private static void ConvertPropertyValue(PropertyConvertContext context)
{
if (!context.Options.Convert(context))
{
context.Value = ConvertPropertyValue(context.Value, context.SourceProperty.Type, context.TargetProperty.Type, context.TargetProperty, context);
}
}
private static void SetPropertyValue(ModelPropertyInfo mp1, PropertyConvertContext context, object state)
{
if (!mp1.IsCollection /*|| mp1.Type.IsAssignableFrom(value.GetType()) && !mp1.IsReadOnly*/)
{
SetValueScalar(context);
}
else
{
SetValueCollection(context);
}
}
internal static void WalkConvertiblProperties(object target, ModelInfo targetInfo, object source, ModelInfo sourceInfo,
ModelConvertOptions options, Action <ModelPropertyInfo, PropertyConvertContext, object> callback, object state)
{
foreach (var mp1 in targetInfo.Properties)
{
var mp0 = MapProperty(mp1, sourceInfo, options);
if (mp0.Length > 0 && options.ShouldSetValue(mp1))
{
PropertyConvertContext context = new PropertyConvertContext(source, mp0, target, mp1, GetValue(mp0, source), options);
callback(mp1, context, state);
}
}
}
private static bool CheckReadOnly(PropertyConvertContext context)
{
if (context.TargetProperty.IsReadOnly)
{
if (!context.Options.ShouldIgnoreReadOnly(context.TargetProperty))
{
throw new InvalidOperationException($"The property {context.TargetModel.ModelType}.{context.TargetProperty.Name} is read-only.");
}
else
{
return(true);
}
}
return(false);
}
internal bool Convert(PropertyConvertContext context)
{
var source = GetSourceProperty(context.SourceProperty);
var ok = false;
if (source != null && source.Converter != null)
{
context.Value = source.Converter(context.Value, context);
ok = true;
}
else
{
var options = GetTargetProperty(context.TargetProperty);
if (options != null && options.Converter != null)
{
context.Value = options.Converter(context.Value, context);
ok = true;
}
}
return(ok);
}
private static void SetValueScalar(PropertyConvertContext context)
{
if (CheckReadOnly(context))
{
return;
}
ConvertPropertyValue(context);
object value = context.Value;
if (value == null)
{
Type type = context.TargetProperty.Type;
if (!type.CanBeNull())
{
value = context.Options.GetDefaultValue(context) ?? type.DefaltValue();
//throw new InvalidOperationException($"Try to set null value to a property which cannot be null. Property = {mp1.PropertyInfo.DeclaringType}.{mp1.Name}");
}
}
context.TargetProperty.SetValue(context.Target, value);
}
private static object ConvertPropertyValue(object source, Type sourceType, Type targetType, ModelPropertyInfo property, PropertyConvertContext context)
{
if (source == null || targetType.IsAssignableFrom(sourceType))
{
return(source);
}
TypeConverter converter;
if (property == null)
{
converter = TypeDescriptor.GetConverter(targetType);
}
else
{
converter = property.GetConverter();
}
if (converter != null && converter.CanConvertTo(targetType))
{
return(converter.ConvertTo(source, targetType));
}
Type type;
if ((type = Nullable.GetUnderlyingType(targetType)) != null)
{
if (type == source.GetType())
{
return(source);
}
}
try
{
return(System.Convert.ChangeType(source, targetType));
}
catch
{
}
if (sourceType.IsClass && targetType.IsClass)
{
return(Convert(source, sourceType, targetType, context.Options));
}
throw new InvalidOperationException($"Cannot convert type from {source.GetType()} to {targetType}.");
}
private static void SetValueCollection(PropertyConvertContext context)
{
var collInfo = context.TargetProperty.CollectionInfo;
ArrayList coll0;
bool man = collInfo.SupportManipulation;
if (!context.SourceProperty.IsCollection)
{
throw new InvalidOperationException($"The source property {context.SourceModel.ModelType}.{context.SourceProperty.Name} is not a collection type.");
}
if (context.Value != null)
{
var wrapper = context.SourceProperty.CollectionInfo.CreateWrapper(context.Value);
var filter = context.Options.GetFilter(context.SourceProperty);
coll0 = new ArrayList(wrapper.Count);
foreach (object v in wrapper)
{
if (filter?.Invoke(v, context) ?? true)
{
var tv = ConvertPropertyValue(v, context.SourceProperty.CollectionInfo.ElementType ?? typeof(object), collInfo.ElementType ?? typeof(object), null, context);
coll0.Add(tv);
}
}
}
else
{
SetValueScalar(context);
return;
}
if (collInfo.IsArray)
{
man = false;
context.Value = coll0.ToArray(collInfo.ElementType ?? typeof(object));
SetValueScalar(context);
}
else if (man)
{
var tv = context.TargetProperty.GetValue(context.Target);
ICollectionWrapper coll1;
if (tv != null)
{
coll1 = collInfo.CreateWrapper(tv);
coll1.Clear();
}
else
{
coll1 = collInfo.CreateWrapper();
}
foreach (object v in coll0)
{
coll1.Add(v);
}
if (tv == null)
{
context.Value = coll1.RawCollection;
SetValueScalar(context);
}
}
else
{
throw new NotSupportedException("Collection type conversion for " + context.TargetProperty.Type + " is not supported yet.");
}
//if (collInfo.SupportManipulation)
//{
// object tv = context.TargetProperty.GetValue(context.TargetProperty);
// if (tv != null)
// {
// var coll1 = collInfo.CreateWrapper(tv);
// coll1.Clear();
// if (coll0 != null)
// {
// foreach (object v in coll0)
// coll1.Add(v);
// }
// return;
// }
//}
//if (CheckReadOnly(context))
// return;
//if (coll0 == null)
//{
// SetValueScalar(context);
// return;
//}
//object value;
//// 如果是数组，创建一个新的数组并赋值。
//if (collInfo.IsArray)
//{
// Array array = Array.CreateInstance(collInfo.ElementType, coll0.Count);
// int index = 0;
// foreach (var v in coll0)
// array.SetValue(v, index);
// value = array;
// return;
//}
//if (collInfo.ObjectType.IsInterface)
//{
// // 如果是接口，创建一个List`1或ArrayList
// IList list;
//}
//else
//{
// // 直接创建集合的实例，并进行逐一添加
// value = ModelInfo.GetModelInfo(collInfo.ObjectType).CreateInstance();
//}
}
internal object GetDefaultValue(PropertyConvertContext context)
{
return(GetTargetProperty(context.TargetProperty)?.DefaultValue);
}
