--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CallTarget.java	Tue Dec 18 17:59:32 2012 +0100
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 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;
+
+import com.oracle.truffle.api.frame.*;
+
+/**
+ * Represents the target of a call. Instances of this interface can be created using the
+ * {@link TruffleRuntime#createCallTarget(com.oracle.truffle.api.nodes.RootNode, FrameDescriptor)} method.
+ */
+public abstract class CallTarget {
+
+    /**
+     * Calls this target as a root method and without arguments.
+     * @return the return result of the call
+     */
+    public final Object call() {
+        return call(null, Arguments.EMPTY_ARGUMENTS);
+    }
+
+    /**
+     * Calls this target with a caller frame and no arguments.
+     * @param caller the caller frame
+     * @return the return result of the call
+     */
+    public final Object call(PackedFrame caller) {
+        return call(caller, Arguments.EMPTY_ARGUMENTS);
+    }
+
+    /**
+     * Calls this target as a root method passing arguments.
+     * @param arguments the arguments that should be passed to the callee
+     * @return the return result of the call
+     */
+    public final Object call(Arguments arguments) {
+        return call(null, arguments);
+    }
+
+    /**
+     * Calls this target passing a caller frame and arguments.
+     * @param caller the caller frame
+     * @param arguments the arguments that should be passed to the callee
+     * @return the return result of the call
+     */
+    public abstract Object call(PackedFrame caller, Arguments arguments);
+}