diff options
Diffstat (limited to 'model-data/src/main/java/org/eclipse/viatra/solver/data/query/internal/RelationUpdateListenerEntry.java')
-rw-r--r-- | model-data/src/main/java/org/eclipse/viatra/solver/data/query/internal/RelationUpdateListenerEntry.java | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/model-data/src/main/java/org/eclipse/viatra/solver/data/query/internal/RelationUpdateListenerEntry.java b/model-data/src/main/java/org/eclipse/viatra/solver/data/query/internal/RelationUpdateListenerEntry.java new file mode 100644 index 00000000..def02aa5 --- /dev/null +++ b/model-data/src/main/java/org/eclipse/viatra/solver/data/query/internal/RelationUpdateListenerEntry.java | |||
@@ -0,0 +1,62 @@ | |||
1 | package org.eclipse.viatra.solver.data.query.internal; | ||
2 | |||
3 | import java.util.Arrays; | ||
4 | import java.util.Objects; | ||
5 | |||
6 | import org.eclipse.viatra.query.runtime.matchers.context.IQueryRuntimeContextListener; | ||
7 | import org.eclipse.viatra.query.runtime.matchers.tuple.ITuple; | ||
8 | import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples; | ||
9 | import org.eclipse.viatra.solver.data.model.Tuple; | ||
10 | |||
11 | public class RelationUpdateListenerEntry<D> { | ||
12 | final RelationViewKey<D> key; | ||
13 | final ITuple filter; | ||
14 | final IQueryRuntimeContextListener listener; | ||
15 | |||
16 | public RelationUpdateListenerEntry(RelationViewKey<D> key, ITuple filter, IQueryRuntimeContextListener listener) { | ||
17 | super(); | ||
18 | this.key = key; | ||
19 | this.filter = filter; | ||
20 | this.listener = listener; | ||
21 | } | ||
22 | |||
23 | public void processChange(Tuple tuple, D oldValue, D newValue) { | ||
24 | Object[] oldTuple = isMatching(key.getWrappedKey().transform(tuple, oldValue), filter); | ||
25 | Object[] newTuple = isMatching(key.getWrappedKey().transform(tuple, newValue), filter); | ||
26 | |||
27 | if(!Arrays.equals(oldTuple, newTuple)) { | ||
28 | if(oldTuple != null) { | ||
29 | listener.update(key, Tuples.flatTupleOf(oldTuple), false); | ||
30 | } | ||
31 | if(newTuple != null) { | ||
32 | listener.update(key, Tuples.flatTupleOf(newTuple), true); | ||
33 | } | ||
34 | } | ||
35 | } | ||
36 | |||
37 | private Object[] isMatching(Object[] tuple, ITuple filter) { | ||
38 | for(int i = 0; i<filter.getSize(); i++) { | ||
39 | final Object filterObject = filter.get(i); | ||
40 | if(filterObject != null && !filterObject.equals(tuple[i])) { | ||
41 | return null; | ||
42 | } | ||
43 | } | ||
44 | return tuple; | ||
45 | } | ||
46 | |||
47 | @Override | ||
48 | public int hashCode() { | ||
49 | return Objects.hash(filter, key, listener); | ||
50 | } | ||
51 | |||
52 | @Override | ||
53 | public boolean equals(Object obj) { | ||
54 | if (this == obj) | ||
55 | return true; | ||
56 | if (!(obj instanceof RelationUpdateListenerEntry)) | ||
57 | return false; | ||
58 | RelationUpdateListenerEntry<?> other = (RelationUpdateListenerEntry<?>) obj; | ||
59 | return Objects.equals(filter, other.filter) && Objects.equals(key, other.key) | ||
60 | && Objects.equals(listener, other.listener); | ||
61 | } | ||
62 | } | ||