--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/invoke/ConstantCallSite.java	Wed Mar 23 23:02:31 2011 -0700
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2010, 2011, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 java.lang.invoke;
+
+/**
+ * A {@code ConstantCallSite} is a {@link CallSite} whose target is permanent, and can never be changed.
+ * An {@code invokedynamic} instruction linked to a {@code ConstantCallSite} is permanently
+ * bound to the call site's target.
+ * @author John Rose, JSR 292 EG
+ */
+public class ConstantCallSite extends CallSite {
+    /**
+     * Creates a call site with a permanent target.
+     * @param target the target to be permanently associated with this call site
+     * @throws NullPointerException if the proposed target is null
+     */
+    public ConstantCallSite(MethodHandle target) {
+        super(target);
+    }
+
+    /**
+     * Returns the target method of the call site, which behaves
+     * like a {@code final} field of the {@code ConstantCallSite}.
+     * That is, the the target is always the original value passed
+     * to the constructor call which created this instance.
+     *
+     * @return the immutable linkage state of this call site, a constant method handle
+     * @throws UnsupportedOperationException because this kind of call site cannot change its target
+     */
+    @Override public final MethodHandle getTarget() {
+        return target;
+    }
+
+    /**
+     * Always throws an {@link UnsupportedOperationException}.
+     * This kind of call site cannot change its target.
+     * @param ignore a new target proposed for the call site, which is ignored
+     * @throws UnsupportedOperationException because this kind of call site cannot change its target
+     */
+    @Override public final void setTarget(MethodHandle ignore) {
+        throw new UnsupportedOperationException("ConstantCallSite");
+    }
+
+    /**
+     * Returns this call site's permanent target.
+     * Since that target will never change, this is a correct implementation
+     * of {@link CallSite#dynamicInvoker CallSite.dynamicInvoker}.
+     * @return the immutable linkage state of this call site, a constant method handle
+     */
+    @Override
+    public final MethodHandle dynamicInvoker() {
+        return getTarget();
+    }
+}