/// <summary>Ensures set contain only elements that are present either in the current set or in the specified collection, but not both.</summary>
/// <param name="source">The current set.</param>
/// <param name="other">The collection to compare to the current set.</param>
/// <returns>A new set if there is any modification to current sealed set; otherwise, the current set.</returns>
public static IModels SymmetricExcept(this IModels source, IModels other)
{
source.VerifyNotNull(nameof(source));
other.VerifyNotNull(nameof(other));
IModels removedModelSet = Models.Empty;
foreach (var item in source)
{
if (other.Contains(item))
{
removedModelSet = removedModelSet.Add(item);
source = source.Remove(item);
}
}
foreach (var item in other)
{
if (removedModelSet.Contains(item))
{
source = source.Add(item);
}
}
return(source);
}
/// <summary>Ensures set contain all elements that are present in either the current set or in the specified collection.</summary>
/// <param name="source">The current set.</param>
/// <param name="other">The collection to add elements from.</param>
/// <returns>A new set if there is any modification to current set and current set sealed; otherwise, the current set.</returns>
public static IModels Union(this IModels source, IModels other)
{
source.VerifyNotNull(nameof(source));
other.VerifyNotNull(nameof(other));
foreach (var item in other)
{
source = source.Add(item);
}
return(source);
}
private void AddSourceModel(Model model)
{
Debug.Assert(!_sourceModels.Contains(model));
_sourceModels = _sourceModels.Add(model);
if (_autoColumnSelector == null)
{
_autoColumnSelector = model.Columns;
}
else
{
_autoColumnSelector = _autoColumnSelector.Merge(model.Columns);
}
}
/// <summary>
/// Create a <see cref="IModels"/> object which contains specified <see cref="Model"/> values.
/// </summary>
/// <param name="values">The specified <see cref="Model"/> values.</param>
/// <returns>The created result.</returns>
public static IModels New(params Model[] values)
{
values.VerifyNotNull(nameof(values));
if (values.Length == 0)
{
return(Empty);
}
IModels result = values.VerifyNotNull(0, nameof(values));
for (int i = 1; i < values.Length; i++)
{
result = result.Add(values.VerifyNotNull(i, nameof(values)));
}
return(result);
}