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1   /* This file is part of COPAL (COntext Provisioning for All).
2    *
3    * COPAL is a part of SM4All (Smart hoMes for All) project.
4    *
5    * COPAL is free software: you can redistribute it and/or modify
6    * it under the terms of the GNU Lesser General Public License as published by
7    * the Free Software Foundation, either version 3 of the License, or
8    * (at your option) any later version.
9    *
10   * COPAL 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
13   * GNU Lesser General Public License for more details.
14   *
15   * You should have received a copy of the GNU Lesser General Public License
16   * along with COPAL. If not, see <http://www.gnu.org/licenses/>.
17   */
18  package at.ac.tuwien.infosys.sm4all.copal.rest.provider;
19  
20  import java.util.concurrent.atomic.AtomicReference;
21  import javax.ws.rs.ext.MessageBodyReader;
22  import org.w3c.dom.Element;
23  import at.ac.tuwien.infosys.sm4all.copal.api.query.ProcessedEventQuery;
24  import at.ac.tuwien.infosys.sm4all.copal.api.query.xml.ProcessedEventQueryUnmarshaller;
25  import at.ac.tuwien.infosys.sm4all.copal.api.service.ContextQueryFactory;
26  import at.ac.tuwien.infosys.sm4all.copal.api.util.FailedUnmarshallingException;
27  
28  /**
29   * A {@link ProcessedEventQuery} {@link XMLReader}.
30   * 
31   * @author sanjin
32   */
33  @SuppressWarnings("unused")
34  public class XMLProcessedEventQueryReader extends
35          XMLReader<ProcessedEventQuery> implements
36          MessageBodyReader<ProcessedEventQuery> {
37  
38      private static final AtomicReference<ProcessedEventQueryUnmarshaller.Builder> BUILDER = new AtomicReference<ProcessedEventQueryUnmarshaller.Builder>();
39  
40      /**
41       * Creates instance of {@link ProcessedEventQuery} {@link XMLReader}.
42       */
43      public XMLProcessedEventQueryReader() {
44          super(ProcessedEventQuery.class);
45      }
46  
47      /**
48       * Returns the {@link ContextQueryFactory} all instances of
49       * {@link XMLProcessedEventQueryReader} are using.
50       * 
51       * @return the {@link ContextQueryFactory} all instances of
52       *         {@link XMLProcessedEventQueryReader} are using.
53       */
54      public static ContextQueryFactory getFactory() {
55          return BUILDER.get().getFactory();
56      }
57  
58      /**
59       * Sets the {@link ContextQueryFactory} all instances of
60       * {@link XMLProcessedEventQueryReader} should use.
61       * 
62       * @param factory the {@link ContextQueryFactory}.
63       */
64      public static void setFactory(final ContextQueryFactory factory) {
65          BUILDER.set(new ProcessedEventQueryUnmarshaller.Builder().withFactory(factory));
66      }
67  
68      @Override
69      protected ProcessedEventQuery unmarshal(final Element element)
70              throws FailedUnmarshallingException {
71          return BUILDER.get().withElement(element).build().unmarshal();
72      }
73  }