/*

 * Copyright (c) 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.

 */

import jdk.jfr.internal.Type;

final class ConstantLookup {

    private final Type type;

    private ConstantMap current;

    private ConstantMap previous = ConstantMap.EMPTY;

    ConstantLookup(ConstantMap current, Type type) {

        this.current = current;

        this.type = type;

    }

    public Type getType() {

        return type;

    }

    public ConstantMap getLatestPool() {

        return current;

    }

    public void newPool() {

        previous = current;

        current = new ConstantMap(current.factory, current.name);

    }

    public Object getPreviousResolved(long key) {

        return previous.getResolved(key);

    }

    public Object getCurrentResolved(long key) {

        return current.getResolved(key);

    }

    public Object getCurrent(long key) {

        return current.get(key);

    }

}