/// <summary>
/// Move to the next items.
/// </summary>
/// <returns><c>true</c> if there is a next item, <c>false</c> otherwise</returns>
public override bool MoveNext()
{
PageFetcher <T> .Page <T> page = GetCurrentPage();
if (page == null)
{
return(false);
}
IList <T> items = page.Items;
if (items == null || items.Count == 0)
{
return(false);
}
if (SkipOffset == items.Count)
{
if (!HasMoreItems)
{
return(false);
}
page = IncrementPage();
items = page?.Items;
}
if (items == null || items.Count == 0 || SkipOffset == items.Count)
{
return(false);
}
current = items[IncrementSkipOffset()];
return(true);
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="skipCount">the skip count</param>
/// <param name="pageFetcher">the delegate that fetches a page</param>
protected AbstractEnumerator(BigInteger skipCount, PageFetcher <T> pageFetcher)
{
this.SkipCount = skipCount;
this.pageFetcher = pageFetcher;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="position">the skip count</param>
/// <param name="pageFetcher">>the delegate that fetches a page</param>
protected AbstractEnumerable(BigInteger position, PageFetcher <T> pageFetcher)
{
this.PageFetcher = pageFetcher;
this.SkipCount = position;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="pageFetcher">>the delegate that fetches a page</param>
public AbstractEnumerable(PageFetcher <T> pageFetcher) :
this(0, pageFetcher)
{
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="skipCount">the skip count</param>
/// <param name="pageFetcher">the delegate that fetches a page</param>
public CollectionPageEnumerator(BigInteger skipCount, PageFetcher <T> pageFetcher) :
base(skipCount, pageFetcher)
{
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="position">the position</param>
/// <param name="pageFetcher">the delegate that fetches a page</param>
public CollectionPageEnumerable(BigInteger position, PageFetcher <T> pageFetcher) :
base(position, pageFetcher)
{
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="pageFetcher">the delegate that fetches a page</param>
public CollectionPageEnumerable(PageFetcher <T> pageFetcher) :
this(0, pageFetcher)
{
}