1 | /** |
---|
2 | * This software is copyright (c) 2012 by - Institut fuer Deutsche Sprache |
---|
3 | * (http://www.ids-mannheim.de), Seminar fuer Sprachwissenschaft |
---|
4 | * (http://www.sfs.uni-tuebingen.de/) This is free software. You can |
---|
5 | * redistribute it and/or modify it under the terms described in the GNU General |
---|
6 | * Public License v3 of which you should have received a copy. Otherwise you can |
---|
7 | * download it from |
---|
8 | * |
---|
9 | * http://www.gnu.org/licenses/gpl-3.0.txt |
---|
10 | * |
---|
11 | * @copyright Seminar fuer Sprachwissenschaft (http://www.sfs.uni-tuebingen.de/) |
---|
12 | * |
---|
13 | * @license http://www.gnu.org/licenses/gpl-3.0.txt GNU General Public License |
---|
14 | * v3 |
---|
15 | */ |
---|
16 | package eu.clarin.sru.cqibridge; |
---|
17 | |
---|
18 | import eu.clarin.cqi.client.CqiClient; |
---|
19 | import eu.clarin.cqi.client.CqiClientException; |
---|
20 | import eu.clarin.cqi.client.CqiResult; |
---|
21 | import eu.clarin.sru.server.*; |
---|
22 | import eu.clarin.sru.server.utils.SRUSearchEngineBase; |
---|
23 | import java.util.Arrays; |
---|
24 | import java.util.Map; |
---|
25 | import java.util.NoSuchElementException; |
---|
26 | import java.util.Vector; |
---|
27 | import java.util.regex.Pattern; |
---|
28 | import javax.xml.stream.XMLStreamException; |
---|
29 | import javax.xml.stream.XMLStreamWriter; |
---|
30 | import org.slf4j.Logger; |
---|
31 | import org.slf4j.LoggerFactory; |
---|
32 | import org.z3950.zing.cql.CQLNode; |
---|
33 | import org.z3950.zing.cql.CQLRelation; |
---|
34 | import org.z3950.zing.cql.CQLTermNode; |
---|
35 | import org.z3950.zing.cql.Modifier; |
---|
36 | |
---|
37 | /** |
---|
38 | * |
---|
39 | * @author akislev |
---|
40 | */ |
---|
41 | public class CqiSRUSearchEngine extends SRUSearchEngineBase { |
---|
42 | |
---|
43 | private static final String PARAM_CQI_SERVER_HOST = "cqi.serverHost"; |
---|
44 | private static final String PARAM_CQI_SERVER_PORT = "cqi.serverPort"; |
---|
45 | private static final String PARAM_CQI_SERVER_USERNAME = "cqi.serverUsername"; |
---|
46 | private static final String PARAM_CQI_SERVER_PASSWORD = "cqi.serverPassword"; |
---|
47 | private static final String PARAM_CQI_DEFAULT_CORPUS = "cqi.defaultCorpus"; |
---|
48 | private static final String PARAM_CQI_DEFAULT_CORPUS_PID = "cqi.defaultCorpusPID"; |
---|
49 | private static final String PARAM_CQI_DEFAULT_CORPUS_REF = "cqi.defaultCorpusRef"; |
---|
50 | private static final String CQI_SUPPORTED_RELATION_CQL_1_1 = "scr"; |
---|
51 | private static final String CQI_SUPPORTED_RELATION_CQL_1_2 = "="; |
---|
52 | private static final String CQI_SUPPORTED_RELATION_EXACT = "exact"; |
---|
53 | private static final String INDEX_CQL_SERVERCHOICE = "cql.serverChoice"; |
---|
54 | private static final String INDEX_FCS_WORDS = "words"; |
---|
55 | private static final String INDEX_FCS_RESOURCE = "fcs.resource"; |
---|
56 | private static final String FCS_RESOURCE_TERM_WILDCARD = "*"; |
---|
57 | private static final String FCS_RESOURCE_TERM_ANY = "any"; |
---|
58 | private static final String FCS_NS = "http://clarin.eu/fcs/1.0"; |
---|
59 | private static final String FCS_PREFIX = "fcs"; |
---|
60 | private static final String FCS_KWIC_NS = "http://clarin.eu/fcs/1.0/kwic"; |
---|
61 | private static final String FCS_KWIC_PREFIX = "kwic"; |
---|
62 | private static final String CLARIN_FCS_RECORD_SCHEMA = FCS_NS; |
---|
63 | private static final String X_CMD_RESOURCE_INFO = "x-cmd-resource-info"; |
---|
64 | private static final Pattern SPACE_PATTERN = Pattern.compile("\\s+"); |
---|
65 | private static final String WORD_POSITIONAL_ATTRIBUTE = "word"; |
---|
66 | private static final String CONTEXT_STRUCTURAL_ATTRIBUTE = "s"; |
---|
67 | private static final Logger logger = |
---|
68 | LoggerFactory.getLogger(CqiSRUSearchEngine.class); |
---|
69 | private static final ResourceInfo[] RESOURCE_INFOS = new ResourceInfo[]{ |
---|
70 | new ResourceInfo("tueba-ddc", -1, false, |
---|
71 | Arrays.asList("en", "TuebaDDC", |
---|
72 | "de", "TÃŒbaDDC"), |
---|
73 | Arrays.asList("en", "TÃŒbingen Treebank of Written German - Diachronic Corpus.", |
---|
74 | "de", "TÃŒbingen Baumbank des Deutschen - Diachrones Corpus."), |
---|
75 | Arrays.asList("deu"), |
---|
76 | Arrays.asList("text", "fcs.words")),}; |
---|
77 | private CqiClient client; |
---|
78 | private String defaultCorpusName; |
---|
79 | private String defaultCorpusPID; |
---|
80 | private String defaultCorpusRef; |
---|
81 | |
---|
82 | @Override |
---|
83 | public void init(SRUServerConfig config, Map<String, String> params) |
---|
84 | throws SRUConfigException { |
---|
85 | final String serverHost = params.get(PARAM_CQI_SERVER_HOST); |
---|
86 | if (serverHost == null) { |
---|
87 | throw new SRUConfigException("parameter \"" |
---|
88 | + PARAM_CQI_SERVER_HOST + "\" is mandatory"); |
---|
89 | } |
---|
90 | logger.info("using cqi server host: {}", serverHost); |
---|
91 | final String serverPortString = params.get(PARAM_CQI_SERVER_PORT); |
---|
92 | if (serverPortString == null) { |
---|
93 | throw new SRUConfigException("parameter \"" |
---|
94 | + PARAM_CQI_SERVER_PORT + "\" is mandatory"); |
---|
95 | } |
---|
96 | final int serverPort = Integer.parseInt(serverPortString); |
---|
97 | logger.info("using cqi server port: {}", serverPort); |
---|
98 | final String username = params.get(PARAM_CQI_SERVER_USERNAME); |
---|
99 | if (username == null) { |
---|
100 | throw new SRUConfigException("parameter \"" |
---|
101 | + PARAM_CQI_SERVER_USERNAME + "\" is mandatory"); |
---|
102 | } |
---|
103 | final String password = params.get(PARAM_CQI_SERVER_PASSWORD); |
---|
104 | if (password == null) { |
---|
105 | throw new SRUConfigException("parameter \"" |
---|
106 | + PARAM_CQI_SERVER_PASSWORD + "\" is mandatory"); |
---|
107 | } |
---|
108 | defaultCorpusName = params.get(PARAM_CQI_DEFAULT_CORPUS); |
---|
109 | if (defaultCorpusName == null) { |
---|
110 | throw new SRUConfigException("parameter \"" |
---|
111 | + PARAM_CQI_DEFAULT_CORPUS + "\" is mandatory"); |
---|
112 | } |
---|
113 | defaultCorpusPID = params.get(PARAM_CQI_DEFAULT_CORPUS_PID); |
---|
114 | if (defaultCorpusPID == null) { |
---|
115 | throw new SRUConfigException("parameter \"" |
---|
116 | + PARAM_CQI_DEFAULT_CORPUS_PID + "\" is mandatory"); |
---|
117 | } |
---|
118 | defaultCorpusRef = params.get(PARAM_CQI_DEFAULT_CORPUS_REF); |
---|
119 | if (defaultCorpusRef == null) { |
---|
120 | throw new SRUConfigException("parameter \"" |
---|
121 | + PARAM_CQI_DEFAULT_CORPUS_REF + "\" is mandatory"); |
---|
122 | } |
---|
123 | try { |
---|
124 | client = new CqiClient(serverHost, serverPort); |
---|
125 | } catch (CqiClientException ex) { |
---|
126 | throw new SRUConfigException("can't initialize a cqi client", ex); |
---|
127 | } |
---|
128 | try { |
---|
129 | client.connect(username, password); |
---|
130 | } catch (CqiClientException ex) { |
---|
131 | throw new SRUConfigException("can't connect to the cqi server", ex); |
---|
132 | } |
---|
133 | } |
---|
134 | |
---|
135 | @Override |
---|
136 | public SRUExplainResult explain(SRUServerConfig config, |
---|
137 | SRURequest request, SRUDiagnosticList diagnostics) |
---|
138 | throws SRUException { |
---|
139 | return null; |
---|
140 | } |
---|
141 | |
---|
142 | @Override |
---|
143 | public SRUScanResultSet scan(SRUServerConfig config, SRURequest request, |
---|
144 | SRUDiagnosticList diagnostics) throws SRUException { |
---|
145 | /* |
---|
146 | * handle scan on CLARIN FCS fcs.resource; |
---|
147 | * otherwise return an empty scan result set ... |
---|
148 | */ |
---|
149 | final ResourceInfo[] result = |
---|
150 | translateFcsScanResource(request.getScanClause()); |
---|
151 | final boolean provideResourceInfo = (result != null) |
---|
152 | && parseBoolean(request.getExtraRequestData(X_CMD_RESOURCE_INFO)); |
---|
153 | return new SRUScanResultSet(diagnostics) { |
---|
154 | private int idx = -1; |
---|
155 | |
---|
156 | @Override |
---|
157 | public boolean nextTerm() { |
---|
158 | return (result != null) && (++idx < result.length); |
---|
159 | } |
---|
160 | |
---|
161 | @Override |
---|
162 | public String getValue() { |
---|
163 | return result[idx].getCorpusId(); |
---|
164 | } |
---|
165 | |
---|
166 | @Override |
---|
167 | public int getNumberOfRecords() { |
---|
168 | return result[idx].getResourceCount(); |
---|
169 | } |
---|
170 | |
---|
171 | @Override |
---|
172 | public String getDisplayTerm() { |
---|
173 | return null; |
---|
174 | } |
---|
175 | |
---|
176 | @Override |
---|
177 | public SRUScanResultSet.WhereInList getWhereInList() { |
---|
178 | return null; |
---|
179 | } |
---|
180 | |
---|
181 | @Override |
---|
182 | public boolean hasExtraTermData() { |
---|
183 | return provideResourceInfo; |
---|
184 | } |
---|
185 | |
---|
186 | @Override |
---|
187 | public void writeExtraTermData(XMLStreamWriter writer) |
---|
188 | throws XMLStreamException { |
---|
189 | if (provideResourceInfo) { |
---|
190 | result[idx].writeResourceInfo(writer, null); |
---|
191 | } |
---|
192 | } |
---|
193 | }; |
---|
194 | } |
---|
195 | |
---|
196 | @Override |
---|
197 | public SRUSearchResultSet search(SRUServerConfig config, |
---|
198 | SRURequest request, SRUDiagnosticList diagnostics) |
---|
199 | throws SRUException { |
---|
200 | /* |
---|
201 | * sanity check: make sure we are asked to return stuff in CLARIN FCS |
---|
202 | * format if a recordSchema is specified. |
---|
203 | */ |
---|
204 | final String recordSchemaIdentifier = |
---|
205 | request.getRecordSchemaIdentifier(); |
---|
206 | if ((recordSchemaIdentifier != null) |
---|
207 | && !recordSchemaIdentifier.equals(CLARIN_FCS_RECORD_SCHEMA)) { |
---|
208 | throw new SRUException( |
---|
209 | SRUConstants.SRU_UNKNOWN_SCHEMA_FOR_RETRIEVAL, |
---|
210 | recordSchemaIdentifier, "Record schema \"" |
---|
211 | + recordSchemaIdentifier |
---|
212 | + "\" is not supported by this endpoint."); |
---|
213 | } |
---|
214 | |
---|
215 | /* |
---|
216 | * commence search ... |
---|
217 | */ |
---|
218 | final CQLNode query = request.getQuery(); |
---|
219 | int startRecord = request.getStartRecord(); |
---|
220 | final int maximumRecords = request.getMaximumRecords(); |
---|
221 | |
---|
222 | final String cqpQuery = translateCQLtoCQP(query); |
---|
223 | if (startRecord > 0) { |
---|
224 | startRecord--; |
---|
225 | } else if (startRecord == -1) { |
---|
226 | startRecord = 0; |
---|
227 | } |
---|
228 | logger.info("running query = \"{}\", offset = {}, limit = {}", |
---|
229 | new Object[]{cqpQuery, startRecord, maximumRecords}); |
---|
230 | try { |
---|
231 | final CqiResult result = client.query(defaultCorpusName, cqpQuery, CONTEXT_STRUCTURAL_ATTRIBUTE); |
---|
232 | if ((result.size() > 0 && !result.absolute(startRecord)) || (result.size() == 0 && startRecord > 0)) { |
---|
233 | diagnostics.addDiagnostic(SRUConstants.SRU_FIRST_RECORD_POSITION_OUT_OF_RANGE, Integer.toString(startRecord + 1), null); |
---|
234 | } |
---|
235 | |
---|
236 | return new SRUSearchResultSet(diagnostics) { |
---|
237 | private int pos = 0; |
---|
238 | |
---|
239 | @Override |
---|
240 | public int getTotalRecordCount() { |
---|
241 | return result.size(); |
---|
242 | } |
---|
243 | |
---|
244 | @Override |
---|
245 | public int getRecordCount() { |
---|
246 | return result.size(); |
---|
247 | } |
---|
248 | |
---|
249 | @Override |
---|
250 | public String getRecordSchemaIdentifier() { |
---|
251 | return CLARIN_FCS_RECORD_SCHEMA; |
---|
252 | } |
---|
253 | |
---|
254 | @Override |
---|
255 | public String getRecordIdentifier() { |
---|
256 | return null; |
---|
257 | } |
---|
258 | |
---|
259 | @Override |
---|
260 | public boolean nextRecord() { |
---|
261 | try { |
---|
262 | return pos++ < maximumRecords && result.next(); |
---|
263 | } catch (CqiClientException e) { |
---|
264 | throw new NoSuchElementException(e.getMessage()); |
---|
265 | } |
---|
266 | } |
---|
267 | |
---|
268 | @Override |
---|
269 | public SRUDiagnostic getSurrogateDiagnostic() { |
---|
270 | return null; |
---|
271 | } |
---|
272 | |
---|
273 | @Override |
---|
274 | public void writeRecord(XMLStreamWriter writer) |
---|
275 | throws XMLStreamException { |
---|
276 | final int contextStart = result.getContextStart(); |
---|
277 | final int contextEnd = result.getContextEnd(); |
---|
278 | final int matchStart = result.getMatchStart(); |
---|
279 | final int matchEnd = result.getMatchEnd(); |
---|
280 | final int relMatchStart = matchStart - contextStart; |
---|
281 | final int relMatchEnd = matchEnd - contextStart + 1; |
---|
282 | final int relContextEnd = contextEnd - contextStart + 1; |
---|
283 | final StringBuilder leftContext = new StringBuilder(); |
---|
284 | final StringBuilder keyWord = new StringBuilder(); |
---|
285 | final StringBuilder rightContext = new StringBuilder(); |
---|
286 | String[] words; |
---|
287 | try { |
---|
288 | words = result.getValues(WORD_POSITIONAL_ATTRIBUTE, contextStart, contextEnd); |
---|
289 | } catch (CqiClientException e) { |
---|
290 | throw new XMLStreamException("can't obtain the values of the positional attribute '" + WORD_POSITIONAL_ATTRIBUTE + "'", e); |
---|
291 | } |
---|
292 | boolean isFirst = true; |
---|
293 | for (int i = 0; i < relMatchStart; i++) { |
---|
294 | if (isFirst) { |
---|
295 | isFirst = false; |
---|
296 | } else { |
---|
297 | leftContext.append(' '); |
---|
298 | } |
---|
299 | leftContext.append(words[i]); |
---|
300 | } |
---|
301 | isFirst = true; |
---|
302 | for (int i = relMatchStart; i < relMatchEnd; i++) { |
---|
303 | if (isFirst) { |
---|
304 | isFirst = false; |
---|
305 | } else { |
---|
306 | keyWord.append(' '); |
---|
307 | } |
---|
308 | keyWord.append(words[i]); |
---|
309 | } |
---|
310 | isFirst = true; |
---|
311 | for (int i = relMatchEnd; i < relContextEnd; i++) { |
---|
312 | if (isFirst) { |
---|
313 | isFirst = false; |
---|
314 | } else { |
---|
315 | rightContext.append(' '); |
---|
316 | } |
---|
317 | rightContext.append(words[i]); |
---|
318 | } |
---|
319 | writer.setPrefix(FCS_PREFIX, FCS_NS); |
---|
320 | writer.writeStartElement(FCS_NS, "Resource"); |
---|
321 | writer.writeNamespace(FCS_PREFIX, FCS_NS); |
---|
322 | writer.writeAttribute("pid", defaultCorpusPID); |
---|
323 | writer.writeAttribute("ref", defaultCorpusRef); |
---|
324 | writer.writeStartElement(FCS_NS, "DataView"); |
---|
325 | writer.writeAttribute("type", "kwic"); |
---|
326 | |
---|
327 | writer.setPrefix(FCS_KWIC_PREFIX, FCS_KWIC_NS); |
---|
328 | writer.writeStartElement(FCS_KWIC_NS, "kwic"); |
---|
329 | writer.writeNamespace(FCS_KWIC_PREFIX, FCS_KWIC_NS); |
---|
330 | |
---|
331 | writer.writeStartElement(FCS_KWIC_NS, "c"); |
---|
332 | writer.writeAttribute("type", "left"); |
---|
333 | writer.writeCharacters(leftContext.toString()); |
---|
334 | writer.writeEndElement(); // "c" element |
---|
335 | |
---|
336 | writer.writeStartElement(FCS_KWIC_NS, "kw"); |
---|
337 | writer.writeCharacters(keyWord.toString()); |
---|
338 | writer.writeEndElement(); // "kw" element |
---|
339 | |
---|
340 | writer.writeStartElement(FCS_KWIC_NS, "c"); |
---|
341 | writer.writeAttribute("type", "right"); |
---|
342 | writer.writeCharacters(rightContext.toString()); |
---|
343 | writer.writeEndElement(); // "c" element |
---|
344 | |
---|
345 | writer.writeEndElement(); // "kwic" element |
---|
346 | |
---|
347 | writer.writeEndElement(); // "DataView" element |
---|
348 | writer.writeEndElement(); // "Resource" element |
---|
349 | } |
---|
350 | }; |
---|
351 | } catch (CqiClientException e) { |
---|
352 | logger.error("error processing query", e); |
---|
353 | throw new SRUException( |
---|
354 | SRUConstants.SRU_CANNOT_PROCESS_QUERY_REASON_UNKNOWN, |
---|
355 | "Error processing query (" + e.getMessage() + ").", e); |
---|
356 | } |
---|
357 | } |
---|
358 | |
---|
359 | private ResourceInfo[] translateFcsScanResource(CQLNode query) |
---|
360 | throws SRUException { |
---|
361 | if (query instanceof CQLTermNode) { |
---|
362 | final CQLTermNode root = (CQLTermNode) query; |
---|
363 | logger.debug("index = '{}', relation = '{}', term = '{}'", |
---|
364 | new Object[]{root.getIndex(), |
---|
365 | root.getRelation().getBase(), root.getTerm()}); |
---|
366 | |
---|
367 | String index = root.getIndex(); |
---|
368 | if (!(INDEX_FCS_RESOURCE.equals(index) || INDEX_CQL_SERVERCHOICE.equals(index))) { |
---|
369 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_INDEX, |
---|
370 | root.getIndex(), "Index \"" + root.getIndex() |
---|
371 | + "\" is not supported in scan operation."); |
---|
372 | } |
---|
373 | |
---|
374 | |
---|
375 | // only allow "=" relation without any modifiers |
---|
376 | final CQLRelation relationNode = root.getRelation(); |
---|
377 | String relation = relationNode.getBase(); |
---|
378 | if (!(CQI_SUPPORTED_RELATION_CQL_1_1.equals(relation) |
---|
379 | || CQI_SUPPORTED_RELATION_CQL_1_2.equals(relation) |
---|
380 | || CQI_SUPPORTED_RELATION_EXACT.equals(relation))) { |
---|
381 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_RELATION, |
---|
382 | relationNode.getBase(), "Relation \"" |
---|
383 | + relationNode.getBase() |
---|
384 | + "\" is not supported in scan operation."); |
---|
385 | } |
---|
386 | Vector<Modifier> modifiers = relationNode.getModifiers(); |
---|
387 | if ((modifiers != null) && !modifiers.isEmpty()) { |
---|
388 | Modifier modifier = modifiers.get(0); |
---|
389 | throw new SRUException( |
---|
390 | SRUConstants.SRU_UNSUPPORTED_RELATION_MODIFIER, |
---|
391 | modifier.getValue(), "Relation modifier \"" |
---|
392 | + modifier.getValue() |
---|
393 | + "\" is not supported in scan operation."); |
---|
394 | } |
---|
395 | |
---|
396 | String term = root.getTerm(); |
---|
397 | if ((term == null) || term.isEmpty()) { |
---|
398 | throw new SRUException(SRUConstants.SRU_EMPTY_TERM_UNSUPPORTED, |
---|
399 | "An empty term is not supported in scan operation."); |
---|
400 | } |
---|
401 | |
---|
402 | /* |
---|
403 | * generate result: currently we only have a flat hierarchy, so |
---|
404 | * return an empty result on any attempt to do a recursive scan ... |
---|
405 | */ |
---|
406 | if ((INDEX_CQL_SERVERCHOICE.equals(index) |
---|
407 | && INDEX_FCS_RESOURCE.equals(term)) |
---|
408 | || (INDEX_FCS_RESOURCE.equals(index) |
---|
409 | && (FCS_RESOURCE_TERM_WILDCARD.equals(term) |
---|
410 | || FCS_RESOURCE_TERM_ANY.equalsIgnoreCase(term)))) { |
---|
411 | return RESOURCE_INFOS; |
---|
412 | } else { |
---|
413 | return null; |
---|
414 | } |
---|
415 | } else { |
---|
416 | throw new SRUException(SRUConstants.SRU_QUERY_FEATURE_UNSUPPORTED, |
---|
417 | "Scan clause too complex."); |
---|
418 | } |
---|
419 | } |
---|
420 | |
---|
421 | private String translateCQLtoCQP(CQLNode query) throws SRUException { |
---|
422 | if (query instanceof CQLTermNode) { |
---|
423 | final CQLTermNode root = (CQLTermNode) query; |
---|
424 | |
---|
425 | // only allow "cql.serverChoice" and "words" index |
---|
426 | if (!(INDEX_CQL_SERVERCHOICE.equals(root.getIndex()) |
---|
427 | || INDEX_FCS_WORDS.equals(root.getIndex()))) { |
---|
428 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_INDEX, |
---|
429 | root.getIndex(), "Index \"" + root.getIndex() |
---|
430 | + "\" is not supported."); |
---|
431 | } |
---|
432 | |
---|
433 | // only allow "=" relation without any modifiers |
---|
434 | final CQLRelation relation = root.getRelation(); |
---|
435 | final String baseRel = relation.getBase(); |
---|
436 | if (!(CQI_SUPPORTED_RELATION_CQL_1_1.equals(baseRel) |
---|
437 | || CQI_SUPPORTED_RELATION_CQL_1_2.equals(baseRel) |
---|
438 | || CQI_SUPPORTED_RELATION_EXACT.equals(baseRel))) { |
---|
439 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_RELATION, |
---|
440 | relation.getBase(), "Relation \"" |
---|
441 | + relation.getBase() + "\" is not supported."); |
---|
442 | } |
---|
443 | Vector<Modifier> modifiers = relation.getModifiers(); |
---|
444 | if ((modifiers != null) && !modifiers.isEmpty()) { |
---|
445 | Modifier modifier = modifiers.get(0); |
---|
446 | throw new SRUException( |
---|
447 | SRUConstants.SRU_UNSUPPORTED_RELATION_MODIFIER, |
---|
448 | modifier.getValue(), "Relation modifier \"" |
---|
449 | + modifier.getValue() + "\" is not supported."); |
---|
450 | } |
---|
451 | |
---|
452 | // check term |
---|
453 | final String term = root.getTerm(); |
---|
454 | if ((term == null) || term.isEmpty()) { |
---|
455 | throw new SRUException(SRUConstants.SRU_EMPTY_TERM_UNSUPPORTED, |
---|
456 | "An empty term is not supported."); |
---|
457 | } |
---|
458 | //convert to cqp by inserting quotes around each token |
---|
459 | return String.format("\"%s\"", SPACE_PATTERN.matcher(term).replaceAll("\" \"")); |
---|
460 | |
---|
461 | } |
---|
462 | throw new SRUException(SRUConstants.SRU_QUERY_FEATURE_UNSUPPORTED, |
---|
463 | "Server currently supportes term-only query " |
---|
464 | + "(CQL conformance level 0)."); |
---|
465 | } |
---|
466 | |
---|
467 | private boolean parseBoolean(String value) { |
---|
468 | if (value != null) { |
---|
469 | return value.endsWith("1") || Boolean.parseBoolean(value); |
---|
470 | } |
---|
471 | return false; |
---|
472 | } |
---|
473 | } |
---|