/// <summary>
/// Initializes a new instance of the <see cref="DeltaLister{TItem}"/> class.
/// </summary>
/// <param name="oldList">The old list.</param>
/// <param name="newList">The new list.</param>
/// <param name="getItemId">The get item identifier.</param>
/// <param name="options">The options.</param>
/// <exception cref="ArgumentNullException">
/// oldList or newList or getItemId or oldItem or oldItemId or newItem is null.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">newItemId</exception>
/// <exception cref="DuplicateNameException">newItemId</exception>
public DeltaLister(IEnumerable <TItem> oldList, IEnumerable <TItem> newList,
Func <TItem, long?> getItemId, DeltaOptions options = DeltaOptions.Default)
{
_options = options;
_oldItems = oldList ?? throw new ArgumentNullException("oldList");
_newItems = newList ?? throw new ArgumentNullException("newList");
_getItemId = getItemId ?? throw new ArgumentNullException("getItemId");
_oldById = new Dictionary <long, TItem>();
_newById = new HashSet <long>();
foreach (var item in oldList)
{
if (item == null)
{
throw new ArgumentNullException("oldItem");
}
var id = getItemId(item);
if (id == null)
{
throw new ArgumentNullException("oldItemId");
}
_oldById.Add(id.Value, item);
}
foreach (var item in newList)
{
if (item == null)
{
throw new ArgumentNullException("newItem");
}
var id = getItemId(item);
if (id != null)
{
if (!_oldById.ContainsKey(id.Value))
{
if ((_options & DeltaOptions.IgnoreInvalidNewId) != DeltaOptions.IgnoreInvalidNewId)
{
throw new ArgumentOutOfRangeException("newItemId");
}
}
if (_newById.Contains(id.Value))
{
throw new ArgumentException("newItemId");
}
_newById.Add(id.Value);
}
}
}
private static int RunDelta(DeltaOptions options)
{
foreach (var anon in Anons)
{
if (anon.Key != "Q")
{
continue;
}
Console.WriteLine($"Report for {anon.Key}:");
PrintDeltas(TrumpTweets, anon.Value);
}
return(0);
}
public DeltaLister(IEnumerable <TItem> oldList, IEnumerable <TItem> newList,
Func <TItem, Int64?> getItemId, DeltaOptions options = DeltaOptions.Default)
{
if (oldList == null)
{
throw new ArgumentNullException("oldList");
}
if (newList == null)
{
throw new ArgumentNullException("newList");
}
if (getItemId == null)
{
throw new ArgumentNullException("getItemId");
}
_options = options;
_oldItems = oldList;
_newItems = newList;
_getItemId = getItemId;
_oldById = new Dictionary <Int64, TItem>();
_newById = new HashSet <Int64>();
foreach (var item in oldList)
{
if (item == null)
{
throw new ArgumentNullException("oldItem");
}
var id = getItemId(item);
if (id == null)
{
throw new ArgumentNullException("oldItemId");
}
_oldById.Add(id.Value, item);
}
foreach (var item in newList)
{
if (item == null)
{
throw new ArgumentNullException("newItem");
}
var id = getItemId(item);
if (id != null)
{
if (!_oldById.ContainsKey(id.Value))
{
if ((_options & DeltaOptions.IgnoreInvalidNewId) != DeltaOptions.IgnoreInvalidNewId)
{
throw new ArgumentOutOfRangeException("newItemId");
}
}
if (_newById.Contains(id.Value))
#if COREFX
{ throw new ArgumentException("newItemId"); }
#else
{ throw new DuplicateNameException("newItemId"); }
#endif
_newById.Add(id.Value);
}
}
}
