public override object GetValue(object obj, object[] index)
{
//always obj == Owner
var c = (Component_ConvertTo)obj;
object result = c.Source.Value;
//!!!!Metadata.TypeInfo support
//auto convert types
if (result != null && !Type.GetNetType().IsAssignableFrom(result.GetType()))
{
var newValue = MetadataManager.AutoConvertValue(result, Type.GetNetType());
if (newValue == null)
{
newValue = MetadataManager.AutoConvertValue(ReferenceUtility.GetUnreferencedValue(result), Type.GetNetType());
}
result = newValue;
}
//check the type. result can contains value with another type after change the type of property.
if (result != null && !Type.IsAssignableFrom(MetadataManager.MetadataGetType(result)))
{
result = null;
}
if (result == null && Type.GetNetType().IsValueType)
{
result = Type.InvokeInstance(null);
}
return(result);
}
//!!!!rename
public static T GetVariableFromCurrentFlow_Generic <T>(string name)
{
object value = null;
if (CurrentFlow != null)
{
CurrentFlow.variables.TryGetValue(name, out value);
}
var expectedType = typeof(T);
//auto convert types
if (value != null && !expectedType.IsAssignableFrom(value.GetType()))
{
var newValue = MetadataManager.AutoConvertValue(value, expectedType);
if (newValue == null)
{
newValue = MetadataManager.AutoConvertValue(ReferenceUtility.GetUnreferencedValue(value), expectedType);
}
value = newValue;
}
//default for value types
if (value == null && expectedType.IsValueType)
{
value = Activator.CreateInstance(expectedType);
}
return((T)value);
}
static bool FindMethodWithoutEqualParameterTypes(object obj, string name, object[] parameters, out Metadata.Method methodVirtual, out MethodInfo methodNative, out object[] newParameters)
{
methodVirtual = null;
methodNative = null;
newParameters = null;
//!!!!ref, out support
//!!!!default parameters
//virtual, public
var provider = obj as Metadata.IMetadataProvider;
if (provider != null)
{
foreach (var member in provider.MetadataGetMembers())
{
var method = member as Metadata.Method;
if (method != null && method.Name == name)
{
var inputParams = method.GetInputParameters();
if (inputParams.Length == parameters.Length)
{
for (int nParam = 0; nParam < inputParams.Length; nParam++)
{
var demandedType = inputParams[nParam].Type.GetNetType();
var value = parameters[nParam];
if (value != null)
{
if (!demandedType.IsAssignableFrom(value.GetType()) && !MetadataManager.CanAutoConvertType(value.GetType(), demandedType))
{
goto next_member;
}
}
else
{
if (demandedType.IsValueType)
{
goto next_member;
}
}
}
//found
{
methodVirtual = method;
newParameters = new object[inputParams.Length];
for (int nParam = 0; nParam < inputParams.Length; nParam++)
{
var demandedType = inputParams[nParam].Type.GetNetType();
var value = parameters[nParam];
if (value != null)
{
if (demandedType == value.GetType())
{
newParameters[nParam] = value;
}
else if (demandedType.IsAssignableFrom(value.GetType()))
{
newParameters[nParam] = Convert.ChangeType(value, demandedType);
}
else
{
newParameters[nParam] = MetadataManager.AutoConvertValue(value, demandedType);
}
}
}
break;
}
}
}
next_member :;
}
}
//native
if (methodVirtual == null)
{
var bindingFlags = BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static;
if (provider == null)
{
bindingFlags |= BindingFlags.Public;
}
foreach (var method in obj.GetType().GetMethods(bindingFlags))
{
if (method.Name == name)
{
var inputParams = new List <ParameterInfo>();
foreach (var p in method.GetParameters())
{
if (!p.IsRetval)
{
inputParams.Add(p);
}
}
if (inputParams.Count == parameters.Length)
{
for (int nParam = 0; nParam < inputParams.Count; nParam++)
{
var demandedType = inputParams[nParam].ParameterType;
var value = parameters[nParam];
if (value != null)
{
if (!demandedType.IsAssignableFrom(value.GetType()) && !MetadataManager.CanAutoConvertType(value.GetType(), demandedType))
{
goto next_member2;
}
}
else
{
if (demandedType.IsValueType)
{
goto next_member2;
}
}
}
//found
{
methodNative = method;
newParameters = new object[inputParams.Count];
for (int nParam = 0; nParam < inputParams.Count; nParam++)
{
var demandedType = inputParams[nParam].ParameterType;
var value = parameters[nParam];
if (value != null)
{
if (demandedType == value.GetType())
{
newParameters[nParam] = value;
}
else if (demandedType.IsAssignableFrom(value.GetType()))
{
newParameters[nParam] = Convert.ChangeType(value, demandedType);
}
else
{
newParameters[nParam] = MetadataManager.AutoConvertValue(value, demandedType);
}
}
}
break;
}
}
}
next_member2 :;
}
}
return(methodVirtual != null || methodNative != null);
}