1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*******************************************************************************
* Copyright (c) 2004-2012 Gabor Bergmann and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.rete.index;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
import tools.refinery.viatra.runtime.matchers.tuple.TupleMask;
import tools.refinery.viatra.runtime.matchers.util.Direction;
import tools.refinery.viatra.runtime.rete.network.Node;
import tools.refinery.viatra.runtime.rete.network.ReteContainer;
import tools.refinery.viatra.runtime.rete.network.Supplier;
import tools.refinery.viatra.runtime.rete.network.communication.Timestamp;
/**
* Defines an abstract trivial indexer that identically projects the contents of some stateful node, and can therefore
* save space. Can only exist in connection with a stateful store, and must be operated by another node (the active
* node). Do not attach parents directly!
*
* @author Gabor Bergmann
* @noimplement Rely on the provided implementations
* @noreference Use only via standard Node and Indexer interfaces
* @noinstantiate This class is not intended to be instantiated by clients.
*/
public abstract class IdentityIndexer extends SpecializedProjectionIndexer {
protected abstract Collection<Tuple> getTuples();
public IdentityIndexer(ReteContainer reteContainer, int tupleWidth, Supplier parent,
Node activeNode, List<ListenerSubscription> sharedSubscriptionList) {
super(reteContainer, TupleMask.identity(tupleWidth), parent, activeNode, sharedSubscriptionList);
}
@Override
public Collection<Tuple> get(Tuple signature) {
if (contains(signature)) {
return Collections.singleton(signature);
} else
return null;
}
protected boolean contains(Tuple signature) {
return getTuples().contains(signature);
}
@Override
public Collection<Tuple> getSignatures() {
return getTuples();
}
@Override
public int getBucketCount() {
return getTuples().size();
}
@Override
public Iterator<Tuple> iterator() {
return getTuples().iterator();
}
@Override
public void propagateToListener(IndexerListener listener, Direction direction, Tuple updateElement, Timestamp timestamp) {
listener.notifyIndexerUpdate(direction, updateElement, updateElement, true, timestamp);
}
}
|
