Merge pull request #39 from kris7t/partial-interpretation

Implement partial interpretation based model generation

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 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2016, Grill Balázs, IncQueryLabs Ltd.
+ * 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.localsearch.matcher.integration;
+
+import tools.refinery.viatra.runtime.matchers.backend.QueryEvaluationHint;
+import tools.refinery.viatra.runtime.matchers.backend.QueryEvaluationHint.BackendRequirement;
+import tools.refinery.viatra.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import tools.refinery.viatra.runtime.matchers.psystem.rewriters.IFlattenCallPredicate;
+
+/**
+ * This implementation forbids flattening of patterns marked to be executed with a caching / incremental backend. 
+ * This makes is possible for the user to configure hybrid matching via using 
+ * the 'search' and 'incremental keywords in the pattern definition file.
+ * 
+ * @since 1.5
+ *
+ */
+public class DontFlattenIncrementalPredicate implements IFlattenCallPredicate {
+
+    @Override
+    public boolean shouldFlatten(PositivePatternCall positivePatternCall) {
+        QueryEvaluationHint evaluationHints = positivePatternCall.getReferredQuery().getEvaluationHints();
+        if (evaluationHints == null) return true;
+        
+        BackendRequirement backendRequirementType = evaluationHints.getQueryBackendRequirementType();
+        switch(backendRequirementType) {
+        case DEFAULT_CACHING:
+            return false;
+        case SPECIFIC:
+            return !evaluationHints.getQueryBackendFactory().isCaching();
+        case UNSPECIFIED:
+        case DEFAULT_SEARCH:
+        default:
+            return true;
+        }
+    }
+
+}