1 files changed, 47 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/VolatileModifiableMaskedTuple.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/VolatileModifiableMaskedTuple.java
new file mode 100644
index 00000000..92306c6e
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/VolatileModifiableMaskedTuple.java
@@ -0,0 +1,47 @@
+/*******************************************************************************
+ * 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;
+
+import tools.refinery.viatra.runtime.matchers.util.Preconditions;
+
+/**
+ * A masked tuple implementation that allows modifying the backing tuple.
+ * @author Zoltan Ujhelyi
+ * @since 1.7
+ *
+ */
+public class VolatileModifiableMaskedTuple extends VolatileMaskedTuple implements IModifiableTuple {
+
+    private IModifiableTuple modifiableTuple;
+
+    public VolatileModifiableMaskedTuple(IModifiableTuple source, TupleMask mask) {
+        super(source, mask);
+        modifiableTuple = source;
+    }
+
+    public VolatileModifiableMaskedTuple(TupleMask mask) {
+        this(null, mask);
+    }
+    
+    @Override
+    public void updateTuple(ITuple newSource) {
+        Preconditions.checkArgument(newSource instanceof IModifiableTuple, "Provided tuple does not support updates");
+        this.updateTuple((IModifiableTuple)newSource);
+    }
+    
+    public void updateTuple(IModifiableTuple newSource) {
+        super.updateTuple(newSource);
+        modifiableTuple = newSource;
+    }
+
+    @Override
+    public void set(int index, Object value) {
+        mask.set(modifiableTuple, index, value);
+    }
+}