diff options
Diffstat (limited to 'subprojects/viatra-runtime-matchers/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/basicdeferred/ExportedParameter.java')
-rw-r--r-- | subprojects/viatra-runtime-matchers/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/basicdeferred/ExportedParameter.java | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/subprojects/viatra-runtime-matchers/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/basicdeferred/ExportedParameter.java b/subprojects/viatra-runtime-matchers/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/basicdeferred/ExportedParameter.java new file mode 100644 index 00000000..80706792 --- /dev/null +++ b/subprojects/viatra-runtime-matchers/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/basicdeferred/ExportedParameter.java | |||
@@ -0,0 +1,108 @@ | |||
1 | /******************************************************************************* | ||
2 | * Copyright (c) 2004-2010 Gabor Bergmann and Daniel Varro | ||
3 | * This program and the accompanying materials are made available under the | ||
4 | * terms of the Eclipse Public License v. 2.0 which is available at | ||
5 | * http://www.eclipse.org/legal/epl-v20.html. | ||
6 | * | ||
7 | * SPDX-License-Identifier: EPL-2.0 | ||
8 | *******************************************************************************/ | ||
9 | |||
10 | package tools.refinery.viatra.runtime.matchers.psystem.basicdeferred; | ||
11 | |||
12 | import java.util.Collections; | ||
13 | import java.util.Set; | ||
14 | |||
15 | import tools.refinery.viatra.runtime.matchers.planning.QueryProcessingException; | ||
16 | import tools.refinery.viatra.runtime.matchers.psystem.PBody; | ||
17 | import tools.refinery.viatra.runtime.matchers.psystem.PVariable; | ||
18 | import tools.refinery.viatra.runtime.matchers.psystem.VariableDeferredPConstraint; | ||
19 | import tools.refinery.viatra.runtime.matchers.psystem.queries.PParameter; | ||
20 | import tools.refinery.viatra.runtime.matchers.psystem.queries.PQuery; | ||
21 | |||
22 | /** | ||
23 | * @author Gabor Bergmann | ||
24 | * | ||
25 | */ | ||
26 | public class ExportedParameter extends VariableDeferredPConstraint { | ||
27 | PVariable parameterVariable; | ||
28 | final String parameterName; | ||
29 | final PParameter patternParameter; | ||
30 | |||
31 | /** | ||
32 | * @since 1.4 | ||
33 | */ | ||
34 | public ExportedParameter(PBody pBody, PVariable parameterVariable, PParameter patternParameter) { | ||
35 | super(pBody, Collections.singleton(parameterVariable)); | ||
36 | this.parameterVariable = parameterVariable; | ||
37 | this.patternParameter = patternParameter; | ||
38 | parameterName = patternParameter.getName(); | ||
39 | } | ||
40 | |||
41 | @Override | ||
42 | public void doReplaceVariable(PVariable obsolete, PVariable replacement) { | ||
43 | if (obsolete.equals(parameterVariable)) | ||
44 | parameterVariable = replacement; | ||
45 | } | ||
46 | |||
47 | @Override | ||
48 | protected String toStringRest() { | ||
49 | Object varName = parameterVariable.getName(); | ||
50 | return parameterName.equals(varName) ? parameterName : parameterName + "(" + varName + ")"; | ||
51 | } | ||
52 | |||
53 | @Override | ||
54 | public Set<PVariable> getDeducedVariables() { | ||
55 | return Collections.emptySet(); | ||
56 | } | ||
57 | |||
58 | /** | ||
59 | * The name of the parameter; usually, it is expected that {@link #getParameterVariable()} is more useful, except | ||
60 | * maybe for debugging purposes. | ||
61 | * | ||
62 | * @return a non-null name of the parameter | ||
63 | */ | ||
64 | public String getParameterName() { | ||
65 | return parameterName; | ||
66 | } | ||
67 | |||
68 | public PVariable getParameterVariable() { | ||
69 | return parameterVariable; | ||
70 | } | ||
71 | |||
72 | /** | ||
73 | * @since 1.4 | ||
74 | */ | ||
75 | public PParameter getPatternParameter() { | ||
76 | if (patternParameter == null) { | ||
77 | PQuery query = pBody.getPattern(); | ||
78 | Integer index = query.getPositionOfParameter(parameterName); | ||
79 | if (index == null) { | ||
80 | throw new IllegalStateException(String.format("Pattern %s does not have a parameter named %s", | ||
81 | query.getFullyQualifiedName(), parameterName)); | ||
82 | } | ||
83 | return query.getParameters().get(index); | ||
84 | } else { | ||
85 | return patternParameter; | ||
86 | } | ||
87 | } | ||
88 | |||
89 | @Override | ||
90 | public Set<PVariable> getDeferringVariables() { | ||
91 | return Collections.singleton(parameterVariable); | ||
92 | } | ||
93 | |||
94 | @Override | ||
95 | public void checkSanity() { | ||
96 | super.checkSanity(); | ||
97 | if (!parameterVariable.isDeducable()) { | ||
98 | String[] args = { parameterName }; | ||
99 | String msg = "Impossible to match pattern: " | ||
100 | + "exported pattern variable {1} can not be determined based on the pattern constraints. " | ||
101 | + "HINT: certain constructs (e.g. negative patterns or check expressions) cannot output symbolic parameters."; | ||
102 | String shortMsg = "Could not deduce value of parameter"; | ||
103 | throw new QueryProcessingException(msg, args, shortMsg, null); | ||
104 | } | ||
105 | |||
106 | } | ||
107 | |||
108 | } | ||