blob: 9e6ea10e4f42258356b48f886e770c57bffc0b56 (
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*******************************************************************************
* Copyright (c) 2010-2014, Bergmann Gabor, 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.matchers.planning.operations;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Collectors;
import tools.refinery.viatra.runtime.matchers.psystem.PConstraint;
import tools.refinery.viatra.runtime.matchers.psystem.PVariable;
/**
* No constraints, and no parent SubPlan, just a (possibly empty) set of a priori known (input) variables. Satisfied by a single tuple.
*
* <p> Can also be used without a priori variables,
* e.g. as a "virtual parent" in extreme cases,
* such as <code>pattern foo(Bar) = {Bar = eval (3*4)} </code>
*
* @author Bergmann Gabor
*
*/
public class PStart extends POperation {
private Set<PVariable> aPrioriVariables;
public PStart(Set<PVariable> aPrioriVariables) {
super();
this.aPrioriVariables = aPrioriVariables;
}
public PStart(PVariable... aPrioriVariables) {
this(new HashSet<PVariable>(Arrays.asList(aPrioriVariables)));
}
public Set<PVariable> getAPrioriVariables() {
return aPrioriVariables;
}
@Override
public String getShortName() {
return aPrioriVariables.stream().map(PVariable::getName).collect(Collectors.joining(",", "START_{", "}"));
}
@Override
public int numParentSubPlans() {
return 0;
}
@Override
public Set<? extends PConstraint> getDeltaConstraints() {
return Collections.emptySet();
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime
* result
+ ((aPrioriVariables == null) ? 0 : aPrioriVariables.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof PStart))
return false;
PStart other = (PStart) obj;
if (aPrioriVariables == null) {
if (other.aPrioriVariables != null)
return false;
} else if (!aPrioriVariables.equals(other.aPrioriVariables))
return false;
return true;
}
}
|
