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 (ExplicitlyImplementedInterfaceMethod(method))
{
#if SILVERLIGHT
return null;
#else
return ExplicitlyImplementedInterfaceMethodGenerator(method, @class, options, overrideMethod);
#endif
}
var invocation = GetInvocationType(method, @class, options);
return new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
(c, m) => new TypeTokenExpression(targetType),
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);
}
public virtual void Generate(ClassEmitter @class, ProxyGenerationOptions options)
{
var interceptors = @class.GetField("__interceptors");
ImplementProxyTargetAccessor(@class, interceptors);
foreach (var attribute in targetType.GetNonInheritableAttributes())
{
@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,
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);
}
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();
}
protected virtual Type Init(string typeName, out ClassEmitter emitter, Type proxyTargetType,
out FieldReference interceptorsField, IEnumerable<Type> interfaces)
{
var baseType = ProxyGenerationOptions.BaseTypeForInterfaceProxy;
emitter = BuildClassEmitter(typeName, baseType, interfaces);
CreateFields(emitter, proxyTargetType);
CreateTypeAttributes(emitter);
interceptorsField = emitter.GetField("__interceptors");
return baseType;
}
private MethodGenerator IndirectlyCalledMethodGenerator(MetaMethod method, ClassEmitter proxy,
ProxyGenerationOptions options,
OverrideMethodDelegate overrideMethod)
{
var @delegate = GetDelegateType(method, proxy, options);
var contributor = GetContributor(@delegate, method);
var invocation = new CompositionInvocationTypeGenerator(targetType, method, null, false, contributor)
.Generate(proxy, options, namingScope)
.BuildType();
return new MethodWithInvocationGenerator(method,
proxy.GetField("__interceptors"),
invocation,
(c, m) => c.GetField("__target").ToExpression(),
overrideMethod,
contributor);
}
protected override Expression GetTargetReferenceExpression(ClassEmitter emitter)
{
return emitter.GetField("__target").ToExpression();
}
private MethodGenerator ExplicitlyImplementedInterfaceMethodGenerator(MetaMethod method, ClassEmitter @class,
ProxyGenerationOptions options,
OverrideMethodDelegate overrideMethod)
{
var @delegate = GetDelegateType(method, @class, options);
var contributor = GetContributor(@delegate, method);
var invocation = new InheritanceInvocationTypeGenerator(targetType, method, null, contributor)
.Generate(@class, options, namingScope)
.BuildType();
return new MethodWithInvocationGenerator(method,
@class.GetField("__interceptors"),
invocation,
(c, m) => new TypeTokenExpression(targetType),
overrideMethod,
contributor);
}
private Reference GetTarget(ClassEmitter @class, MethodInfo method)
{
return new AsTypeReference(@class.GetField("__target"), method.DeclaringType);
}