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1: /**
2: * Copyright (C) 2016 Czech Technical University in Prague
3: *
4: * This program is free software: you can redistribute it and/or modify it under
5: * the terms of the GNU General Public License as published by the Free Software
6: * Foundation, either version 3 of the License, or (at your option) any
7: * later version.
8: *
9: * This program is distributed in the hope that it will be useful, but WITHOUT
10: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11: * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
12: * details. You should have received a copy of the GNU General Public License
13: * along with this program. If not, see <http://www.gnu.org/licenses/>.
14: */
15: package cz.cvut.kbss.jopa.model;
16:
17: import java.util.ArrayList;
18: import java.util.List;
19:
20: public class PersistenceProviderResolverHolder {
21:
22: private static PersistenceProviderResolver instance = null;
23:
24: private PersistenceProviderResolverHolder() {
25: throw new AssertionError();
26: }
27:
28: public static synchronized PersistenceProviderResolver getPersistenceProviderResolver() {
29: if (instance == null) {
30: instance = new PersistenceProviderResolver() {
31:
32: // TODO
33: private List<PersistenceProvider> pp = new ArrayList<>();
34:
35: @Override
36: public void clearCachedProviders() {
37: pp.clear();
38: }
39:
40: @Override
41: public List<PersistenceProvider> getPersistenceProviders() {
42: return pp;
43: }
44: };
45: }
46:
47: return instance;
48: }
49:
50: public static synchronized void setPersistenceProviderResolver(
51: final PersistenceProviderResolver ppr) {
52: instance = ppr;
53: }
54: }