blob: da9bc47e6907b8070bb30baf5d126b82c6f93ee9 (
plain) (
blame)
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
|
/*******************************************************************************
* Copyright (c) 2010-2018, Tamas Szabo, Istvan Rath 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.network.indexer;
import java.util.Collections;
import java.util.Map;
import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
import tools.refinery.viatra.runtime.matchers.util.CollectionsFactory;
/**
* @author Tamas Szabo
* @since 2.0
*/
public class DefaultMessageIndexer implements MessageIndexer {
protected final Map<Tuple, Integer> indexer;
public DefaultMessageIndexer() {
this.indexer = CollectionsFactory.createMap();
}
public Map<Tuple, Integer> getTuples() {
return Collections.unmodifiableMap(this.indexer);
}
@Override
public int getCount(final Tuple update) {
final Integer count = getTuples().get(update);
if (count == null) {
return 0;
} else {
return count;
}
}
@Override
public void insert(final Tuple update) {
update(update, 1);
}
@Override
public void delete(final Tuple update) {
update(update, -1);
}
@Override
public void update(final Tuple update, final int delta) {
final Integer oldCount = this.indexer.get(update);
final int newCount = (oldCount == null ? 0 : oldCount) + delta;
if (newCount == 0) {
this.indexer.remove(update);
} else {
this.indexer.put(update, newCount);
}
}
@Override
public boolean isEmpty() {
return this.indexer.isEmpty();
}
@Override
public void clear() {
this.indexer.clear();
}
}
|