/*

 * Copyright (c) 2010, 2013, 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.

 */

/*

 * This file is available under and governed by the GNU General Public

 * License version 2 only, as published by the Free Software Foundation.

 * However, the following notice accompanied the original version of this

 * file, and Oracle licenses the original version of this file under the BSD

 * license:

 */

/*

   Copyright 2009-2013 Attila Szegedi

*/

package jdk.dynalink.linker.support;

import java.util.Objects;

import jdk.dynalink.CallSiteDescriptor;

import jdk.dynalink.linker.LinkRequest;

/**

 * Default simple implementation of {@link LinkRequest}.

 */

public class SimpleLinkRequest implements LinkRequest {

    private final CallSiteDescriptor callSiteDescriptor;

    private final Object[] arguments;

    private final boolean callSiteUnstable;

    /**

     * Creates a new link request.

     *

     * @param callSiteDescriptor the descriptor for the call site being linked.

     * Must not be null.

     * @param callSiteUnstable true if the call site being linked is considered

     * unstable.

     * @param arguments the arguments for the invocation. Must not be null.

     * @throws NullPointerException if either {@code callSiteDescriptor} or

     * {@code arguments} is null.

     */

    public SimpleLinkRequest(final CallSiteDescriptor callSiteDescriptor, final boolean callSiteUnstable, final Object... arguments) {

        this.callSiteDescriptor = Objects.requireNonNull(callSiteDescriptor);

        this.callSiteUnstable = callSiteUnstable;

        this.arguments = arguments.clone();

    }

    @Override

    public Object[] getArguments() {

        return arguments.clone();

    }

    @Override

    public Object getReceiver() {

        return arguments.length > 0 ? arguments[0] : null;

    }

    @Override

    public CallSiteDescriptor getCallSiteDescriptor() {

        return callSiteDescriptor;

    }

    @Override

    public boolean isCallSiteUnstable() {

        return callSiteUnstable;

    }

    @Override

    public LinkRequest replaceArguments(final CallSiteDescriptor newCallSiteDescriptor, final Object... newArguments) {

        return new SimpleLinkRequest(newCallSiteDescriptor, callSiteUnstable, newArguments);

    }

}