/**

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2013-2014 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

 * your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * Contributor(s):

 *

 * The Original Software is NetBeans. The Initial Developer of the Original

 * Software is Oracle. Portions Copyright 2013-2014 Oracle. All Rights Reserved.

 *

 * If you wish your version of this file to be governed by only the CDDL

 * or only the GPL Version 2, indicate your decision by adding

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

 * to extend the choice of license to its licensees as provided above.

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 */

package net.java.html.boot.truffle;

import com.oracle.truffle.api.TruffleLanguage;

import com.oracle.truffle.api.frame.VirtualFrame;

import com.oracle.truffle.api.interop.ForeignAccess;

import com.oracle.truffle.api.interop.InteropException;

import com.oracle.truffle.api.interop.Message;

import com.oracle.truffle.api.interop.TruffleObject;

import com.oracle.truffle.api.nodes.Node;

import com.oracle.truffle.api.nodes.RootNode;

final class FnRootNode extends RootNode {

    @Child

    private Node execute;

    private final TruffleObject fn;

    FnRootNode(TruffleObject fn, int arity) {

        super(TruffleLanguage.class, null, null);

        // one more argument for this

        this.execute = Message.createExecute(arity + 1).createNode();

        this.fn = fn;

    }

    @Override

    public Object execute(VirtualFrame frame) {

        try {

            final Object[] args = frame.getArguments();

            Object result = ForeignAccess.sendExecute(execute, frame, fn, args);

            return result;

        } catch (InteropException ex) {

            throw raise(RuntimeException.class, ex);

        }

    }

    private static <E extends Throwable> E raise(Class<E> castTo, Throwable t) throws E {

        throw (E)t;

    }

}