private MethodGenerator ExplicitlyImplementedInterfaceMethodGenerator(
MetaMethod method,
ClassEmitter @class,
OverrideMethodDelegate overrideMethod
)
{
var @delegate = GetDelegateType(method, @class);
var contributor = GetContributor(@delegate, method);
var invocation = new InheritanceInvocationTypeGenerator(
targetType,
method,
null,
contributor
)
.Generate(@class, namingScope)
.BuildType();
return(new MethodWithInvocationGenerator(
method,
@class.GetField("__interceptors"),
invocation,
(c, m) => new TypeTokenExpression(targetType),
overrideMethod,
contributor
));
}
protected override MethodGenerator GetMethodGenerator(MetaMethod method, ClassEmitter @class,
OverrideMethodDelegate overrideMethod)
{
if (methodsToSkip.Contains(method.Method))
{
return(null);
}
if (!method.Proxyable)
{
return(new MinimialisticMethodGenerator(method,
overrideMethod));
}
if (ExplicitlyImplementedInterfaceMethod(method))
{
return(ExplicitlyImplementedInterfaceMethodGenerator(method, @class, overrideMethod));
}
var invocation = GetInvocationType(method, @class);
GetTargetExpressionDelegate getTargetTypeExpression = (c, m) => new TypeTokenExpression(targetType);
return(new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
getTargetTypeExpression,
getTargetTypeExpression,
overrideMethod,
null));
}
protected override void CustomizeGetObjectData(
CodeBuilder codebuilder,
ArgumentReference serializationInfo,
ArgumentReference streamingContext,
ClassEmitter emitter
)
{
var targetField = emitter.GetField("__target");
codebuilder.AddStatement(
new MethodInvocationExpression(
serializationInfo,
SerializationInfoMethods.AddValue_Object,
new LiteralStringExpression("__targetFieldType"),
new LiteralStringExpression(
targetField.Reference.FieldType.AssemblyQualifiedName
)
)
);
codebuilder.AddStatement(
new MethodInvocationExpression(
serializationInfo,
SerializationInfoMethods.AddValue_Object,
new LiteralStringExpression("__theInterface"),
new LiteralStringExpression(targetType.AssemblyQualifiedName)
)
);
}
protected override MethodGenerator GetMethodGenerator(
MetaMethod method,
ClassEmitter @class,
OverrideMethodDelegate overrideMethod
)
{
if (!method.Proxyable)
{
return(new ForwardingMethodGenerator(
method,
overrideMethod,
(c, i) => fields[i.DeclaringType]
));
}
var invocation = GetInvocationType(method, @class);
return(new MethodWithInvocationGenerator(
method,
@class.GetField("__interceptors"),
invocation,
getTargetExpression,
overrideMethod,
null
));
}
protected override MethodGenerator GetMethodGenerator(MetaMethod method, ClassEmitter @class,
ProxyGenerationOptions options,
OverrideMethodDelegate overrideMethod)
{
if (methodsToSkip.Contains(method.Method))
{
return(null);
}
if (!method.Proxyable)
{
return(new MinimialisticMethodGenerator(method,
overrideMethod));
}
if (IsDirectlyAccessible(method) == false)
{
return(IndirectlyCalledMethodGenerator(method, @class, options, overrideMethod));
}
var invocation = GetInvocationType(method, @class, options);
return(new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
(c, m) => c.GetField("__target").ToExpression(),
overrideMethod,
null));
}
private Expression SetMethodInterceptors(ClassEmitter @class, INamingScope namingScope, MethodEmitter emitter, Expression proxiedMethodTokenExpression)
{
var selector = @class.GetField("__selector");
if (selector == null)
{
return(null);
}
var methodInterceptorsField = BuildMethodInterceptorsField(@class, MethodToOverride, namingScope);
var emptyInterceptors = new NewArrayExpression(0, typeof(IInterceptor));
var selectInterceptors = new MethodInvocationExpression(selector, InterceptorSelectorMethods.SelectInterceptors,
new MethodInvocationExpression(null,
TypeUtilMethods.GetTypeOrNull,
getTargetExpression(@class, MethodToOverride)),
proxiedMethodTokenExpression, interceptors.ToExpression())
{
VirtualCall = true
};
emitter.CodeBuilder.AddExpression(
new IfNullExpression(methodInterceptorsField,
new AssignStatement(methodInterceptorsField,
new NullCoalescingOperatorExpression(selectInterceptors, emptyInterceptors))));
return(methodInterceptorsField.ToExpression());
}
private MethodGenerator IndirectlyCalledMethodGenerator(
MetaMethod method,
ClassEmitter proxy,
OverrideMethodDelegate overrideMethod,
bool skipInterceptors = false
)
{
var @delegate = GetDelegateType(method, proxy);
var contributor = GetContributor(@delegate, method);
var invocation = new CompositionInvocationTypeGenerator(
targetType,
method,
null,
false,
contributor
)
.Generate(proxy, namingScope)
.BuildType();
return(new MethodWithInvocationGenerator(
method,
skipInterceptors ? NullExpression.Instance : proxy.GetField("__interceptors"),
invocation,
(c, m) => c.GetField("__target"),
overrideMethod,
contributor
));
}
private Expression[] GetCtorArguments(ClassEmitter @class, INamingScope namingScope,
Expression proxiedMethodTokenExpression, TypeReference[] dereferencedArguments)
{
var selector = @class.GetField("__selector");
if (selector != null)
{
return(new[]
{
getTargetExpression(@class, MethodToOverride),
SelfReference.Self.ToExpression(),
interceptors.ToExpression(),
proxiedMethodTokenExpression,
new ReferencesToObjectArrayExpression(dereferencedArguments),
selector.ToExpression(),
new AddressOfReferenceExpression(BuildMethodInterceptorsField(@class, MethodToOverride, namingScope))
});
}
return(new[]
{
getTargetExpression(@class, MethodToOverride),
SelfReference.Self.ToExpression(),
interceptors.ToExpression(),
proxiedMethodTokenExpression,
new ReferencesToObjectArrayExpression(dereferencedArguments)
});
}
public void Generate(ClassEmitter emitter)
{
var interceptorsField = emitter.GetField("__interceptors");
var targetReference = getTargetReference();
var dynProxyGetTarget = emitter.CreateMethod(nameof(IProxyTargetAccessor.DynProxyGetTarget), typeof(object));
dynProxyGetTarget.CodeBuilder.AddStatement(
new ReturnStatement(new ConvertExpression(typeof(object), targetType, targetReference)));
var dynProxySetTarget = emitter.CreateMethod(nameof(IProxyTargetAccessor.DynProxySetTarget), typeof(void), typeof(object));
// we can only change the target of the interface proxy
if (targetReference is FieldReference targetField)
{
dynProxySetTarget.CodeBuilder.AddStatement(
new AssignStatement(targetField,
new ConvertExpression(targetField.FieldBuilder.FieldType, dynProxySetTarget.Arguments[0])));
}
else
{
dynProxySetTarget.CodeBuilder.AddStatement(
new ThrowStatement(typeof(InvalidOperationException), "Cannot change the target of the class proxy."));
}
dynProxySetTarget.CodeBuilder.AddStatement(new ReturnStatement());
var getInterceptors = emitter.CreateMethod(nameof(IProxyTargetAccessor.GetInterceptors), typeof(IInterceptor[]));
getInterceptors.CodeBuilder.AddStatement(
new ReturnStatement(interceptorsField));
}
public override void Generate(ClassEmitter @class, ProxyGenerationOptions options)
{
var interceptors = @class.GetField("__interceptors");
ImplementProxyTargetAccessor(@class, interceptors);
foreach (var attribute in targetType.GetNonInheritableAttributes())
{
@class.DefineCustomAttribute(attribute);
}
}
public virtual void Generate(ClassEmitter @class, ProxyGenerationOptions options)
{
var interceptors = @class.GetField("__interceptors");
ImplementGetObjectData(@class);
ImplementProxyTargetAccessor(@class, interceptors);
foreach (var attribute in targetType.GetTypeInfo().GetNonInheritableAttributes())
{
@class.DefineCustomAttribute(attribute.Builder);
}
}
/// <summary>
/// Generates the class defined by the provided class emitter.
/// </summary>
/// <param name="class">
/// The <see cref="Castle.DynamicProxy.Generators.Emitters.ClassEmitter"/>
/// being used to build the target type.
/// </param>
/// <param name="options">The options to use during proxy generation.</param>
/// <exception cref="System.ArgumentNullException">
/// Thrown if <paramref name="class" /> is <see langword="null" />.
/// </exception>
/// <remarks>
/// <para>
/// This overridden version of the method does everything that the base
/// <see cref="Castle.DynamicProxy.Contributors.ProxyInstanceContributor.Generate"/>
/// method does but it skips the part where it checks for non-inherited
/// attributes and copies them over from the proxy target.
/// </para>
/// </remarks>
public override void Generate(ClassEmitter @class, ProxyGenerationOptions options)
{
if (@class == null)
{
throw new ArgumentNullException("class");
}
FieldReference field = @class.GetField("__interceptors");
this.ImplementGetObjectData(@class);
this.ImplementProxyTargetAccessor(@class, field);
}
protected virtual Type Init(string typeName, out ClassEmitter emitter, Type proxyTargetType, out FieldReference interceptorsField, IEnumerable <Type> interfaces)
{
Type baseType = ProxyGenerationOptions.BaseTypeForInterfaceProxy;
emitter = BuildClassEmitter(typeName, baseType, interfaces);
CreateFields(emitter, proxyTargetType);
CreateTypeAttributes(emitter);
interceptorsField = emitter.GetField("__interceptors");
return(baseType);
}
public virtual void Generate(ClassEmitter @class, ProxyGenerationOptions options)
{
var interceptors = @class.GetField("__interceptors");
//#if FEATURE_SERIALIZATION
ImplementGetObjectData(@class);
//#endif
ImplementProxyTargetAccessor(@class, interceptors);
foreach (var attribute in targetType.GetNonInheritableAttributes())
{
@class.DefineCustomAttribute(attribute);
}
}
protected override void CreateFields(ClassEmitter emitter)
{
base.CreateFields(emitter);
var interceptorsField = emitter.GetField(InterceptorsFieldName);
if (interceptorsField != null)
{
emitter.DefineCustomAttributeFor <IgnoreDataMemberAttribute>(interceptorsField);
CreateMetadataProperty(emitter, interceptorsField);
}
}
public virtual void Generate(ClassEmitter @class, ProxyGenerationOptions options)
{
var interceptors = @class.GetField("__interceptors");
#if !SILVERLIGHT
ImplementGetObjectData(@class);
#endif
ImplementProxyTargetAccessor(@class, interceptors);
foreach (var attribute in AttributeUtil.GetNonInheritableAttributes(targetType))
{
@class.DefineCustomAttribute(attribute);
}
}
protected override MethodGenerator GetMethodGenerator(MetaMethod method, ClassEmitter @class,
ProxyGenerationOptions options,
OverrideMethodDelegate overrideMethod)
{
var invocation = GetInvocationType(method, @class, options);
return(new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
(c, m) => c.GetField("__target").ToExpression(),
overrideMethod,
null));
}
protected override MethodGenerator GetMethodGenerator(
MetaMethod method,
ClassEmitter @class,
OverrideMethodDelegate overrideMethod
)
{
if (method.Ignore)
{
return(null);
}
var methodIsDirectlyAccessible = IsDirectlyAccessible(method);
if (!method.Proxyable)
{
if (methodIsDirectlyAccessible)
{
return(new ForwardingMethodGenerator(
method,
overrideMethod,
(c, m) => c.GetField("__target")
));
}
else
{
return(IndirectlyCalledMethodGenerator(
method,
@class,
overrideMethod,
skipInterceptors: true
));
}
}
if (!methodIsDirectlyAccessible)
{
return(IndirectlyCalledMethodGenerator(method, @class, overrideMethod));
}
var invocation = GetInvocationType(method, @class);
return(new MethodWithInvocationGenerator(
method,
@class.GetField("__interceptors"),
invocation,
(c, m) => c.GetField("__target"),
overrideMethod,
null
));
}
protected override MethodGenerator GetMethodGenerator(MetaMethod method, ClassEmitter @class, ProxyGenerationOptions options, OverrideMethodDelegate overrideMethod)
{
if (!method.Proxyable)
{
return(new MinimialisticMethodGenerator(method, overrideMethod));
}
var invocation = GetInvocationType(method, @class, options);
return(new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
getTargetExpression,
overrideMethod,
null));
}
protected override MethodGenerator GetMethodGenerator(MetaMethod method, ClassEmitter @class, ProxyGenerationOptions options, CreateMethodDelegate createMethod)
{
if (!method.Proxyable)
{
return(new ForwardingMethodGenerator(method,
createMethod,
(c, m) => c.GetField("__target")));
}
var invocation = GetInvocationType(method, @class, options);
return(new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
(c, m) => c.GetField("__target").ToExpression(),
createMethod));
}
public override void Generate(ClassEmitter @class)
{
var interceptors = @class.GetField("__interceptors");
#if FEATURE_SERIALIZATION
if (implementISerializable)
{
ImplementGetObjectData(@class);
Constructor(@class);
}
#endif
ImplementProxyTargetAccessor(@class, interceptors);
foreach (var attribute in targetType.GetNonInheritableAttributes())
{
@class.DefineCustomAttribute(attribute.Builder);
}
}
public override void Generate(ClassEmitter @class, ProxyGenerationOptions options)
{
var interceptors = @class.GetField("__interceptors");
#if !SILVERLIGHT
if (implementISerializable)
{
ImplementGetObjectData(@class);
Constructor(@class);
}
#endif
ImplementProxyTargetAccessor(@class, interceptors);
foreach (var attribute in targetType.GetNonInheritableAttributes())
{
@class.DefineCustomAttribute(attribute);
}
}
private void ImplementChangeProxyTarget(AbstractTypeEmitter invocation, ClassEmitter @class)
{
var changeInvocationTarget = invocation.CreateMethod("ChangeProxyTarget", typeof(void), new[] { typeof(object) });
changeInvocationTarget.CodeBuilder.AddStatement(
new ExpressionStatement(
new ConvertExpression(@class.TypeBuilder, new FieldReference(InvocationMethods.ProxyObject).ToExpression())));
var field = @class.GetField("__target");
changeInvocationTarget.CodeBuilder.AddStatement(
new AssignStatement(
new FieldReference(field.Reference)
{
OwnerReference = null
},
new ConvertExpression(field.Fieldbuilder.FieldType, changeInvocationTarget.Arguments[0].ToExpression())));
changeInvocationTarget.CodeBuilder.AddStatement(new ReturnStatement());
}
protected override MethodGenerator GetMethodGenerator(MetaMethod method, ClassEmitter @class, ProxyGenerationOptions options, CreateMethodDelegate createMethod)
{
if (methodsToSkip.Contains(method.Method))
{
return(null);
}
if (!method.Proxyable)
{
return(new MinimialisticMethodGenerator(method,
createMethod));
}
var invocation = GetInvocationType(method, @class, options);
return(new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
(c, m) => new TypeTokenExpression(targetType),
createMethod));
}
private void ImplementChangeProxyTarget(AbstractTypeEmitter invocation, ClassEmitter @class)
{
#if !NETFX_CORE
var changeInvocationTarget = invocation.CreateMethod("ChangeProxyTarget", typeof(void), new[] { typeof(object) });
changeInvocationTarget.CodeBuilder.AddStatement(
new ExpressionStatement(
new ConvertExpression(@class.TypeBuilder,
new FieldReference(InvocationMethods.ProxyObject.AsFieldInfo()).ToExpression())));
var field = @class.GetField("__target");
changeInvocationTarget.CodeBuilder.AddStatement(
new AssignStatement(
new FieldReference(field.Reference)
{
OwnerReference = null
},
new ConvertExpression(field.Fieldbuilder.FieldType, changeInvocationTarget.Arguments[0].ToExpression())));
changeInvocationTarget.CodeBuilder.AddStatement(new ReturnStatement());
#else
throw new NotImplementedException("This operation has not been implemented.");
#endif
}
private Reference GetTarget(ClassEmitter @class, MethodInfo method)
{
return(new AsTypeReference(@class.GetField("__target"), method.DeclaringType));
}
protected void ImplementGetObjectData(ClassEmitter emitter)
{
var getObjectData = emitter.CreateMethod(
"GetObjectData",
typeof(void),
new[] { typeof(SerializationInfo), typeof(StreamingContext) }
);
var info = getObjectData.Arguments[0];
var typeLocal = getObjectData.CodeBuilder.DeclareLocal(typeof(Type));
getObjectData.CodeBuilder.AddStatement(
new AssignStatement(
typeLocal,
new MethodInvocationExpression(
null,
TypeMethods.StaticGetType,
new LiteralStringExpression(
typeof(ProxyObjectReference).AssemblyQualifiedName
),
new LiteralBoolExpression(true),
new LiteralBoolExpression(false)
)
)
);
getObjectData.CodeBuilder.AddStatement(
new MethodInvocationExpression(info, SerializationInfoMethods.SetType, typeLocal)
);
foreach (var field in emitter.GetAllFields())
{
if (field.Reference.IsStatic)
{
continue;
}
if (field.Reference.IsNotSerialized)
{
continue;
}
AddAddValueInvocation(info, getObjectData, field);
}
var interfacesLocal = getObjectData.CodeBuilder.DeclareLocal(typeof(string[]));
getObjectData.CodeBuilder.AddStatement(
new AssignStatement(
interfacesLocal,
new NewArrayExpression(interfaces.Length, typeof(string))
)
);
for (var i = 0; i < interfaces.Length; i++)
{
getObjectData.CodeBuilder.AddStatement(
new AssignArrayStatement(
interfacesLocal,
i,
new LiteralStringExpression(interfaces[i].AssemblyQualifiedName)
)
);
}
getObjectData.CodeBuilder.AddStatement(
new MethodInvocationExpression(
info,
SerializationInfoMethods.AddValue_Object,
new LiteralStringExpression("__interfaces"),
interfacesLocal
)
);
getObjectData.CodeBuilder.AddStatement(
new MethodInvocationExpression(
info,
SerializationInfoMethods.AddValue_Object,
new LiteralStringExpression("__baseType"),
new LiteralStringExpression(emitter.BaseType.AssemblyQualifiedName)
)
);
getObjectData.CodeBuilder.AddStatement(
new MethodInvocationExpression(
info,
SerializationInfoMethods.AddValue_Object,
new LiteralStringExpression("__proxyGenerationOptions"),
emitter.GetField("proxyGenerationOptions")
)
);
getObjectData.CodeBuilder.AddStatement(
new MethodInvocationExpression(
info,
SerializationInfoMethods.AddValue_Object,
new LiteralStringExpression("__proxyTypeId"),
new LiteralStringExpression(proxyTypeId)
)
);
CustomizeGetObjectData(
getObjectData.CodeBuilder,
info,
getObjectData.Arguments[1],
emitter
);
getObjectData.CodeBuilder.AddStatement(new ReturnStatement());
}
protected override Reference GetTargetReference(ClassEmitter emitter)
{
return(emitter.GetField("__target"));
}
protected override Expression GetTargetReferenceExpression(ClassEmitter emitter)
{
return(emitter.GetField("__target").ToExpression());
}
protected void ImplementGetObjectData(ClassEmitter emitter)
{
var serializationInfo = new ArgumentReference(typeof(SerializationInfo));
var streamingContext = new ArgumentReference(typeof(StreamingContext));
MethodEmitter getObjectData = emitter.CreateMethod("GetObjectData", serializationInfo, streamingContext);
LocalReference typeLocal = getObjectData.CodeBuilder.DeclareLocal(typeof(Type));
getObjectData.CodeBuilder.AddStatement(
new AssignStatement(
typeLocal,
new MethodInvocationExpression(
null,
TypeMethods.StaticGetType,
new ConstReference(typeof(ProxyObjectReference).AssemblyQualifiedName).ToExpression(),
new ConstReference(1).ToExpression(),
new ConstReference(0).ToExpression())));
getObjectData.CodeBuilder.AddStatement(
new ExpressionStatement(
new MethodInvocationExpression(
serializationInfo,
SerializationInfoMethods.SetType,
typeLocal.ToExpression())));
foreach (var field in emitter.GetAllFields())
{
if (field.Reference.IsStatic)
{
continue;
}
if (field.Reference.IsNotSerialized)
{
continue;
}
AddAddValueInvocation(serializationInfo, getObjectData, field);
}
LocalReference interfacesLocal = getObjectData.CodeBuilder.DeclareLocal(typeof(string[]));
getObjectData.CodeBuilder.AddStatement(
new AssignStatement(
interfacesLocal,
new NewArrayExpression(interfaces.Length, typeof(string))));
for (int i = 0; i < interfaces.Length; i++)
{
getObjectData.CodeBuilder.AddStatement(
new AssignArrayStatement(
interfacesLocal,
i,
new ConstReference(interfaces[i].AssemblyQualifiedName).ToExpression()));
}
getObjectData.CodeBuilder.AddStatement(
new ExpressionStatement(
new MethodInvocationExpression(
serializationInfo,
SerializationInfoMethods.AddValue_Object,
new ConstReference("__interfaces").ToExpression(),
interfacesLocal.ToExpression())));
getObjectData.CodeBuilder.AddStatement(
new ExpressionStatement(
new MethodInvocationExpression(
serializationInfo,
SerializationInfoMethods.AddValue_Object,
new ConstReference("__baseType").ToExpression(),
new ConstReference(emitter.BaseType.AssemblyQualifiedName).ToExpression())));
getObjectData.CodeBuilder.AddStatement(
new ExpressionStatement(
new MethodInvocationExpression(
serializationInfo,
SerializationInfoMethods.AddValue_Object,
new ConstReference("__proxyGenerationOptions").ToExpression(),
emitter.GetField("proxyGenerationOptions").ToExpression())));
getObjectData.CodeBuilder.AddStatement(
new ExpressionStatement(
new MethodInvocationExpression(serializationInfo,
SerializationInfoMethods.AddValue_Object,
new ConstReference("__proxyTypeId").ToExpression(),
new ConstReference(proxyTypeId).ToExpression())));
CustomizeGetObjectData(getObjectData.CodeBuilder, serializationInfo, streamingContext, emitter);
getObjectData.CodeBuilder.AddStatement(new ReturnStatement());
}