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diff --git a/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Functions.java b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Functions.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.utils.datastructures;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public class Functions {
+
+    /**
+     * Returns a constant function that always evaluates to the specified
+     * arguments.
+     * 
+     * @param <T>
+     * @param t the desired result of the created function
+     * @return
+     */
+    public static final <T> Function<T[]> constant(@SuppressWarnings("unchecked") final T... t) {
+        return new Function<T[]>() {
+            @Override
+            public T[] execute(Object... obj) {
+                return t;
+            }
+        };
+    }
+
+}