/*

 * Copyright (c) 2010, 2018, 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 vm.gc.containers;

import java.util.Collection;

import java.util.Iterator;

import nsk.share.gc.gp.GarbageProducer;

import nsk.share.gc.gp.MemoryStrategy;

/*

 * This class updates collection by removal of random elements

 * via iterator and adding the same number of elements.

 */

class CollectionContainer extends TypicalContainer {

    Collection collection;

    public CollectionContainer(Collection collection, long maximumSize,

            GarbageProducer garbageProducer, MemoryStrategy memoryStrategy, Speed speed) {

        super(maximumSize, garbageProducer, memoryStrategy, speed);

        this.collection = collection;

    }

    @Override

    public void initialize() {

        for (int i = 0; i < count; i++) {

            if (!stresser.continueExecution()) {

                return;

            }

            collection.add(garbageProducer.create(size));

        }

    }

    @Override

    public void update() {

        Iterator iter = collection.iterator();

        int i = 0;

        while (iter.hasNext()) {

            Object obj = iter.next();

            if (i++ / 100 < speed.getValue()) {

                if (!stresser.continueExecution()) {

                    return;

                }

                iter.remove();

                garbageProducer.validate(obj);

            }

        }

        while (i != 0) {

            if (i-- / 100 < speed.getValue()) {

                if (!stresser.continueExecution()) {

                    return;

                }

                collection.add(garbageProducer.create(size));

            }

        }

    }

}