1 files changed, 69 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/context/AbstractQueryMetaContext.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/context/AbstractQueryMetaContext.java
new file mode 100644
index 00000000..99611758
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/context/AbstractQueryMetaContext.java
@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2016, Grill Balázs, IncQuery Labs 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.matchers.context;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Common abstract class for implementers of {@link IQueryMetaContext}
+ * 
+ * @author Grill Balázs
+ * @since 1.3
+ *
+ */
+public abstract class AbstractQueryMetaContext implements IQueryMetaContext {
+    
+    /**
+     * @since 2.0
+     */
+    @Override
+    public Map<InputKeyImplication, Set<InputKeyImplication>> getConditionalImplications(IInputKey implyingKey) {
+        return new HashMap<>();
+    }
+
+    /**
+     * @since 1.6
+     */
+    @Override
+    public boolean canLeadOutOfScope(IInputKey key) {
+        return key.getArity() > 1;
+    }
+    
+    /**
+     * @since 1.6
+     */
+    @Override
+    public Comparator<IInputKey> getSuggestedEliminationOrdering() {
+        return (o1, o2) -> 0;
+    }
+    
+    /**
+     * @since 1.6
+     */
+    @Override
+    public Collection<InputKeyImplication> getWeakenedAlternatives(IInputKey implyingKey) {
+        return Collections.emptySet();
+    }    
+
+    @Override
+    public boolean isPosetKey(IInputKey key) {
+        return false;
+    }
+
+    @Override
+    public IPosetComparator getPosetComparator(Iterable<IInputKey> key) {
+        return null;
+    }
+
+}