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/*
 * Copyright (c) Microsoft. All rights reserved.
 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
 */
package com.microsoft.azure.servicebus;

import java.util.Iterator;

public 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;
	}
}