1 files changed, 51 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/TupleMaskIdentity.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/TupleMaskIdentity.java
new file mode 100644
index 00000000..62746587
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/tuple/TupleMaskIdentity.java
@@ -0,0 +1,51 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2017, Gabor Bergmann, IncQueryLabs 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 java.util.List;
+
+/**
+ * @author Gabor Bergmann
+ * @since 1.7
+ */
+public final class TupleMaskIdentity extends TupleMask {
+
+    TupleMaskIdentity(int sourceWidth) {
+        this(constructLinearSequence(sourceWidth), sourceWidth);
+    }
+    TupleMaskIdentity(int[] indices, int sourceWidth) {
+        super(indices, sourceWidth, indices, true);
+    }
+
+    @Override
+    public <T> List<T> transform(List<T> original) {
+        return original;
+    }
+    
+    @Override
+    public Tuple transform(ITuple original) {
+        return original.toImmutable();
+    }
+    
+    @Override
+    public TupleMask transform(TupleMask mask) {
+        return mask;
+    }
+
+    @Override
+    public Tuple revertFrom(ITuple masked) {
+        return masked.toImmutable();
+    }
+    
+    @Override
+    public boolean isIdentity() {
+        return true;
+    }
+    
+}