-
Notifications
You must be signed in to change notification settings - Fork 466
/
InterfaceMembersOnClassCollector.cs
80 lines (69 loc) · 3.02 KB
/
InterfaceMembersOnClassCollector.cs
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
71
72
73
74
75
76
77
78
79
80
// Copyright 2004-2021 Castle Project - http://www.castleproject.org/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
namespace Castle.DynamicProxy.Contributors
{
using System;
using System.Reflection;
using Castle.DynamicProxy.Generators;
internal class InterfaceMembersOnClassCollector : MembersCollector
{
private readonly InterfaceMapping map;
private readonly bool onlyProxyVirtual;
public InterfaceMembersOnClassCollector(Type type, bool onlyProxyVirtual, InterfaceMapping map) : base(type)
{
this.onlyProxyVirtual = onlyProxyVirtual;
this.map = map;
}
protected override MetaMethod GetMethodToGenerate(MethodInfo method, IProxyGenerationHook hook, bool isStandalone)
{
var methodOnTarget = GetMethodOnTarget(method);
if (onlyProxyVirtual)
{
// The (somewhat confusingly named) `onlyProxyVirtual` flag may need some explaining.
//
// This collector type is used in two distinct scenarios:
//
// 1. When generating a class proxy for some class `T` which implements interface `I`,
// and `I` is again specified as an additional interface to add to the proxy type.
// In this case, this collector gets invoked for `I` and `onlyProxyVirtual == true`,
// and below logic prevents `I` methods from being implemented a second time when
// the main "target" contributor already took care of them (which happens when they
// are overridable, or more specifically, when they are implicitly implemented and
// marked as `virtual`).
//
// 2. When generating an interface proxy with target for some interface `I` and target
// type `T`. In this case, `onlyProxyVirtual == false`, which forces members of `I`
// to get implemented. Unlike in (1), the target of such proxies will be separate
// objects, so it doesn't matter if & how they implement members of `I` or not;
// those `I` members still need to be implemented on the proxy type regardless.
var isVirtuallyImplementedInterfaceMethod = methodOnTarget != null && methodOnTarget.IsFinal == false;
if (isVirtuallyImplementedInterfaceMethod)
{
return null;
}
}
var proxyable = AcceptMethod(method, onlyProxyVirtual, hook);
return new MetaMethod(method, methodOnTarget, isStandalone, proxyable, methodOnTarget.IsPrivate == false);
}
private MethodInfo GetMethodOnTarget(MethodInfo method)
{
var index = Array.IndexOf(map.InterfaceMethods, method);
if (index == -1)
{
return null;
}
return map.TargetMethods[index];
}
}
}