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using System.Collections;
using System.Collections.Generic;
using System.Linq;
namespace LibGit2Sharp
{
/// <summary>
/// Criterias used to filter out and order the commits of the repository when querying its history.
/// </summary>
public sealed class CommitFilter
{
/// <summary>
/// Initializes a new instance of <see cref="CommitFilter"/>.
/// </summary>
public CommitFilter()
{
SortBy = CommitSortStrategies.Time;
Since = "HEAD";
FirstParentOnly = false;
}
/// <summary>
/// The ordering stragtegy to use.
/// <para>
/// By default, the commits are shown in reverse chronological order.
/// </para>
/// </summary>
public CommitSortStrategies SortBy { get; set; }
/// <summary>
/// A pointer to a commit object or a list of pointers to consider as starting points.
/// <para>
/// Can be either a <see cref="string"/> containing the sha or reference canonical name to use,
/// a <see cref="Branch"/>, a <see cref="Reference"/>, a <see cref="Commit"/>, a <see cref="Tag"/>,
/// a <see cref="TagAnnotation"/>, an <see cref="ObjectId"/> or even a mixed collection of all of the above.
/// By default, the <see cref="Repository.Head"/> will be used as boundary.
/// </para>
/// </summary>
public object Since { get; set; }
internal IList<object> SinceList
{
get { return ToList(Since); }
}
/// <summary>
/// A pointer to a commit object or a list of pointers which will be excluded (along with ancestors) from the enumeration.
/// <para>
/// Can be either a <see cref="string"/> containing the sha or reference canonical name to use,
/// a <see cref="Branch"/>, a <see cref="Reference"/>, a <see cref="Commit"/>, a <see cref="Tag"/>,
/// a <see cref="TagAnnotation"/>, an <see cref="ObjectId"/> or even a mixed collection of all of the above.
/// </para>
/// </summary>
public object Until { get; set; }
internal IList<object> UntilList
{
get { return ToList(Until); }
}
/// <summary>
/// Whether to limit the walk to each commit's first parent, instead of all of them
/// </summary>
public bool FirstParentOnly { get; set; }
private static IList<object> ToList(object obj)
{
var list = new List<object>();
if (obj == null)
{
return list;
}
var types = new[]
{
typeof(string), typeof(ObjectId),
typeof(Commit), typeof(TagAnnotation),
typeof(Tag), typeof(Branch), typeof(DetachedHead),
typeof(Reference), typeof(DirectReference), typeof(SymbolicReference)
};
if (types.Contains(obj.GetType()))
{
list.Add(obj);
return list;
}
list.AddRange(((IEnumerable)obj).Cast<object>());
return list;
}
}
}
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