1 files changed, 44 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/ValueBinderFilterNode.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/ValueBinderFilterNode.java
new file mode 100644
index 00000000..c641bf6e
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/ValueBinderFilterNode.java
@@ -0,0 +1,44 @@
+/*******************************************************************************
+ * 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.single;
+
+import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
+import tools.refinery.viatra.runtime.rete.network.ReteContainer;
+
+/**
+ * A filter node that keeps only those tuples that contain a certain value at a certain position.
+ * 
+ * @author Bergmann Gabor
+ * 
+ */
+public class ValueBinderFilterNode extends FilterNode {
+
+    int bindingIndex;
+    Object bindingValue;
+
+    /**
+     * @param reteContainer
+     * @param bindingIndex
+     *            the position in the tuple that should be bound
+     * @param bindingValue
+     *            the value to which the tuple has to be bound
+     */
+    public ValueBinderFilterNode(ReteContainer reteContainer, int bindingIndex, Object bindingValue) {
+        super(reteContainer);
+        this.bindingIndex = bindingIndex;
+        this.bindingValue = bindingValue;
+    }
+
+    @Override
+    public boolean check(Tuple ps) {
+        return bindingValue.equals(ps.get(bindingIndex));
+    }
+
+}