/*

 * Copyright (c) 2009, 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 java.util.Arrays;

import jdk.vm.ci.code.Location;

import jdk.vm.ci.code.ReferenceMap;

/**

 * Describes where the object references are in machine state, compliant with what HotSpot expects.

 */

public final class HotSpotReferenceMap extends ReferenceMap {

    private final Location[] objects;

    private final Location[] derivedBase;

    private final int[] sizeInBytes;

    private final int maxRegisterSize;

    /**

     *

     * @param objects This array is now owned by this object and must not be mutated by the caller.

     * @param derivedBase This array is now owned by this object and must not be mutated by the

     *            caller.

     * @param sizeInBytes This array is now owned by this object and must not be mutated by the

     *            caller.

     */

    @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `objects`, `derivedBase` and `sizeInBytes`")

    public HotSpotReferenceMap(Location[] objects, Location[] derivedBase, int[] sizeInBytes, int maxRegisterSize) {

        this.objects = objects;

        this.derivedBase = derivedBase;

        this.sizeInBytes = sizeInBytes;

        this.maxRegisterSize = maxRegisterSize;

    }

    @Override

    public int hashCode() {

        throw new UnsupportedOperationException();

    }

    @Override

    public boolean equals(Object obj) {

        if (this == obj) {

            return true;

        }

        if (obj instanceof HotSpotReferenceMap) {

            HotSpotReferenceMap that = (HotSpotReferenceMap) obj;

            if (sizeInBytes == that.sizeInBytes && maxRegisterSize == that.maxRegisterSize && Arrays.equals(objects, that.objects) && Arrays.equals(derivedBase, that.derivedBase)) {

                return true;

            }

        }

        return false;

    }

    @Override

    public String toString() {

        return Arrays.toString(objects);

    }

}