protected void ImplementProxyTargetAccessor(ClassEmitter emitter, FieldReference interceptorsField)
{
var dynProxyGetTarget = emitter.CreateMethod("DynProxyGetTarget", typeof(object));
dynProxyGetTarget.CodeBuilder.AddStatement(
new ReturnStatement(new ConvertExpression(typeof(object), targetType, GetTargetReferenceExpression(emitter))));
var getInterceptors = emitter.CreateMethod("GetInterceptors", typeof(IInterceptor[]));
getInterceptors.CodeBuilder.AddStatement(
new ReturnStatement(interceptorsField));
}
private void CreateFields(ClassEmitter emitter, Type proxyTargetType)
{
base.CreateFields(emitter);
targetField = emitter.CreateField("__target", proxyTargetType);
#if !SILVERLIGHT
emitter.DefineCustomAttributeFor<XmlIgnoreAttribute>(targetField);
#endif
}
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;
}
/// <summary>
/// Generates a parameters constructor that initializes the proxy
/// state with <see cref = "StandardInterceptor" /> just to make it non-null.
/// <para>
/// This constructor is important to allow proxies to be XML serializable
/// </para>
/// </summary>
protected void GenerateParameterlessConstructor(ClassEmitter emitter, Type baseClass, FieldReference interceptorField)
{
// Check if the type actually has a default constructor
var defaultConstructor = baseClass.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, Type.EmptyTypes,
null);
if (defaultConstructor == null)
{
defaultConstructor = baseClass.GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, null, Type.EmptyTypes,
null);
if (defaultConstructor == null || defaultConstructor.IsPrivate)
{
return;
}
}
var constructor = emitter.CreateConstructor();
// initialize fields with an empty interceptor
constructor.CodeBuilder.AddStatement(new AssignStatement(interceptorField,
new NewArrayExpression(1, typeof(IInterceptor))));
constructor.CodeBuilder.AddStatement(
new AssignArrayStatement(interceptorField, 0, new NewInstanceExpression(typeof(StandardInterceptor), new Type[0])));
// Invoke base constructor
constructor.CodeBuilder.InvokeBaseConstructor(defaultConstructor);
constructor.CodeBuilder.AddStatement(new ReturnStatement());
}
