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Java library for Azure Service Bus. Please note, a newer package com.azure:azure-messaging-servicebus for Azure Service Bus is available as of December 2020. While this package will continue to receive critical bug fixes, we strongly encourage you to upgrade. Read the migration guide at https://aka.ms/azsdk/java/migrate/sb for more details.

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

package com.microsoft.azure.servicebus.primitives;

import java.util.Iterator;

final class IteratorUtil {
    private IteratorUtil() {
    }

    public static  boolean sizeEquals(Iterable iterable, int expectedSize) {
        Iterator iterator = iterable.iterator();

        int currentSize = 0;
        while (iterator.hasNext()) {
            if (expectedSize > currentSize) {
                currentSize++;
                iterator.next();
                continue;
            } else {
                return false;
            }
        }

        return true;
    }

    public static  T getLast(Iterator iterator) {
        T last = null;
        while (iterator.hasNext()) {
            last = iterator.next();
        }

        return last;
    }

    public static  T getFirst(final Iterable iterable) {
        if (iterable == null) {
            return null;
        }

        final Iterator iterator = iterable.iterator();
        if (iterator == null) {
            return null;
        }

        return iterator.hasNext() ? iterator.next() : null;
    }
}