1 /*
2 * Copyright 2015 Data Archiving and Networked Services (an institute of
3 * Koninklijke Nederlandse Akademie van Wetenschappen), King's College London,
4 * Georg-August-Universitaet Goettingen Stiftung Oeffentlichen Rechts
5 *
6 * Licensed under the EUPL, Version 1.1 or – as soon they will be approved by
7 * the European Commission - subsequent versions of the EUPL (the "Licence");
8 * You may not use this work except in compliance with the Licence.
9 * You may obtain a copy of the Licence at:
10 *
11 * https://joinup.ec.europa.eu/software/page/eupl
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the Licence is distributed on an "AS IS" basis,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the Licence for the specific language governing
17 * permissions and limitations under the Licence.
18 */
19
20 package eu.ehri.project.models.base;
21
22 import com.tinkerpop.blueprints.Direction;
23 import com.tinkerpop.blueprints.Vertex;
24 import com.tinkerpop.frames.Adjacency;
25 import com.tinkerpop.frames.modules.javahandler.JavaHandler;
26 import com.tinkerpop.frames.modules.javahandler.JavaHandlerContext;
27 import eu.ehri.project.models.UserProfile;
28 import eu.ehri.project.models.annotations.Meta;
29
30 import static eu.ehri.project.definitions.Ontology.USER_WATCHING_ITEM;
31
32 /**
33 * An entity that can be watched by users.
34 */
35 public interface Watchable extends Accessible {
36 String WATCHED_COUNT = "watchedBy";
37
38 @Adjacency(label = USER_WATCHING_ITEM, direction = Direction.IN)
39 Iterable<UserProfile> getWatchers();
40
41 @Meta(WATCHED_COUNT)
42 @JavaHandler
43 int getWatchedCount();
44
45 abstract class Impl implements JavaHandlerContext<Vertex>, Watchable {
46
47 @Override
48 public int getWatchedCount() {
49 return Math.toIntExact(gremlin().inE(USER_WATCHING_ITEM).count());
50 }
51 }
52 }