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Elektron Transport API (ETA) Java Edition Converter Classes

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/*|-----------------------------------------------------------------------------
 *|            This source code is provided under the Apache 2.0 license
 *|  and is provided AS IS with no warranty or guarantee of fit for purpose.
 *|                See the project's LICENSE.md for details.
 *|           Copyright (C) 2019-2022 LSEG. All rights reserved.     
 *|-----------------------------------------------------------------------------
 */

package com.refinitiv.eta.json.util;

import java.util.ArrayDeque;
import java.util.Deque;
import java.util.function.Supplier;

public class UtilQueue {
    Deque queue;
    private final Supplier supplier;

    UtilQueue(int initialSize, Supplier supplier) {
        queue = new ArrayDeque<>(initialSize);
        this.supplier = supplier;
    }

    public T get() {
        T element = queue.poll();
        if (element == null)
            return supplier.get();
        else
            return element;
    }

    public void add(T element) {
        queue.add(element);
    }

    public int size() {
        return queue.size();
    }

    public void growPool(int numOfObjects) {
        for (int i = 0; i < numOfObjects; i++) {
            queue.add(supplier.get());
        }
    }
}