public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (binder == null)
{
throw new ArgumentNullException("binder");
}
var dynamicObject = Model as RazorDynamicObject;
if (dynamicObject != null)
{
return(dynamicObject.TryGetMember(binder, out result));
}
Type modelType = Model.GetType();
var prop = modelType.GetProperty(binder.Name);
if (prop == null)
{
if (!AllowMissingPropertiesOnDynamic)
{
result = null;
return(false);
}
result = new RazorDynamicObject()
{
AllowMissingPropertiesOnDynamic = AllowMissingPropertiesOnDynamic, Model = new object()
};
return(true);
}
object value = prop.GetValue(Model, null);
if (value == null)
{
result = value;
return(true);
}
Type valueType = value.GetType();
result = (CompilerServicesUtility.IsAnonymousType(valueType))
? new RazorDynamicObject {
Model = value
}
: value;
return(true);
}
/// <summary>
/// Create a wrapper around an dynamic object.
/// This wrapper ensures that we can cross the <see cref="AppDomain"/>,
/// call internal methods (to make Anonymous types work),
/// or call missing methods (when allowMissingMembers is true).
/// </summary>
/// <param name="wrapped">The object to wrap.</param>
/// <param name="allowMissingMembers">true when we should not throw when missing members are invoked.</param>
/// <returns>the wrapped object.</returns>
public static object Create(object wrapped, bool allowMissingMembers = false)
{
if (IsWrapped(wrapped))
{
return(wrapped);
}
var wrapper = new RazorDynamicObject(wrapped, allowMissingMembers);
var interfaces =
wrapped.GetType().GetInterfaces()
.Where(t => t.IsPublic && t != typeof(IDynamicMetaObjectProvider))
.Select(MapInterface).ToArray();
if (interfaces.Length > 0)
{
return(Impromptu.DynamicActLike(wrapper, interfaces));
}
return(wrapper);
}
/// <summary>
/// Create a wrapper around an dynamic object.
/// This wrapper ensures that we can cross the <see cref="AppDomain"/>,
/// call internal methods (to make Anonymous types work),
/// or call missing methods (when allowMissingMembers is true).
/// </summary>
/// <param name="wrapped">The object to wrap.</param>
/// <param name="allowMissingMembers">true when we should not throw when missing members are invoked.</param>
/// <returns>the wrapped object.</returns>
public static object Create(object wrapped, bool allowMissingMembers = false)
{
if (IsWrapped(wrapped))
{
return(wrapped);
}
var wrapper = new RazorDynamicObject(wrapped, allowMissingMembers);
var interfaces =
wrapped.GetType().GetInterfaces()
// remove IDynamicMetaObjectProvider and ISerializable interfaces because ActLikeProxy does already implement them
.Where(t => t.IsPublic && t != typeof(IDynamicMetaObjectProvider) && t != typeof(ISerializable))
.Select(MapInterface).ToArray();
if (interfaces.Length > 0)
{
return(Impromptu.DynamicActLike(wrapper, interfaces));
}
return(wrapper);
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (binder == null)
throw new ArgumentNullException("binder");
var dynamicObject = Model as RazorDynamicObject;
if (dynamicObject != null)
return dynamicObject.TryGetMember(binder, out result);
Type modelType = Model.GetType();
var prop = modelType.GetProperty(binder.Name);
if (prop == null)
{
if (!AllowMissingPropertiesOnDynamic)
{
result = null;
return false;
}
result = new RazorDynamicObject() { AllowMissingPropertiesOnDynamic = AllowMissingPropertiesOnDynamic, Model = new object() };
return true;
}
object value = prop.GetValue(Model, null);
if (value == null)
{
result = value;
return true;
}
Type valueType = value.GetType();
result = (CompilerServicesUtility.IsAnonymousType(valueType))
? new RazorDynamicObject { Model = value }
: value;
return true;
}
/// <summary>
/// Tries to find a member with the given name, the given arguments
/// and the given parameter types and invokes that member.
/// </summary>
/// <param name="typeToSearch">the type we search for that member.</param>
/// <param name="name">the name of the member</param>
/// <param name="args">the arguments of the member</param>
/// <param name="paramTypes">the type of the arguments of the member</param>
/// <param name="result">the result of invoking the found member.</param>
/// <returns>true if a member was found and invoked.</returns>
private bool TryFindInvokeMember(Type typeToSearch, string name, object[] args, Type[] paramTypes, out object result)
{
var members = typeToSearch.GetMember(name, RazorDynamicObject.Flags);
var found = false;
result = null;
foreach (var member in members)
{
var methodInfo = member as MethodInfo;
if (!found && methodInfo != null && RazorDynamicObject.CompatibleWith(methodInfo.GetParameters(), paramTypes))
{
result = methodInfo.Invoke(_component, args);
found = true;
break;
}
var property = member as PropertyInfo;
if (!found && property != null)
{
var setMethod = property.GetSetMethod(true);
if (setMethod != null && RazorDynamicObject.CompatibleWith(setMethod.GetParameters(), paramTypes))
{
result = setMethod.Invoke(_component, args);
found = true;
break;
}
var getMethod = property.GetGetMethod(true);
if (getMethod != null && RazorDynamicObject.CompatibleWith(getMethod.GetParameters(), paramTypes))
{
result = getMethod.Invoke(_component, args);
found = true;
break;
}
}
}
return(found);
}
public object GetResult(Invocation invocation)
{
(new PermissionSet(PermissionState.Unrestricted)).Assert();
object result = null;
string name = invocation.Name.Name;
object[] args = invocation.Args;
Type[] paramTypes = args.Select(o => o.GetType()).ToArray();
try
{
if (invocation.Kind == InvocationKind.NotSet && invocation.Name.Name == "_BinaryOperator")
{ // We use that for operators
var exp = (ExpressionType)args[0];
object other = args[1];
result = Impromptu.InvokeBinaryOperator(_component, exp, other);
}
else if (invocation.Kind == InvocationKind.NotSet && invocation.Name.Name == "_UnaryOperator")
{ // We use that for operators
var exp = (ExpressionType)args[0];
result = Impromptu.InvokeUnaryOperator(exp, _component);
}
else
{
// First we try to resolve via DLR
dynamic target = _component;
result = invocation.InvokeWithStoredArgs(_component);
}
}
catch (RuntimeBinderException)
{
// DLR doesn't like some kind of functions,
// expecially because we have casted the component to object...
bool found = false;
switch (invocation.Kind)
{
case InvocationKind.Convert:
var targetType = (Type)args[0];
bool tExplict = false;
if (args.Length == 2)
{
tExplict = (bool)args[1];
}
// try to find explicit or implicit operator.
try
{
result = DynamicCast(_component, targetType);
found = true;
}
catch (Exception)
{
found = false;
}
break;
//case InvocationKind.IsEvent:
//case InvocationKind.AddAssign:
//case InvocationKind.SubtractAssign:
//case InvocationKind.Invoke:
//case InvocationKind.InvokeAction:
//case InvocationKind.InvokeUnknown:
//case InvocationKind.InvokeMember: // TODO: add testcase
//case InvocationKind.InvokeMemberAction: // TODO: add testcase
//case InvocationKind.GetIndex: // TODO: add testcase
//case InvocationKind.SetIndex: // TODO: add testcase
case InvocationKind.Get:
case InvocationKind.Set:
case InvocationKind.InvokeMemberUnknown:
{
if (!found)
{
if (!TryFindInvokeMember(_runtimeType, name, args, paramTypes, out result))
{
// search all interfaces as well
foreach (var @interface in _runtimeType.GetInterfaces().Where(i => i.IsPublic))
{
if (TryFindInvokeMember(@interface, name, args, paramTypes, out result))
{
found = true;
break;
}
}
}
else
{
found = true;
}
}
}
break;
default:
break;
}
if (!found)
{
if (_allowMissing)
{
return(RazorDynamicObject.Create("", _allowMissing));
}
throw;
}
}
if (RazorDynamicObject.IsPrimitive(result))
{
return(result);
}
else
{
return(RazorDynamicObject.Create(result, _allowMissing));
}
}