/// <summary>
/// Gets from cache (or creates and adds to cache) the <see cref="IODataMapper"/> (with option to merge alternate property configuration).
/// </summary>
private static IODataMapper GetOrCreateMapper(Type type, Dictionary <string, MemberInfo> altProps, string overrideEntityName)
{
if (_cache.TryGetValue(type, out IODataMapper map))
{
return(map);
}
lock (_lock)
{
if (_cache.TryGetValue(type, out map))
{
return(map);
}
if (!type.IsClass)
{
throw new MapperException($"Type '{type.Name}' must be a class for auto-mapping.");
}
var mea = type.GetCustomAttributes(typeof(MapperEntityAttribute), true).OfType <MapperEntityAttribute>().FirstOrDefault();
map = (IODataMapper)Activator.CreateInstance(typeof(ODataMapper <>).MakeGenericType(type), (overrideEntityName ?? mea?.Name) ?? type.Name);
var pe = Expression.Parameter(type, "x");
string dname = null;
var hasProperties = false;
MapperPropertyAttribute mpa = null;
foreach (var p in TypeReflector.GetProperties(type))
{
// Do not auto-map where the Ignore attribute has been specified.
if (p.GetCustomAttributes(typeof(MapperIgnoreAttribute), true).OfType <MapperIgnoreAttribute>().FirstOrDefault() != null)
{
continue;
}
// Get property merge config.
if (altProps == null)
{
mpa = p.GetCustomAttributes(typeof(MapperPropertyAttribute), true).OfType <MapperPropertyAttribute>().FirstOrDefault();
dname = mpa?.Name;
}
else
{
if (!altProps.TryGetValue(p.Name, out MemberInfo alt))
{
throw new InvalidOperationException($"Type '{type.Name}' Property '{p.Name}' does not have an alternative property configuration specified.");
}
// Do not auto-map where the Ignore attribute has been specified.
if (alt.GetCustomAttributes(typeof(MapperIgnoreAttribute), true).OfType <MapperIgnoreAttribute>().FirstOrDefault() != null)
{
continue;
}
mpa = alt.GetCustomAttributes(typeof(MapperPropertyAttribute), true).OfType <MapperPropertyAttribute>().FirstOrDefault();
dname = mpa?.Name ?? alt.Name;
}
// Create the lambda expression for the property and add to the mapper.
hasProperties = true;
var lex = Expression.Lambda(Expression.Property(pe, p.Name), pe);
var pmap = (IODataPropertyMapper)map.GetType()
.GetMethod("Property", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly)
.MakeGenericMethod(p.PropertyType)
.Invoke(map, new object[] { lex, dname, mpa == null ? OperationTypes.Any : mpa.OperationTypes });
if (mpa == null)
{
continue;
}
// Apply auto-map Property attribute IsUnique configuration.
if (mpa.IsUniqueKey)
{
pmap.SetUniqueKey(mpa.IsUniqueKeyAutoGeneratedOnCreate);
}
// Apply auto-map Property attribute ConverterType configuration.
if (mpa.ConverterType != null)
{
if (!typeof(IPropertyMapperConverter).IsAssignableFrom(mpa.ConverterType))
{
throw new MapperException($"Type '{type.Name}' Property '{p.Name}' has 'MapperPropertyAttribute' with ConverterType set to '{mpa.ConverterType.Name}' which does not implement 'IPropertyMapperConverter'.");
}
IPropertyMapperConverter pmc = null;
var pdef = mpa.ConverterType.GetProperty("Default", BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.Static);
if (pdef == null)
{
if (mpa.ConverterType.GetConstructor(Type.EmptyTypes) == null)
{
throw new MapperException($"Type '{type.Name}' Property '{p.Name}' has 'MapperPropertyAttribute' with ConverterType set to '{mpa.ConverterType.Name}' does not have a static 'Default' property or default constructor.");
}
pmc = (IPropertyMapperConverter)Activator.CreateInstance(mpa.ConverterType);
}
else
{
pmc = (IPropertyMapperConverter)pdef.GetValue(null);
}
pmap.SetConverter(pmc);
continue;
}
// Apply auto-map Property attribute MapperType configuration for complex types.
if (pmap.IsSrceComplexType)
{
IEntityMapperBase em = null;
if (mpa.MapperType == null)
{
em = GetMapper(pmap.SrceComplexTypeReflector.ItemType);
}
else
{
if (!typeof(IEntityMapperBase).IsAssignableFrom(mpa.MapperType))
{
throw new MapperException($"Type '{type.Name}' Property '{p.Name}' has 'MapperPropertyAttribute' with MapperType set to '{mpa.MapperType.Name}' which does not implement 'IEntityMapper'.");
}
var mdef = mpa.MapperType.GetProperty("Default", BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.Static);
if (mdef == null)
{
if (mpa.ConverterType.GetConstructor(Type.EmptyTypes) == null)
{
throw new MapperException($"Type '{type.Name}' Property '{p.Name}' has 'MapperPropertyAttribute' with MapperType set to '{mpa.MapperType.Name}' does not have a static 'Default' property or default constructor.");
}
em = (IEntityMapperBase)Activator.CreateInstance(mpa.MapperType);
}
else
{
em = (IEntityMapperBase)mdef.GetValue(null);
}
}
if (em != null)
{
pmap.SetMapper(em);
}
}
else if (mpa.MapperType != null)
{
throw new MapperException($"Type '{type.Name}' Property '{p.Name}' has 'MapperPropertyAttribute' with MapperType set to '{mpa.ConverterType.Name}' although the property is not a complex type.");
}
}
if (!hasProperties)
{
throw new MapperException($"AutoMapper has found no properties for Type '{type.Name}' that it is able to auto-map.");
}
_cache.Add(type, map);
return(map);
}
}
public static T MapTo <T>(this object from, params object[] ctorParameters)
where T : class
{
if (from != null)
{
ConstructorInfo ctor = typeof(T).GetConstructor(ctorParameters.Select(p => p.GetType()).ToArray());
if (ctor == null)
{
throw new ArgumentException("Invalid Constructor Parameters");
}
T result = (T)ctor.Invoke(ctorParameters);
IEnumerable <PropertyInfo> properties = from.GetType().GetProperties()
.Where(p => p.CanRead && !p.IsDefined(typeof(MapperIgnoreAttribute)));
foreach (PropertyInfo property in properties)
{
try
{
MapperPropertyAttribute propAttribute = property.GetCustomAttribute <MapperPropertyAttribute>();
PropertyInfo resultProp = typeof(T).GetRuntimeProperty(
propAttribute?.PropertyName ?? property.Name
);
if (
resultProp != null &&
!resultProp.IsDefined(typeof(MapperIgnoreAttribute)) &&
resultProp.CanWrite
)
{
if (TypeDescriptor.GetConverter(property.PropertyType).CanConvertTo(resultProp.PropertyType))
{
resultProp.SetValue(result, Convert.ChangeType(property.GetValue(from), resultProp.PropertyType));
}
else if (property.PropertyType == typeof(string))
{
if (resultProp.PropertyType == typeof(int))
{
resultProp.SetValue(result, int.Parse(property.GetValue(from).ToString()));
}
else if (resultProp.PropertyType == typeof(DateTime))
{
resultProp.SetValue(result, DateTime.Parse(property.GetValue(from).ToString()));
}
else if (resultProp.PropertyType == typeof(bool))
{
resultProp.SetValue(result, bool.Parse(property.GetValue(from).ToString()));
}
else if (resultProp.PropertyType == typeof(double))
{
resultProp.SetValue(result, double.Parse(property.GetValue(from).ToString()));
}
else if (resultProp.PropertyType == typeof(float))
{
resultProp.SetValue(result, float.Parse(property.GetValue(from).ToString()));
}
}
}
}
catch (Exception) { }
}
return(result);
}
else
{
return(null);
}
}
