diff options
Diffstat (limited to 'store/src/main/java/tools/refinery/data/query/internal/RelationUpdateListener.java')
-rw-r--r-- | store/src/main/java/tools/refinery/data/query/internal/RelationUpdateListener.java | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/store/src/main/java/tools/refinery/data/query/internal/RelationUpdateListener.java b/store/src/main/java/tools/refinery/data/query/internal/RelationUpdateListener.java new file mode 100644 index 00000000..a3b319c8 --- /dev/null +++ b/store/src/main/java/tools/refinery/data/query/internal/RelationUpdateListener.java | |||
@@ -0,0 +1,52 @@ | |||
1 | package tools.refinery.data.query.internal; | ||
2 | |||
3 | import java.util.HashMap; | ||
4 | import java.util.HashSet; | ||
5 | import java.util.Map; | ||
6 | import java.util.Set; | ||
7 | |||
8 | import org.eclipse.viatra.query.runtime.matchers.context.IQueryRuntimeContextListener; | ||
9 | import org.eclipse.viatra.query.runtime.matchers.tuple.ITuple; | ||
10 | |||
11 | import tools.refinery.data.model.Tuple; | ||
12 | import tools.refinery.data.query.view.RelationView; | ||
13 | |||
14 | public class RelationUpdateListener { | ||
15 | private final Map<RelationView<?>,Set<RelationUpdateListenerEntry<?>>> view2Listeners; | ||
16 | |||
17 | public RelationUpdateListener(Set<RelationView<?>> relationViews) { | ||
18 | view2Listeners = new HashMap<>(); | ||
19 | for(RelationView<?> relationView : relationViews) { | ||
20 | view2Listeners.put(relationView, new HashSet<>()); | ||
21 | } | ||
22 | } | ||
23 | public boolean containsRelationalView(RelationView<?> relationalKey) { | ||
24 | RelationView<?> relationView = relationalKey.getWrappedKey(); | ||
25 | return view2Listeners.containsKey(relationView); | ||
26 | } | ||
27 | public void addListener(RelationView<?> relationalKey, ITuple seed, IQueryRuntimeContextListener listener) { | ||
28 | RelationView<?> relationView = relationalKey.getWrappedKey(); | ||
29 | if(view2Listeners.containsKey(relationView)) { | ||
30 | RelationUpdateListenerEntry<?> entry = new RelationUpdateListenerEntry<>(relationalKey, seed, listener); | ||
31 | view2Listeners.get(relationView).add(entry); | ||
32 | } else throw new IllegalArgumentException(); | ||
33 | } | ||
34 | public void removeListener(RelationView<?> relationalKey, ITuple seed, IQueryRuntimeContextListener listener) { | ||
35 | RelationView<?> relationView = relationalKey.getWrappedKey(); | ||
36 | if(view2Listeners.containsKey(relationView)) { | ||
37 | RelationUpdateListenerEntry<?> entry = new RelationUpdateListenerEntry<>(relationalKey, seed, listener); | ||
38 | view2Listeners.get(relationView).remove(entry); | ||
39 | } else throw new IllegalArgumentException(); | ||
40 | } | ||
41 | |||
42 | public <D> void processChange(RelationView<D> relationView, Tuple tuple, D oldValue, D newValue) { | ||
43 | Set<RelationUpdateListenerEntry<?>> listeners = view2Listeners.get(relationView); | ||
44 | if(listeners != null) { | ||
45 | for(RelationUpdateListenerEntry<?> listener : listeners) { | ||
46 | @SuppressWarnings("unchecked") | ||
47 | RelationUpdateListenerEntry<D> typeCorrectListener = (RelationUpdateListenerEntry<D>) listener; | ||
48 | typeCorrectListener.processChange(tuple, oldValue, newValue); | ||
49 | } | ||
50 | } else throw new IllegalArgumentException("View was not indexed in constructor "+relationView); | ||
51 | } | ||
52 | } | ||