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Diffstat (limited to 'subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/matcher/integration/DontFlattenIncrementalPredicate.java')
-rw-r--r-- | subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/matcher/integration/DontFlattenIncrementalPredicate.java | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/matcher/integration/DontFlattenIncrementalPredicate.java b/subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/matcher/integration/DontFlattenIncrementalPredicate.java new file mode 100644 index 00000000..1b918528 --- /dev/null +++ b/subprojects/viatra-runtime-localsearch/src/main/java/tools/refinery/viatra/runtime/localsearch/matcher/integration/DontFlattenIncrementalPredicate.java | |||
@@ -0,0 +1,44 @@ | |||
1 | /******************************************************************************* | ||
2 | * Copyright (c) 2010-2016, Grill Balázs, IncQueryLabs Ltd. | ||
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 | package tools.refinery.viatra.runtime.localsearch.matcher.integration; | ||
10 | |||
11 | import tools.refinery.viatra.runtime.matchers.backend.QueryEvaluationHint; | ||
12 | import tools.refinery.viatra.runtime.matchers.backend.QueryEvaluationHint.BackendRequirement; | ||
13 | import tools.refinery.viatra.runtime.matchers.psystem.basicenumerables.PositivePatternCall; | ||
14 | import tools.refinery.viatra.runtime.matchers.psystem.rewriters.IFlattenCallPredicate; | ||
15 | |||
16 | /** | ||
17 | * This implementation forbids flattening of patterns marked to be executed with a caching / incremental backend. | ||
18 | * This makes is possible for the user to configure hybrid matching via using | ||
19 | * the 'search' and 'incremental keywords in the pattern definition file. | ||
20 | * | ||
21 | * @since 1.5 | ||
22 | * | ||
23 | */ | ||
24 | public class DontFlattenIncrementalPredicate implements IFlattenCallPredicate { | ||
25 | |||
26 | @Override | ||
27 | public boolean shouldFlatten(PositivePatternCall positivePatternCall) { | ||
28 | QueryEvaluationHint evaluationHints = positivePatternCall.getReferredQuery().getEvaluationHints(); | ||
29 | if (evaluationHints == null) return true; | ||
30 | |||
31 | BackendRequirement backendRequirementType = evaluationHints.getQueryBackendRequirementType(); | ||
32 | switch(backendRequirementType) { | ||
33 | case DEFAULT_CACHING: | ||
34 | return false; | ||
35 | case SPECIFIC: | ||
36 | return !evaluationHints.getQueryBackendFactory().isCaching(); | ||
37 | case UNSPECIFIED: | ||
38 | case DEFAULT_SEARCH: | ||
39 | default: | ||
40 | return true; | ||
41 | } | ||
42 | } | ||
43 | |||
44 | } | ||