/// <summary>
/// Checks if data source has a element after the passed as parameter
/// </summary>
/// <param name="current">Current element</param>
/// <returns>True, if there is a next element, false if there is not</returns>
public bool HasNext(Entities.monumentsCollectionSchema current)
{
if (current == null || !_data.Any())
{
return(false);
}
return(_data.IndexOf(current) < _data.Count - 1);
}
/// <summary>
/// Checks if data source has a element before the passed as parameter
/// </summary>
/// <param name="current">Current element</param>
/// <returns>True, if there is a previous element, false if there is not</returns>
public bool HasPrevious(Entities.monumentsCollectionSchema current)
{
if (current == null || !_data.Any())
{
return(false);
}
return(_data.IndexOf(current) > 0);
}
/// <summary>
/// Checks if data source has a element after the passed as parameter
/// </summary>
/// <param name="current">Current element</param>
/// <returns>True, if there is a next element, false if there is not</returns>
public bool HasNext(Entities.monumentsCollectionSchema current)
{
var data = GetData();
if (current == null || !data.Any())
{
return(false);
}
return(data.IndexOf(current) < data.Count - 1);
}
/// <summary>
/// Retrieves the next element from source.
/// </summary>
/// <param name="current">Current element</param>
/// <returns>The next element from items, if it exists. Otherwise, returns null</returns>
public Entities.monumentsCollectionSchema Next(Entities.monumentsCollectionSchema current)
{
if (current == null || !_data.Any())
{
return(null);
}
if (_data.Last().Equals(current))
{
return(null);
}
return(_data[_data.IndexOf(current) + 1]);
}
/// <summary>
/// Retrieves the previous element from source.
/// </summary>
/// <param name="current">Current element</param>
/// <returns>The previous element from items, if it exists. Otherwise, returns null</returns>
public Entities.monumentsCollectionSchema Previous(Entities.monumentsCollectionSchema current)
{
if (current == null || !_data.Any())
{
return(null);
}
if (_data.First().Equals(current))
{
return(null);
}
return(_data[_data.IndexOf(current) - 1]);
}
/// <summary>
/// Retrieves the next element from source.
/// </summary>
/// <param name="current">Current element</param>
/// <returns>The next element from items, if it exists. Otherwise, returns null</returns>
public Entities.monumentsCollectionSchema Next(Entities.monumentsCollectionSchema current)
{
var data = GetData();
if (current == null)
{
return(data.FirstOrDefault());
}
if (data.Any() && data.Last().Equals(current))
{
return(null);
}
return(data[data.IndexOf(current) + 1]);
}
