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using System;
using System.Runtime.InteropServices;
using LibGit2Sharp.Core;
namespace LibGit2Sharp
{
/// <summary>
/// A GitObject
/// </summary>
public class GitObject : IEquatable<GitObject>
{
internal static GitObjectTypeMap TypeToTypeMap =
new GitObjectTypeMap
{
{typeof (Commit), GitObjectType.Commit},
{typeof (Tree), GitObjectType.Tree},
{typeof (Blob), GitObjectType.Blob},
{typeof (TagAnnotation), GitObjectType.Tag},
{typeof (GitObject), GitObjectType.Any},
};
private static readonly LambdaEqualityHelper<GitObject> equalityHelper =
new LambdaEqualityHelper<GitObject>(new Func<GitObject, object>[] {x => x.Id});
/// <summary>
/// Initializes a new instance of the <see cref="GitObject"/> class.
/// </summary>
/// <param name="id">The <see cref="ObjectId"/> it should be identified by.</param>
protected GitObject(ObjectId id)
{
Id = id;
}
/// <summary>
/// Gets the id of this object
/// </summary>
public ObjectId Id { get; private set; }
/// <summary>
/// Gets the 40 character sha1 of this object.
/// </summary>
public string Sha
{
get { return Id.Sha; }
}
internal static GitObject CreateFromPtr(IntPtr obj, ObjectId id, Repository repo)
{
try
{
var type = NativeMethods.git_object_type(obj);
switch (type)
{
case GitObjectType.Commit:
return Commit.BuildFromPtr(obj, id, repo);
case GitObjectType.Tree:
return Tree.BuildFromPtr(obj, id, repo);
case GitObjectType.Tag:
return TagAnnotation.BuildFromPtr(obj, id);
case GitObjectType.Blob:
return Blob.BuildFromPtr(obj, id, repo);
default:
return new GitObject(id);
}
}
finally
{
NativeMethods.git_object_close(obj);
}
}
internal static ObjectId ObjectIdOf(IntPtr obj)
{
var ptr = NativeMethods.git_object_id(obj);
return new ObjectId((GitOid)Marshal.PtrToStructure(ptr, typeof(GitOid)));
}
/// <summary>
/// Determines whether the specified <see cref="Object"/> is equal to the current <see cref="GitObject"/>.
/// </summary>
/// <param name="obj">The <see cref="Object"/> to compare with the current <see cref="GitObject"/>.</param>
/// <returns>True if the specified <see cref="Object"/> is equal to the current <see cref="GitObject"/>; otherwise, false.</returns>
public override bool Equals(object obj)
{
return Equals(obj as GitObject);
}
/// <summary>
/// Determines whether the specified <see cref="GitObject"/> is equal to the current <see cref="GitObject"/>.
/// </summary>
/// <param name="other">The <see cref="GitObject"/> to compare with the current <see cref="GitObject"/>.</param>
/// <returns>True if the specified <see cref="GitObject"/> is equal to the current <see cref="GitObject"/>; otherwise, false.</returns>
public bool Equals(GitObject other)
{
return equalityHelper.Equals(this, other);
}
/// <summary>
/// Returns the hash code for this instance.
/// </summary>
/// <returns>A 32-bit signed integer hash code.</returns>
public override int GetHashCode()
{
return equalityHelper.GetHashCode(this);
}
/// <summary>
/// Tests if two <see cref="GitObject"/> are equal.
/// </summary>
/// <param name="left">First <see cref="GitObject"/> to compare.</param>
/// <param name="right">Second <see cref="GitObject"/> to compare.</param>
/// <returns>True if the two objects are equal; false otherwise.</returns>
public static bool operator ==(GitObject left, GitObject right)
{
return Equals(left, right);
}
/// <summary>
/// Tests if two <see cref="GitObject"/> are different.
/// </summary>
/// <param name="left">First <see cref="GitObject"/> to compare.</param>
/// <param name="right">Second <see cref="GitObject"/> to compare.</param>
/// <returns>True if the two objects are different; false otherwise.</returns>
public static bool operator !=(GitObject left, GitObject right)
{
return !Equals(left, right);
}
}
}
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