Method: setDataset(Dataset)

1: /**
2: * Copyright (C) 2020 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.ontodriver.jena.connector;
16:
17: import cz.cvut.kbss.ontodriver.config.DriverConfiguration;
18: import org.apache.jena.query.Dataset;
19: import org.apache.jena.query.DatasetFactory;
20:
21: import java.util.Objects;
22:
23: /**
24: * Storage accessor using an in-memory dataset.
25: */
26: class MemoryStorage extends Storage {
27:
28: MemoryStorage(DriverConfiguration configuration) {
29: super(configuration);
30: }
31:
32: @Override
33: void initialize() {
34: this.dataset = DatasetFactory.createTxnMem();
35: }
36:
37: @Override
38: void setDataset(Dataset dataset) {
39: Objects.requireNonNull(dataset);
40:• if (!dataset.supportsTransactions()) {
41: throw new IllegalArgumentException("The provided dataset does not support transactions.");
42: }
43: synchronized (this.dataset) {
44:• if (this.dataset.isInTransaction()) {
45: throw new IllegalStateException("Cannot replace dataset when it is in transaction.");
46: }
47: this.dataset = dataset;
48: }
49: }
50: }