/*

 * Copyright (c) 2010, 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.

 *

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 */

package java.dyn;

/**

 * A {@code ConstantCallSite} is a {@link CallSite} whose target is permanent, and can never be changed.

 * The only way to relink an {@code invokedynamic} instruction bound to a {@code ConstantCallSite} is

 * to invalidate the instruction as a whole.

 * @author John Rose, JSR 292 EG

 */

public class ConstantCallSite extends CallSite {

    /** Create a call site with a permanent target. */

    public ConstantCallSite(MethodHandle target) {

        super(target);

    }

    /** Throw an {@link IllegalArgumentException}, because this kind of call site cannot change its target. */

    @Override public final void setTarget(MethodHandle ignore) {

        throw new IllegalArgumentException("ConstantCallSite");

    }

}