public static CodeStatement CreateToSourceAssignmentMethod(
TranslateAttribute attr,
CodeVariableDeclarationStatement toSource,
PropertyInfo toSourceProperty, CodeParameterDeclarationExpression fromTargetParam,
Func<Type, Type, TranslateAttribute> getTypesTranslateAttributeFn)
{
var fromTargetProperty = attr.TargetType.GetProperty(toSourceProperty.Name);
var cantReadFromTarget = fromTargetProperty.GetGetMethod() == null;
if (cantReadFromTarget)
{
return new CodeCommentStatement(string.Format("Skipping property 'to.{0}' because 'model.{1}' is write-only",
toSourceProperty.Name, fromTargetProperty.Name));
}
var cantWriteToSource = toSourceProperty.GetSetMethod() == null;
if (cantWriteToSource)
{
return new CodeCommentStatement(string.Format("Skipping property 'to.{0}' because 'to.{1}' is read-only",
toSourceProperty.Name, toSourceProperty.Name));
}
//to[property.Name] = this[property.Name] e.g:
// to.Name = from.Name;
if (fromTargetProperty.PropertyType.IsAssignableFrom(toSourceProperty.PropertyType))
{
return toSource.Assign(
toSource.RefProperty(toSourceProperty.Name),
fromTargetParam.Name.RefArgument().RefProperty(toSourceProperty.Name));
}
//to[property.Name] = from[property.PropertyType.Name].ToTarget() e.g:
//to.Address = from.Address.ToTarget();
var toSourcePropertyType = toSourceProperty.PropertyType;
var fromTargetPropertyType = fromTargetProperty.PropertyType;
var targetAttr = getTypesTranslateAttributeFn(toSourcePropertyType, fromTargetPropertyType);
var useExtensionMethods = attr is TranslateExtensionAttribute;
var isTargetTranslatableAlso = targetAttr != null;
if (isTargetTranslatableAlso)
{
var toSourceMethodName = targetAttr.GetConvertToSourceMethodName();
var method = useExtensionMethods
? fromTargetParam.RefProperty(toSourceProperty.Name).Call(toSourceMethodName)
: toSourcePropertyType.Call(toSourceMethodName, fromTargetParam.RefProperty(toSourceProperty.Name));
return toSource.Assign(toSourceProperty.Name, method);
}
var fromSourceIsGenericList = toSourcePropertyType.IsGenericType && toSourcePropertyType.GetGenericTypeDefinition() == typeof(List<>);
var toTargetIsGenericList = fromTargetPropertyType.IsGenericType && fromTargetPropertyType.GetGenericTypeDefinition() == typeof(List<>);
var bothAreGenericLists = fromSourceIsGenericList && toTargetIsGenericList;
if (bothAreGenericLists)
{
//to.PhoneNumbers = from.PhoneNumbers.ToPhoneNumbers();
var propertyListItemTypeAttr = getTypesTranslateAttributeFn(toSourcePropertyType.GetGenericArguments()[0], fromTargetPropertyType.GetGenericArguments()[0]);
var sourceIsTranslatable = propertyListItemTypeAttr != null;
if (sourceIsTranslatable)
{
var toSourcesMethodName = propertyListItemTypeAttr.GetConvertToSourcesMethodName();
var method = useExtensionMethods
? fromTargetParam.RefProperty(fromTargetProperty.Name).Call(toSourcesMethodName)
: propertyListItemTypeAttr.SourceType.Call(toSourcesMethodName, fromTargetParam.RefProperty(fromTargetProperty.Name));
return toSource.RefProperty(toSourceProperty.Name).Assign(method);
}
}
//to[property.Name] = this[property.Name].ToString() e.g:
// to.Name = from.Name;
if (toSourceProperty.PropertyType == typeof(string)
&& StringConverterUtils.CanCreateFromString(fromTargetProperty.PropertyType))
{
var fromTargetPropertyRef = fromTargetParam.Name.RefArgument().RefProperty(toSourceProperty.Name);
return fromTargetPropertyRef.IfIsNotNull(
toSource.Assign(
toSource.RefProperty(toSourceProperty.Name),
fromTargetPropertyRef.Call("ToString")));
}
// Converting 'System.Collections.Generic.List`1 PhoneNumbers' to 'System.Collections.Generic.List`1 PhoneNumbers' is unsupported
return new CodeCommentStatement(string.Format("Converting '{0}.{1} {2}' to '{3}.{4} {5}' is unsupported"
, toSourceProperty.PropertyType.Namespace, toSourceProperty.PropertyType.Name, toSourceProperty.Name
, fromTargetProperty.PropertyType.Namespace, fromTargetProperty.PropertyType.Name, fromTargetProperty.Name));
}