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diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/index/GenericProjectionIndexer.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/index/GenericProjectionIndexer.java
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index 00000000..3de10def
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/index/GenericProjectionIndexer.java
@@ -0,0 +1,76 @@
+/*******************************************************************************
+ * Copyright (c) 2004-2008 Gabor Bergmann 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.rete.index;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Map;
+
+import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
+import tools.refinery.viatra.runtime.matchers.tuple.TupleMask;
+import tools.refinery.viatra.runtime.matchers.util.Direction;
+import tools.refinery.viatra.runtime.matchers.util.timeline.Timeline;
+import tools.refinery.viatra.runtime.rete.network.Receiver;
+import tools.refinery.viatra.runtime.rete.network.ReteContainer;
+import tools.refinery.viatra.runtime.rete.network.communication.Timestamp;
+
+/**
+ * A generic Indexer capable of indexing along any valid TupleMask. Does not keep track of parents, because will not
+ * ever pull parents.
+ * 
+ * @author Gabor Bergmann
+ * 
+ */
+public class GenericProjectionIndexer extends IndexerWithMemory implements ProjectionIndexer {
+
+    public GenericProjectionIndexer(ReteContainer reteContainer, TupleMask mask) {
+        super(reteContainer, mask);
+    }
+
+    @Override
+    protected void update(Direction direction, Tuple updateElement, Tuple signature, boolean change,
+            Timestamp timestamp) {
+        propagate(direction, updateElement, signature, change, timestamp);
+    }
+
+    @Override
+    public Collection<Tuple> get(Tuple signature) {
+        return memory.get(signature);
+    }
+
+    @Override
+    public Map<Tuple, Timeline<Timestamp>> getTimeline(Tuple signature) {
+        return memory.getWithTimeline(signature);
+    }
+
+    @Override
+    public Iterator<Tuple> iterator() {
+        return memory.iterator();
+    }
+
+    @Override
+    public Iterable<Tuple> getSignatures() {
+        return memory.getSignatures();
+    }
+
+    /**
+     * @since 2.0
+     */
+    @Override
+    public int getBucketCount() {
+        return memory.getKeysetSize();
+    }
+
+    @Override
+    public Receiver getActiveNode() {
+        return this;
+    }
+
+}