Examples with QueryParser org.apache.lucene.queryparser.classic.QueryParser used on opensource projects

Example 56 with QueryParser

use of org.apache.lucene.queryparser.classic.QueryParser in project orientdb by orientechnologies.

the class OLuceneIndexType method getQueryParser.

protected static Query getQueryParser(OIndexDefinition index, String key, Analyzer analyzer) throws ParseException {
    QueryParser queryParser;
    if ((key).startsWith("(")) {
        queryParser = new QueryParser("", analyzer);
    } else {
        String[] fields = null;
        if (index.isAutomatic()) {
            fields = index.getFields().toArray(new String[index.getFields().size()]);
        } else {
            int length = index.getTypes().length;
            fields = new String[length];
            for (int i = 0; i < length; i++) {
                fields[i] = "k" + i;
            }
        }
        queryParser = new MultiFieldQueryParser(fields, analyzer);
    }
    return queryParser.parse(key);
}

Example 57 with QueryParser

use of org.apache.lucene.queryparser.classic.QueryParser in project orientdb by orientechnologies.

the class VertexIndexTest method testSpacesInQuery.

@Test
public void testSpacesInQuery() throws IOException, ParseException {
    IndexWriterConfig conf = new IndexWriterConfig(new StandardAnalyzer());
    final RAMDirectory directory = new RAMDirectory();
    final IndexWriter writer = new IndexWriter(directory, conf);
    Document doc = new Document();
    doc.add(new TextField("name", "Max Water", Field.Store.YES));
    writer.addDocument(doc);
    doc = new Document();
    doc.add(new TextField("name", "Max Waterson", Field.Store.YES));
    writer.addDocument(doc);
    doc = new Document();
    doc.add(new TextField("name", "Cory Watney", Field.Store.YES));
    writer.addDocument(doc);
    writer.commit();
    IndexReader reader = DirectoryReader.open(directory);
    IndexSearcher searcher = new IndexSearcher(reader);
    Analyzer analyzer = new StandardAnalyzer();
    QueryParser queryParser = new QueryParser("name", analyzer);
    final Query query = queryParser.parse("name:Max AND name:Wat*");
    final TopDocs topDocs = searcher.search(query, 10);
    assertThat(topDocs.totalHits).isEqualTo(2);
    for (int i = 0; i < topDocs.totalHits; i++) {
        final Document found = searcher.doc(topDocs.scoreDocs[i].doc);
        assertThat(found.get("name")).startsWith("Max");
    }
    reader.close();
    writer.close();
}

Example 58 with QueryParser

use of org.apache.lucene.queryparser.classic.QueryParser in project orientdb by orientechnologies.

the class LuceneBooleanIndexTest method testMemoryIndex.

@Test
public void testMemoryIndex() throws ParseException {
    // TODO To be used in evaluate Record
    MemoryIndex index = new MemoryIndex();
    Document doc = new Document();
    doc.add(new StringField("text", "my text", Field.Store.YES));
    StandardAnalyzer analyzer = new StandardAnalyzer();
    for (IndexableField field : doc.getFields()) {
        index.addField(field.name(), field.stringValue(), analyzer);
    }
    QueryParser parser = new QueryParser("text", analyzer);
    float score = index.search(parser.parse("+text:my"));
}

Example 59 with QueryParser

use of org.apache.lucene.queryparser.classic.QueryParser in project neo4j by neo4j.

the class IndexType method query.

Query query(String keyOrNull, Object value, QueryContext contextOrNull) {
    if (value instanceof Query) {
        return (Query) value;
    }
    QueryParser parser = new QueryParser(keyOrNull, analyzer);
    parser.setAllowLeadingWildcard(true);
    parser.setLowercaseExpandedTerms(toLowerCase);
    if (contextOrNull != null && contextOrNull.getDefaultOperator() != null) {
        parser.setDefaultOperator(contextOrNull.getDefaultOperator());
    }
    try {
        return parser.parse(value.toString());
    } catch (ParseException e) {
        throw new RuntimeException(e);
    }
}

Example 60 with QueryParser

use of org.apache.lucene.queryparser.classic.QueryParser in project incubator-atlas by apache.

the class QueryFactory method create.

private QueryExpression create(Request request, ResourceDefinition resourceDefinition) throws InvalidQueryException {
    String queryString;
    if (request.getCardinality() == Request.Cardinality.INSTANCE) {
        String idPropertyName = resourceDefinition.getIdPropertyName();
        queryString = String.format("%s:%s", idPropertyName, request.<String>getProperty(idPropertyName));
    } else {
        queryString = request.getQueryString();
    }
    QueryExpression queryExpression;
    if (queryString != null && !queryString.isEmpty()) {
        QueryParser queryParser = new QueryParser(Version.LUCENE_48, "name", new KeywordAnalyzer());
        queryParser.setLowercaseExpandedTerms(false);
        queryParser.setAllowLeadingWildcard(true);
        Query query;
        try {
            query = queryParser.parse((String) escape(queryString));
        } catch (ParseException e) {
            throw new InvalidQueryException(e.getMessage());
        }
        LOG.info("LuceneQuery: {}", query);
        queryExpression = create(query, resourceDefinition);
    } else {
        queryExpression = new AlwaysQueryExpression();
    }
    // add query properties to request so that they are returned
    request.addAdditionalSelectProperties(queryExpression.getProperties());
    return queryExpression;
}