blob: b0b507fee992f1593579c97b72582c548f3e4984 (
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
|
/*
* SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.query.viatra.internal.matcher;
import org.eclipse.viatra.query.runtime.matchers.tuple.ITuple;
import tools.refinery.store.map.Cursor;
import tools.refinery.store.tuple.Tuple;
import java.util.Iterator;
/**
* Cursor for a functional result set that iterates over a stream of raw matches and doesn't check whether the
* functional dependency of the output on the inputs is obeyed.
* @param <T> The output type.
*/
class UnsafeFunctionalCursor<T> implements Cursor<Tuple, T> {
private final Iterator<? extends ITuple> tuplesIterator;
private boolean terminated;
private Tuple key;
private T value;
public UnsafeFunctionalCursor(Iterator<? extends ITuple> tuplesIterator) {
this.tuplesIterator = tuplesIterator;
}
@Override
public Tuple getKey() {
return key;
}
@Override
public T getValue() {
return value;
}
@Override
public boolean isTerminated() {
return terminated;
}
@Override
public boolean move() {
if (!terminated && tuplesIterator.hasNext()) {
var match = tuplesIterator.next();
key = MatcherUtils.keyToRefineryTuple(match);
value = MatcherUtils.getValue(match);
return true;
}
terminated = true;
return false;
}
}
|
