/*

 * Copyright (c) 2018, 2019, 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 jdk.vm.ci.hotspot;

import jdk.vm.ci.meta.JavaConstant;

final class DirectHotSpotObjectConstantImpl extends HotSpotObjectConstantImpl {

    static JavaConstant forObject(Object object, boolean compressed) {

        if (object == null) {

            return compressed ? HotSpotCompressedNullConstant.COMPRESSED_NULL : JavaConstant.NULL_POINTER;

        } else {

            return new DirectHotSpotObjectConstantImpl(object, compressed);

        }

    }

    static HotSpotObjectConstantImpl forNonNullObject(Object object, boolean compressed) {

        if (object == null) {

            throw new NullPointerException();

        }

        return new DirectHotSpotObjectConstantImpl(object, compressed);

    }

    private DirectHotSpotObjectConstantImpl(Object object, boolean compressed) {

        super(compressed);

        assert object != null;

        this.object = object;

    }

    final Object object;

    @Override

    public JavaConstant compress() {

        assert !compressed;

        return new DirectHotSpotObjectConstantImpl(object, true);

    }

    @Override

    public JavaConstant uncompress() {

        assert compressed;

        return new DirectHotSpotObjectConstantImpl(object, false);

    }

    @Override

    public int getIdentityHashCode() {

        return System.identityHashCode(object);

    }

}