-
-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Updated ObjectFactory implementation to use Expression with memoizati…
…on to create new object instead of Activator.
- Loading branch information
1 parent
d5806e7
commit e34e562
Showing
2 changed files
with
25 additions
and
32 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,40 +1,33 @@ | ||
using System.Runtime.CompilerServices; | ||
using System.Linq.Expressions; | ||
using System.Reflection; | ||
using System.Runtime.Serialization; | ||
|
||
#pragma warning disable CS1591 | ||
|
||
namespace Ogooreck.Factories; | ||
|
||
/// <summary> | ||
/// Wraps objects creation | ||
/// </summary> | ||
/// <typeparam name="T"></typeparam> | ||
public static class ObjectFactory<T> | ||
{ | ||
/// <summary> | ||
/// Creates empty unitialised instance of object T | ||
/// </summary> | ||
/// <returns></returns> | ||
public static T GetUnitialized() => | ||
(T)RuntimeHelpers.GetUninitializedObject(typeof(T)); | ||
public static readonly Func<T> GetDefaultOrUninitialized = Creator(); | ||
|
||
/// <summary> | ||
/// Creates empty unitialised instance of object T | ||
/// </summary> | ||
/// <returns></returns> | ||
public static T? GetDefault() | ||
private static Func<T> Creator() | ||
{ | ||
try | ||
{ | ||
return (T?)Activator.CreateInstance(typeof(T), true); | ||
} | ||
catch (MissingMethodException? e) | ||
{ | ||
Console.WriteLine(e); | ||
return default; | ||
} | ||
var t = typeof(T); | ||
if (t == typeof(string)) | ||
return Expression.Lambda<Func<T>>(Expression.Constant(string.Empty)).Compile(); | ||
|
||
if (t.HasDefaultConstructor()) | ||
return Expression.Lambda<Func<T>>(Expression.New(t)).Compile(); | ||
|
||
return () => (T)FormatterServices.GetUninitializedObject(t); | ||
} | ||
} | ||
|
||
/// <summary> | ||
/// Creates empty unitialised instance of object T | ||
/// </summary> | ||
/// <returns></returns> | ||
public static T GetDefaultOrUninitialized() | ||
=> GetDefault() ?? GetUnitialized(); | ||
public static class ObjectFactory | ||
{ | ||
public static bool HasDefaultConstructor(this Type t) | ||
{ | ||
return t.IsValueType || t.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, | ||
null, Type.EmptyTypes, null) != null; | ||
} | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters