcollection
|
---|
266 | << (*query_here).language << "\".\n\n";
|
---|
267 | err = systemProblem;
|
---|
268 | return;
|
---|
269 | }
|
---|
270 |
|
---|
271 | // combine the results
|
---|
272 | if (need_matching_docs (request.filterResultOptions)) {
|
---|
273 | // post-process the results if needed
|
---|
274 | if (!thisqueryresults.postprocessed && thisqueryresults.orgterms.size() > 1 &&
|
---|
275 | !thisqueryresults.docs.docset.empty()) {
|
---|
276 | post_process (*query_here, thisqueryresults);
|
---|
277 | thisqueryresults.postprocessed = true;
|
---|
278 | multiresults.postprocessed = true;
|
---|
279 | }
|
---|
280 |
|
---|
281 | if (query_params.size() == 1) {
|
---|
282 | multiresults.docs = thisqueryresults.docs; // just one set of results
|
---|
283 | multiresults.docs_matched = thisqueryresults.docs_matched;
|
---|
284 | multiresults.is_approx = thisqueryresults.is_approx;
|
---|
285 |
|
---|
286 | } else {
|
---|
287 | if ((*query_here).combinequery == "and") {
|
---|
288 | multiresults.docs.combine_and (thisqueryresults.docs);
|
---|
289 | } else if ((*query_here).combinequery == "or") {
|
---|
290 | multiresults.docs.combine_or (thisqueryresults.docs);
|
---|
291 | } else if ((*query_here).combinequery == "not") {
|
---|
292 | multiresults.docs.combine_not (thisqueryresults.docs);
|
---|
293 | }
|
---|
294 | multiresults.docs_matched = multiresults.docs.docset.size();
|
---|
295 | multiresults.is_approx = false;
|
---|
296 | }
|
---|
297 | }
|
---|
298 |
|
---|
299 | // combine the term information
|
---|
300 | if (need_term_info (request.filterResultOptions)) {
|
---|
301 | // append the terms
|
---|
302 | multiresults.orgterms.insert(multiresults.orgterms.end(),
|
---|
303 | thisqueryresults.orgterms.begin(),
|
---|
304 | thisqueryresults.orgterms.end());
|
---|
305 |
|
---|
306 | // add the term variants
|
---|
307 | text_tset::iterator termvar_here = thisqueryresults.termvariants.begin();
|
---|
308 | text_tset::iterator termvar_end = thisqueryresults.termvariants.end();
|
---|
309 | while (termvar_here != termvar_end) {
|
---|
310 | multiresults.termvariants.insert(*termvar_here);
|
---|
311 | termvar_here++;
|
---|
312 | }
|
---|
313 | }
|
---|
314 |
|
---|
315 | query_here++;
|
---|
316 | }
|
---|
317 |
|
---|
318 | // sort and unique the query terms
|
---|
319 | multiresults.sortuniqqueryterms ();
|
---|
320 | }
|
---|
321 |
|
---|
322 |
|
---|
323 | void queryfilterclass::sort_doc_results (const FilterRequest_t &/*request*/,
|
---|
324 | docresultsclass &docs) {
|
---|
325 | resultsorderer_t resultsorderer;
|
---|
326 | resultsorderer.docset = &(docs.docset);
|
---|
327 |
|
---|
328 | // first get a list of document numbers
|
---|
329 | docs.docnum_order();
|
---|
330 |
|
---|
331 | sort (docs.docorder.begin(), docs.docorder.end(), resultsorderer);
|
---|
332 | }
|
---|
333 |
|
---|
334 |
|
---|
335 |
|
---|
336 | queryfilterclass::queryfilterclass () {
|
---|
337 | gdbmptr = NULL;
|
---|
338 | mgsearchptr = NULL;
|
---|
339 |
|
---|
340 | FilterOption_t filtopt;
|
---|
341 | filtopt.name = "CombineQuery";
|
---|
342 | filtopt.type = FilterOption_t::enumeratedt;
|
---|
343 | filtopt.repeatable = FilterOption_t::onePerQuery;
|
---|
344 | filtopt.defaultValue = "and";
|
---|
345 | filtopt.validValues.push_back("and");
|
---|
346 | filtopt.validValues.push_back("or");
|
---|
347 | filtopt.validValues.push_back("not");
|
---|
348 | filterOptions["CombineQuery"] = filtopt;
|
---|
349 |
|
---|
350 | // -- onePerQuery StartResults integer
|
---|
351 | filtopt.clear();
|
---|
352 | filtopt.name = "StartResults";
|
---|
353 | filtopt.type = FilterOption_t::integert;
|
---|
354 | filtopt.repeatable = FilterOption_t::onePerQuery;
|
---|
355 | filtopt.defaultValue = "1";
|
---|
356 | filtopt.validValues.push_back("1");
|
---|
357 | filtopt.validValues.push_back("1000");
|
---|
358 | filterOptions["StartResults"] = filtopt;
|
---|
359 |
|
---|
360 | // -- onePerQuery EndResults integer
|
---|
361 | filtopt.clear();
|
---|
362 | filtopt.name = "EndResults";
|
---|
363 | filtopt.type = FilterOption_t::integert;
|
---|
364 | filtopt.repeatable = FilterOption_t::onePerQuery;
|
---|
365 | filtopt.defaultValue = "10";
|
---|
366 | filtopt.validValues.push_back("1");
|
---|
367 | filtopt.validValues.push_back("1000");
|
---|
368 | filterOptions["EndResults"] = filtopt;
|
---|
369 |
|
---|
370 | // -- onePerQuery QueryType enumerated (boolean, ranked)
|
---|
371 | filtopt.clear();
|
---|
372 | filtopt.name = "QueryType";
|
---|
373 | filtopt.type = FilterOption_t::enumeratedt;
|
---|
374 | filtopt.repeatable = FilterOption_t::onePerQuery;
|
---|
375 | filtopt.defaultValue = "ranked";
|
---|
376 | filtopt.validValues.push_back("boolean");
|
---|
377 | filtopt.validValues.push_back("ranked");
|
---|
378 | filterOptions["QueryType"] = filtopt;
|
---|
379 |
|
---|
380 | // -- onePerTerm Term string ???
|
---|
381 | filtopt.clear();
|
---|
382 | filtopt.name = "Term";
|
---|
383 | filtopt.type = FilterOption_t::stringt;
|
---|
384 | filtopt.repeatable = FilterOption_t::onePerTerm;
|
---|
385 | filtopt.defaultValue = "";
|
---|
386 | filterOptions["Term"] = filtopt;
|
---|
387 |
|
---|
388 | // -- onePerTerm Casefold boolean
|
---|
389 | filtopt.clear();
|
---|
390 | filtopt.name = "Casefold";
|
---|
391 | filtopt.type = FilterOption_t::booleant;
|
---|
392 | filtopt.repeatable = FilterOption_t::onePerTerm;
|
---|
393 | filtopt.defaultValue = "true";
|
---|
394 | filtopt.validValues.push_back("false");
|
---|
395 | filtopt.validValues.push_back("true");
|
---|
396 | filterOptions["Casefold"] = filtopt;
|
---|
397 |
|
---|
398 | // -- onePerTerm Stem boolean
|
---|
399 | filtopt.clear();
|
---|
400 | filtopt.name = "Stem";
|
---|
401 | filtopt.type = FilterOption_t::booleant;
|
---|
402 | filtopt.repeatable = FilterOption_t::onePerTerm;
|
---|
403 | filtopt.defaultValue = "false";
|
---|
404 | filtopt.validValues.push_back("false");
|
---|
405 | filtopt.validValues.push_back("true");
|
---|
406 | filterOptions["Stem"] = filtopt;
|
---|
407 |
|
---|
408 | // -- onePerTerm Index enumerated
|
---|
409 | filtopt.clear();
|
---|
410 | filtopt.name = "Index";
|
---|
411 | filtopt.type = FilterOption_t::enumeratedt;
|
---|
412 | filtopt.repeatable = FilterOption_t::onePerTerm;
|
---|
413 | filtopt.defaultValue = "";
|
---|
414 | filterOptions["Index"] = filtopt;
|
---|
415 |
|
---|
416 | // -- onePerTerm Subcollection enumerated
|
---|
417 | filtopt.clear();
|
---|
418 | filtopt.name = "Subcollection";
|
---|
419 | filtopt.type = FilterOption_t::enumeratedt;
|
---|
420 | filtopt.repeatable = FilterOption_t::onePerTerm;
|
---|
421 | filtopt.defaultValue = "";
|
---|
422 | filterOptions["Subcollection"] = filtopt;
|
---|
423 |
|
---|
424 | // -- onePerTerm Language enumerated
|
---|
425 | filtopt.clear();
|
---|
426 | filtopt.name = "Language";
|
---|
427 | filtopt.type = FilterOption_t::enumeratedt;
|
---|
428 | filtopt.repeatable = FilterOption_t::onePerTerm;
|
---|
429 | filtopt.defaultValue = "";
|
---|
430 | filterOptions["Language"] = filtopt;
|
---|
431 | }
|
---|
432 |
|
---|
433 | queryfilterclass::~queryfilterclass () {
|
---|
434 | }
|
---|
435 |
|
---|
436 | void queryfilterclass::configure (const text_t &key, const text_tarray &cfgline) {
|
---|
437 | filterclass::configure (key, cfgline);
|
---|
438 |
|
---|
439 | if (key == "indexmap") {
|
---|
440 | indexmap.importmap (cfgline);
|
---|
441 |
|
---|
442 | // update the list of indexes in the filter information
|
---|
443 | text_tarray options;
|
---|
444 | indexmap.gettoarray (options);
|
---|
445 | filterOptions["Index"].validValues = options;
|
---|
446 |
|
---|
447 | } else if (key == "defaultindex") {
|
---|
448 | indexmap.from2to (cfgline[0], filterOptions["Index"].defaultValue);
|
---|
449 |
|
---|
450 | } else if (key == "subcollectionmap") {
|
---|
451 | subcollectionmap.importmap (cfgline);
|
---|
452 |
|
---|
453 | // update the list of subcollections in the filter information
|
---|
454 | text_tarray options;
|
---|
455 | subcollectionmap.gettoarray (options);
|
---|
456 | filterOptions["Subcollection"].validValues = options;
|
---|
457 |
|
---|
458 | } else if (key == "defaultsubcollection") {
|
---|
459 | subcollectionmap.from2to (cfgline[0], filterOptions["Subcollection"].defaultValue);
|
---|
460 |
|
---|
461 | } else if (key == "languagemap") {
|
---|
462 | languagemap.importmap (cfgline);
|
---|
463 |
|
---|
464 | // update the list of languages in the filter information
|
---|
465 | text_tarray options;
|
---|
466 | languagemap.gettoarray (options);
|
---|
467 | filterOptions["Language"].validValues = options;
|
---|
468 |
|
---|
469 | } else if (key == "defaultlanguage")
|
---|
470 | languagemap.from2to (cfgline[0], filterOptions["Language"].defaultValue);
|
---|
471 | }
|
---|
472 |
|
---|
473 | bool queryfilterclass::init (ostream &logout) {
|
---|
474 | outconvertclass text_t2ascii;
|
---|
475 |
|
---|
476 | if (!filterclass::init(logout)) return false;
|
---|
477 |
|
---|
478 | // get the filename for the database and make sure it exists
|
---|
479 | gdbm_filename = filename_cat(collectdir,"index","text",collection);
|
---|
480 | #ifdef _LITTLE_ENDIAN
|
---|
481 | gdbm_filename += ".ldb";
|
---|
482 | #else
|
---|
483 | gdbm_filename += ".bdb";
|
---|
484 | #endif
|
---|
485 | if (!file_exists(gdbm_filename)) {
|
---|
486 | logout << text_t2ascii
|
---|
487 | << "error: gdbm database \""
|
---|
488 | << gdbm_filename << "\" does not exist\n\n";
|
---|
489 | return false;
|
---|
490 | }
|
---|
491 |
|
---|
492 | return true;
|
---|
493 | }
|
---|
494 |
|
---|
495 | void queryfilterclass::filter (const FilterRequest_t &request,
|
---|
496 | FilterResponse_t &response,
|
---|
497 | comerror_t &err, ostream &logout) {
|
---|
498 | outconvertclass text_t2ascii;
|
---|
499 |
|
---|
500 | response.clear ();
|
---|
501 | err = noError;
|
---|
502 | if (gdbmptr == NULL) {
|
---|
503 | // most likely a configuration problem
|
---|
504 | logout << text_t2ascii
|
---|
505 | << "configuration error: queryfilter contains a null gdbmclass\n\n";
|
---|
506 | err = configurationError;
|
---|
507 | return;
|
---|
508 | }
|
---|
509 | if (mgsearchptr == NULL) {
|
---|
510 | // most likely a configuration problem
|
---|
511 | logout << text_t2ascii
|
---|
512 | << "configuration error: queryfilter contains a null mgsearchclass\n\n";
|
---|
513 | err = configurationError;
|
---|
514 | return;
|
---|
515 | }
|
---|
516 |
|
---|
517 | // open the database
|
---|
518 | gdbmptr->setlogout(&logout);
|
---|
519 | if (!gdbmptr->opendatabase (gdbm_filename)) {
|
---|
520 | // most likely a system problem (we have already checked that the
|
---|
521 | // gdbm database exists)
|
---|
522 | logout << text_t2ascii
|
---|
523 | << "system problem: open on gdbm database \""
|
---|
524 | << gdbm_filename << "\" failed\n\n";
|
---|
525 | err = systemProblem;
|
---|
526 | return;
|
---|
527 | }
|
---|
528 |
|
---|
529 | // get the query parameters
|
---|
530 | int startresults = filterOptions["StartResults"].defaultValue.getint();
|
---|
531 | int endresults = filterOptions["EndResults"].defaultValue.getint();
|
---|
532 | vector<queryparamclass> queryfilterparams;
|
---|
533 | parse_query_params (request, queryfilterparams, startresults, endresults, logout);
|
---|
534 |
|
---|
535 | // do query
|
---|
536 | queryresultsclass queryresults;
|
---|
537 | do_multi_query (request, queryfilterparams, queryresults, err, logout);
|
---|
538 | if (err != noError) return;
|
---|
539 |
|
---|
540 | // assemble document results
|
---|
541 | if (need_matching_docs (request.filterResultOptions)) {
|
---|
542 | // sort the query results
|
---|
543 | sort_doc_results (request, queryresults.docs);
|
---|
544 |
|
---|
545 | int resultnum = 1;
|
---|
546 | ResultDocInfo_t resultdoc;
|
---|
547 | text_t trans_OID;
|
---|
548 | vector<int>::iterator docorder_here = queryresults.docs.docorder.begin();
|
---|
549 | vector<int>::iterator docorder_end = queryresults.docs.docorder.end();
|
---|
550 |
|
---|
551 | while (docorder_here != docorder_end) {
|
---|
552 | if (resultnum > endresults) break;
|
---|
553 |
|
---|
554 | // translate the document number
|
---|
555 | if (!translate(gdbmptr, *docorder_here, trans_OID)) {
|
---|
556 | logout << text_t2ascii
|
---|
557 | << "warning: could not translate mg document number \""
|
---|
558 | << *docorder_here << "\"to OID.\n\n";
|
---|
559 |
|
---|
560 | } else {
|
---|
561 | docresultmap::iterator docset_here = queryresults.docs.docset.find (*docorder_here);
|
---|
562 |
|
---|
563 | // see if there is a result for this number,
|
---|
564 | // if it is in the request set (or the request set is empty)
|
---|
565 | if (docset_here != queryresults.docs.docset.end() &&
|
---|
566 | (request.docSet.empty() || in_set(request.docSet, trans_OID))) {
|
---|
567 | if (resultnum >= startresults) {
|
---|
568 | // add this document
|
---|
569 | resultdoc.OID = trans_OID;
|
---|
570 | resultdoc.result_num = resultnum;
|
---|
571 | resultdoc.ranking = (int)((*docset_here).second.docweight * 10000.0 + 0.5);
|
---|
572 |
|
---|
573 | // these next two are not available on all versions of mg
|
---|
574 | resultdoc.num_terms_matched = (*docset_here).second.num_query_terms_matched;
|
---|
575 | resultdoc.num_phrase_match = (*docset_here).second.num_phrase_match;
|
---|
576 |
|
---|
577 | response.docInfo.push_back (resultdoc);
|
---|
578 | }
|
---|
579 |
|
---|
580 | resultnum++;
|
---|
581 | }
|
---|
582 | }
|
---|
583 |
|
---|
584 | docorder_here++;
|
---|
585 | }
|
---|
586 | }
|
---|
587 |
|
---|
588 | // assemble the term results
|
---|
589 | if (need_term_info(request.filterResultOptions)) {
|
---|
590 | // note: the terms have already been sorted and uniqued
|
---|
591 |
|
---|
592 | TermInfo_t terminfo;
|
---|
593 | bool terms_first = true;
|
---|
594 | vector<termfreqclass>::iterator terms_here = queryresults.terms.begin();
|
---|
595 | vector<termfreqclass>::iterator terms_end = queryresults.terms.end();
|
---|
596 |
|
---|
597 | while (terms_here != terms_end) {
|
---|
598 | terminfo.clear();
|
---|
599 | terminfo.term = (*terms_here).termstr;
|
---|
600 | terminfo.freq = (*terms_here).termfreq;
|
---|
601 | if (terms_first) {
|
---|
602 | text_tset::iterator termvariants_here = queryresults.termvariants.begin();
|
---|
603 | text_tset::iterator termvariants_end = queryresults.termvariants.end();
|
---|
604 | while (termvariants_here != termvariants_end) {
|
---|
605 | terminfo.matchTerms.push_back (*termvariants_here);
|
---|
606 | termvariants_here++;
|
---|
607 | }
|
---|
608 | }
|
---|
609 | terms_first = false;
|
---|
610 |
|
---|
611 | response.termInfo.push_back (terminfo);
|
---|
612 |
|
---|
613 | terms_here++;
|
---|
614 | }
|
---|
615 | }
|
---|
616 |
|
---|
617 | response.numDocs = queryresults.docs_matched;
|
---|
618 | response.isApprox = queryresults.is_approx;
|
---|
619 | }
|
---|