--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.codegen/src/com/oracle/truffle/api/codegen/NodeFactory.java	Mon Feb 25 13:13:02 2013 +0100
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.codegen;
+
+import java.util.*;
+
+/**
+ * Enables the dynamic creation of generated nodes. It provides an convenient way to instantiate
+ * generated node classes without using reflection.
+ */
+public interface NodeFactory<T> {
+
+    /**
+     * Instantiates the node using the arguments array. The arguments length and types must suffice
+     * one of the returned signatures in {@link #getNodeSignatures()}. If the arguments array does
+     * not suffice one of the node signatures an {@link IllegalArgumentException} is thrown.
+     * 
+     * @param arguments the argument values
+     * @return the instantiated node
+     * @throws IllegalArgumentException
+     */
+    T createNode(Object... arguments);
+
+    /**
+     * Instantiates a new specialized variant of the node. This is an optional method and throws an
+     * {@link UnsupportedOperationException} if not supported.
+     * 
+     * @param thisNode the current node
+     * @param specializionClasses
+     * @return the specialized node
+     */
+    T createNodeSpecialized(T thisNode, Class<?>... specializionClasses);
+
+    /**
+     * Returns the node class that will get created by {@link #createNode(Object...)}. The node
+     * class does not match exactly to the instantiated object but they are guaranteed to be
+     * assignable.
+     */
+    Class<T> getNodeClass();
+
+    /**
+     * Returns a list of signatures that can be used to invoke {@link #createNode(Object...)}.
+     */
+    List<List<Class<?>>> getNodeSignatures();
+
+}