forked from ThatRendle/Simple.Data
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathProviderAssemblyAttributeBase.cs
More file actions
70 lines (63 loc) · 2.72 KB
/
ProviderAssemblyAttributeBase.cs
File metadata and controls
70 lines (63 loc) · 2.72 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
namespace Simple.Data.Ado
{
[AttributeUsage(AttributeTargets.Assembly)]
public abstract class ProviderAssemblyAttributeBase : Attribute
{
static ProviderAssemblyAttributeBase()
{
//AppDomain.CurrentDomain.ReflectionOnlyAssemblyResolve += CurrentDomainOnReflectionOnlyAssemblyResolve;
}
private static Assembly CurrentDomainOnReflectionOnlyAssemblyResolve(object sender, ResolveEventArgs args)
{
return Assembly.Load(args.Name);
}
private readonly HashSet<string> _adoProviderNames;
protected ProviderAssemblyAttributeBase(string providerName, params string[] additionalProviderNames)
{
_adoProviderNames = new HashSet<string>(additionalProviderNames, StringComparer.InvariantCultureIgnoreCase) {providerName};
}
public bool IsForProviderName(string adoProviderName)
{
return _adoProviderNames.Contains(adoProviderName);
}
public abstract bool TryGetProvider(string connectionString, out IConnectionProvider provider, out Exception exception);
public static IEnumerable<ProviderAssemblyAttributeBase> Get(Assembly assembly)
{
if (assembly.ReflectionOnly)
{
foreach (var referencedAssembly in assembly.GetReferencedAssemblies())
{
if (AppDomain.CurrentDomain.ReflectionOnlyGetAssemblies().All(a => a.GetFullName() != referencedAssembly.FullName))
{
try
{
Assembly.ReflectionOnlyLoad(referencedAssembly.FullName);
}
catch (FileNotFoundException)
{
return Enumerable.Empty<ProviderAssemblyAttributeBase>();
}
}
}
var hasAttribute = assembly.GetCustomAttributesData().Any(
cad => typeof (ProviderAssemblyAttributeBase).IsAssignableFrom(cad.Constructor.DeclaringType));
if (hasAttribute)
{
assembly = Assembly.Load(assembly.GetFullName());
}
else
{
return Enumerable.Empty<ProviderAssemblyAttributeBase>();
}
}
return assembly.GetCustomAttributes(typeof (ProviderAssemblyAttributeBase), false)
.Cast<ProviderAssemblyAttributeBase>();
}
}
}