1 files changed, 27 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/IModifiableTuple.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/IModifiableTuple.java
new file mode 100644
index 00000000..f5dab2a5
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/IModifiableTuple.java
@@ -0,0 +1,27 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2017, Zoltan Ujhelyi, 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.tuple;
+
+/**
+ * A tuple that allows modifying the underlying value. Should not be used for non-volatile tuples.
+ * 
+ * @author Zoltan Ujhelyi
+ * @since 1.7
+ */
+public interface IModifiableTuple extends ITuple {
+
+    /**
+     * Sets the selected value for a tuple
+     * 
+     * @pre: 0 <= index < getSize()
+     * 
+     */
+    void set(int index, Object value);
+
+}