private string parseNestedPropertyNameFromMemberExpression <T>(Expression <Func <T, object> > memberExpression)
{
DB.throwIfNullOrEmpty <MappingException>(memberExpression, "Member expression");
MemberExpression propertyMemberExpression = null;
string nestedPropertyName;
if (memberExpression.Body is MemberExpression)
{
propertyMemberExpression = (memberExpression.Body as MemberExpression);
}
else if (memberExpression.Body is UnaryExpression) // value typelar objecte cast edildiği için member expression, unary (cast) expression içerisinde yeralıyor
{
UnaryExpression unaryExpression = (memberExpression.Body as UnaryExpression);
if (unaryExpression.Operand is MemberExpression)
{
propertyMemberExpression = (unaryExpression.Operand as MemberExpression);
}
}
DB.throwIfNullOrEmpty <MappingException>(propertyMemberExpression, "Property member expression");
int firstDotPosition = propertyMemberExpression.ToString().IndexOf(".", StringComparison.Ordinal);
nestedPropertyName = propertyMemberExpression.ToString().Substring(firstDotPosition + 1);
PropertyInfo propertyInfo = (propertyMemberExpression.Member as PropertyInfo);
DB.throwIfNullOrEmpty <MappingException>(propertyInfo, "Property info");
//mesela DateTime.Now gibi birşey girilmişse entity tipinin bir nested property'si olmadığı için hata verecek
if (typeof(T) != getOutermostTypeFromNestedMemberExpression(propertyMemberExpression))
{
throw new MappingException("Property is in not a direct or nested property of the entity type.");
}
entityMapping.NestedPropertyInfoCacheAtMapper.Add(nestedPropertyName, propertyInfo);
PropertyGetter getter = PropertyGetterSetterFactory.CreateGetter(propertyInfo);
entityMapping.NestedPropertyGetterCacheAtMapper.Add(nestedPropertyName, getter);
PropertySetter setter = PropertyGetterSetterFactory.CreateSetter(propertyInfo);
entityMapping.NestedPropertySetterCacheAtMapper.Add(nestedPropertyName, setter);
entityMapping.GenerateRootTypePropertyNamePropertyInfoAndGetterSetterCacheEntryAtMapper(typeof(T), nestedPropertyName);
return(nestedPropertyName);
}