diff options
Diffstat (limited to 'subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/EmptyCardinalityInterval.java')
-rw-r--r-- | subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/EmptyCardinalityInterval.java | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/EmptyCardinalityInterval.java b/subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/EmptyCardinalityInterval.java new file mode 100644 index 00000000..8892b278 --- /dev/null +++ b/subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/EmptyCardinalityInterval.java | |||
@@ -0,0 +1,87 @@ | |||
1 | /* | ||
2 | * SPDX-FileCopyrightText: 2021-2024 The Refinery Authors <https://refinery.tools/> | ||
3 | * | ||
4 | * SPDX-License-Identifier: EPL-2.0 | ||
5 | */ | ||
6 | package tools.refinery.logic.term.cardinalityinterval; | ||
7 | |||
8 | import org.jetbrains.annotations.Nullable; | ||
9 | import tools.refinery.logic.term.uppercardinality.UpperCardinalities; | ||
10 | import tools.refinery.logic.term.uppercardinality.UpperCardinality; | ||
11 | |||
12 | // Singleton implementation, because there is only a single empty interval. | ||
13 | @SuppressWarnings("squid:S6548") | ||
14 | public final class EmptyCardinalityInterval implements CardinalityInterval { | ||
15 | static final EmptyCardinalityInterval INSTANCE = new EmptyCardinalityInterval(); | ||
16 | |||
17 | private EmptyCardinalityInterval() { | ||
18 | // Singleton constructor. | ||
19 | } | ||
20 | |||
21 | @Override | ||
22 | @Nullable | ||
23 | public Integer getConcrete() { | ||
24 | return null; | ||
25 | } | ||
26 | |||
27 | @Override | ||
28 | @Nullable | ||
29 | public Integer getArbitrary() { | ||
30 | return null; | ||
31 | } | ||
32 | |||
33 | @Override | ||
34 | public boolean isRefinementOf(CardinalityInterval other) { | ||
35 | return true; | ||
36 | } | ||
37 | |||
38 | @Override | ||
39 | public int lowerBound() { | ||
40 | return 1; | ||
41 | } | ||
42 | |||
43 | @Override | ||
44 | public UpperCardinality upperBound() { | ||
45 | return UpperCardinalities.ZERO; | ||
46 | } | ||
47 | |||
48 | @Override | ||
49 | public CardinalityInterval min(CardinalityInterval other) { | ||
50 | return this; | ||
51 | } | ||
52 | |||
53 | @Override | ||
54 | public CardinalityInterval max(CardinalityInterval other) { | ||
55 | return this; | ||
56 | } | ||
57 | |||
58 | @Override | ||
59 | public CardinalityInterval add(CardinalityInterval other) { | ||
60 | return this; | ||
61 | } | ||
62 | |||
63 | @Override | ||
64 | public CardinalityInterval take(int count) { | ||
65 | return this; | ||
66 | } | ||
67 | |||
68 | @Override | ||
69 | public CardinalityInterval multiply(CardinalityInterval other) { | ||
70 | return this; | ||
71 | } | ||
72 | |||
73 | @Override | ||
74 | public CardinalityInterval meet(CardinalityInterval other) { | ||
75 | return this; | ||
76 | } | ||
77 | |||
78 | @Override | ||
79 | public CardinalityInterval join(CardinalityInterval other) { | ||
80 | return other; | ||
81 | } | ||
82 | |||
83 | @Override | ||
84 | public String toString() { | ||
85 | return "error"; | ||
86 | } | ||
87 | } | ||