1 files changed, 43 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/misc/Bag.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/misc/Bag.java
new file mode 100644
index 00000000..4aef0f96
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/misc/Bag.java
@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * 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.misc;
+
+import java.util.Collection;
+import java.util.LinkedList;
+
+import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
+import tools.refinery.viatra.runtime.matchers.util.Direction;
+import tools.refinery.viatra.runtime.rete.network.ReteContainer;
+import tools.refinery.viatra.runtime.rete.network.communication.Timestamp;
+
+/**
+ * @author Gabor Bergmann
+ * 
+ *         A bag is a container that tuples can be dumped into. Does NOT propagate updates! Optimized for small contents
+ *         size OR positive updates only.
+ */
+public class Bag extends SimpleReceiver {
+
+    public Collection<Tuple> contents;
+
+    public Bag(ReteContainer reteContainer) {
+        super(reteContainer);
+        contents = new LinkedList<Tuple>();
+    }
+
+    @Override
+    public void update(Direction direction, Tuple updateElement, Timestamp timestamp) {
+        if (direction == Direction.INSERT)
+            contents.add(updateElement);
+        else
+            contents.remove(updateElement);
+    }
+    
+}