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#289: better search parsing (including wildcard and fuzzy)

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This commit is contained in:
Benjamin Gamard 2019-01-24 17:26:46 +01:00
parent 10d5c4334b
commit 6e56a0f568
2 changed files with 29 additions and 19 deletions
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47
docs-core/src/main/java/com/sismics/docs/core/util/indexing/LuceneIndexingHandler.java
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@ -25,8 +25,7 @@ import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.*;
import org.apache.lucene.queryparser.flexible.standard.QueryParserUtil;
import org.apache.lucene.queryparser.flexible.standard.StandardQueryParser;
import org.apache.lucene.queryparser.simple.SimpleQueryParser;
import org.apache.lucene.search.*;
import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.QueryScorer;
@ -371,29 +370,26 @@ public class LuceneIndexingHandler implements IndexingHandler {
* @throws Exception e
*/
private Map<String, String> search(String searchQuery, String fullSearchQuery) throws Exception {
// Escape query and add quotes so QueryParser generate a PhraseQuery
String escapedSearchQuery = "\"" + QueryParserUtil.escape(searchQuery + " " + fullSearchQuery) + "\"";
String escapedFullSearchQuery = "\"" + QueryParserUtil.escape(fullSearchQuery) + "\"";
// The fulltext query searches in all fields
searchQuery = searchQuery + " " + fullSearchQuery;
// Build search query
Analyzer analyzer = new StandardAnalyzer();
StandardQueryParser qpHelper = new StandardQueryParser(analyzer);
qpHelper.setPhraseSlop(100); // PhraseQuery add terms
// Search on documents and files
BooleanQuery query = new BooleanQuery.Builder()
.add(qpHelper.parse(escapedSearchQuery, "title"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "description"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "subject"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "identifier"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "publisher"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "format"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "source"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "type"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "coverage"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "rights"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedSearchQuery, "filename"), BooleanClause.Occur.SHOULD)
.add(qpHelper.parse(escapedFullSearchQuery, "content"), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "title").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "description").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "subject").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "identifier").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "publisher").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "format").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "source").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "type").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "coverage").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "rights").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "filename").parse(searchQuery), BooleanClause.Occur.SHOULD)
.add(buildQueryParser(analyzer, "content").parse(fullSearchQuery), BooleanClause.Occur.SHOULD)
.build();
// Search
@ -435,6 +431,19 @@ public class LuceneIndexingHandler implements IndexingHandler {
return documentMap;
}
/**
* Build a query parser for searching.
*
* @param analyzer Analyzer
* @param field Field
* @return Query parser
*/
private SimpleQueryParser buildQueryParser(Analyzer analyzer, String field) {
SimpleQueryParser simpleQueryParser = new SimpleQueryParser(analyzer, field);
simpleQueryParser.setDefaultOperator(BooleanClause.Occur.MUST); // AND all the terms
return simpleQueryParser;
}
/**
* Build Lucene document from database document.
*

1
docs-web/src/test/java/com/sismics/docs/rest/TestDocumentResource.java
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@ -184,6 +184,7 @@ public class TestDocumentResource extends BaseJerseyTest {
// Search documents
Assert.assertEquals(1, searchDocuments("full:uranium full:einstein", document1Token));
Assert.assertEquals(2, searchDocuments("tit*", document1Token));
Assert.assertEquals(2, searchDocuments("full:title", document1Token));
Assert.assertEquals(2, searchDocuments("title", document1Token));
Assert.assertEquals(1, searchDocuments("super description", document1Token));