/*

 * Copyright (c) 2014, 2015, 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.Constant;

import jdk.vm.ci.meta.JavaConstant;

import jdk.vm.ci.meta.JavaKind;

/**

 * The compressed representation of the {@link JavaConstant#NULL_POINTER null constant}.

 */

public final class HotSpotCompressedNullConstant implements JavaConstant, HotSpotConstant {

    public static final JavaConstant COMPRESSED_NULL = new HotSpotCompressedNullConstant();

    private HotSpotCompressedNullConstant() {

    }

    public JavaKind getJavaKind() {

        return JavaKind.Object;

    }

    @Override

    public boolean isNull() {

        return true;

    }

    @Override

    public boolean isCompressed() {

        return true;

    }

    public Constant compress() {

        throw new IllegalArgumentException();

    }

    public Constant uncompress() {

        return NULL_POINTER;

    }

    @Override

    public boolean isDefaultForKind() {

        return true;

    }

    @Override

    public Object asBoxedPrimitive() {

        throw new IllegalArgumentException();

    }

    @Override

    public int asInt() {

        throw new IllegalArgumentException();

    }

    @Override

    public boolean asBoolean() {

        throw new IllegalArgumentException();

    }

    @Override

    public long asLong() {

        throw new IllegalArgumentException();

    }

    @Override

    public float asFloat() {

        throw new IllegalArgumentException();

    }

    @Override

    public double asDouble() {

        throw new IllegalArgumentException();

    }

    @Override

    public String toString() {

        return JavaConstant.toString(this);

    }

    @Override

    public String toValueString() {

        return "null";

    }

    @Override

    public int hashCode() {

        return System.identityHashCode(this);

    }

    @Override

    public boolean equals(Object o) {

        return o instanceof HotSpotCompressedNullConstant;

    }

}