/*
 * Copyright (c) 2012, 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.graal.api.runtime;

public class Graal {

    private static GraalRuntime runtime;

    private static native GraalRuntime initializeRuntime();

    public static GraalRuntime getRuntime() {
        return runtime;
    }

    static {
        try {
            runtime = initializeRuntime();
        } catch (UnsatisfiedLinkError e) {
            runtime = new GraalRuntime() {

                @Override
                public String getName() {
                    return "";
                }

                @Override
                public <T> T getCapability(Class<T> clazz) {
                    return null;
                }
            };
        }
    }

    public static <T> T getRequiredCapability(Class<T> clazz) {
        T t = getRuntime().getCapability(clazz);
        if (t == null) {
            throw new IllegalAccessError("Runtime does not expose required capability " + clazz.getName());
        }
        return t;
    }
}