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Package: QueryHints

QueryHints

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QueryHints()
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1: /*
2: * JOPA
3: * Copyright (C) 2024 Czech Technical University in Prague
4: *
5: * This library is free software; you can redistribute it and/or
6: * modify it under the terms of the GNU Lesser General Public
7: * License as published by the Free Software Foundation; either
8: * version 3.0 of the License, or (at your option) any later version.
9: *
10: * This library is distributed in the hope that it will be useful,
11: * but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * Lesser General Public License for more details.
14: *
15: * You should have received a copy of the GNU Lesser General Public
16: * License along with this library.
17: */
18: package cz.cvut.kbss.jopa.query;
19:
20: /**
21: * Defines query hints supported by JOPA.
22: */
23: public class QueryHints {
24:
25: /**
26: * Indicates that inferred results should be omitted from query results.
27: */
28: public static final String DISABLE_INFERENCE = "cz.cvut.kbss.jopa.query.disableInference";
29:
30: /**
31: * Allows to specify the target ontology for query execution.
32: * <p>
33: * By target ontology, it is meant either the shared ontology, which does not contain pending transactional changes,
34: * or the transactional ontology (w.r.t. the persistence context issuing the query), where transactional changes may
35: * influence the query results.
36: * <p>
37: * Note that OntoDriver implementations may choose to ignore the selection depending on their internal transaction
38: * and query execution mechanism.
39: * <p>
40: * Valid values are {@literal CENTRAL} and {@literal TRANSACTIONAL}.
41: */
42: public static final String TARGET_ONTOLOGY = "cz.cvut.kbss.jopa.query.targetOntology";
43:
44: private QueryHints() {
45: throw new AssertionError();
46: }
47: }