/// <summary>
/// Tries to map a property on a DTO to a method on an entity
/// </summary>
/// <param name="entity">The entity</param>
/// <param name="dto">The DTO</param>
/// <param name="dtoProperty">The DTO property</param>
/// <param name="mapNestedDtos">If true, all nested DTOs are mapped</param>
protected virtual void TryMapToMethod(IAggregateEntity entity, ref object dto, PropertyInfo dtoProperty, bool mapNestedDtos = false)
{
var methods = GetMappableMethods(entity);
var candidates = methods.Where
(
_ => _.ReturnType.IsAssignableFrom(dtoProperty.PropertyType) ||
_.ReturnType.ImplementsInterface(typeof(IAggregateEntity))
);
foreach (var method in candidates)
{
var matches = method.Name.Contains(dtoProperty.Name);
if (matches)
{
var result = default(object);
var success = default(bool);
var isAggregate = false;
try
{
result = method.Invoke(entity, null);
success = true;
}
catch (Exception ex)
{
// NOTE: we are ignoring errors when mapping to methods
success = false;
Debug.WriteLine($"Entity Mapping Error: {ex.Message}");
}
if (success)
{
if (result != null)
{
isAggregate = result.GetType().ImplementsInterface(typeof(IAggregateEntity));
}
if (isAggregate)
{
if (mapNestedDtos)
{
var childDto = Activator.CreateInstance(dtoProperty.PropertyType);
Map((IAggregateEntity)result, ref childDto, mapNestedDtos);
dtoProperty.SetValue(dto, childDto);
}
}
else
{
dtoProperty.SetValue(dto, result);
}
}
}
}
}
/// <summary>Determines if two IAggregateEntity instances are similar.</summary>
/// <param name="first">The first IAggregateEntity</param>
/// <param name="second">The second IAggregateEntity</param>
/// <returns>
/// <c>true</c> if the given IAggregateEntity instances are similar; otherwise, <c>false</c>.
/// </returns>
private static Similarity IsSimilarTo(this IAggregateEntity first, IAggregateEntity second)
{
var simResults = from e1 in first
from e2 in second
select e1.IsSimilarTo(e2);
return(Similarity.FromRatio(simResults.Select(x => x.Boolean).PercentTrue() / 100));
}
/// <summary>
/// Tries to map a property on an entity to a property on a DTO
/// </summary>
/// <param name="entity">The entity</param>
/// <param name="dto">The DTO</param>
/// <param name="entityProperty">The entity property</param>
/// <param name="dtoProperty">The DTO property</param>
/// <param name="mapNestedDtos">If true, all nested DTOs are mapped</param>
protected virtual void TryMapProperty
(
IAggregateEntity entity,
ref object dto,
PropertyInfo entityProperty,
PropertyInfo dtoProperty,
bool mapNestedDtos
)
{
var entityPropertyType = entityProperty.PropertyType;
var dtoPropertyType = dtoProperty.PropertyType;
if (dtoPropertyType == entityPropertyType)
{
var entityPropertyValue = entityProperty.GetValue(entity);
var configuration = this.LocaleConfiguration;
if (dtoPropertyType == typeof(DateTime))
{
var date = (DateTime)entityPropertyValue;
entityPropertyValue = date.ToLocalTime(configuration);
}
if (dtoPropertyType == typeof(DateTime?))
{
var date = (DateTime?)entityPropertyValue;
entityPropertyValue = date.ToLocalTime(configuration);
}
dtoProperty.SetValue(dto, entityPropertyValue);
}
else if (dtoPropertyType == typeof(string))
{
var entityPropertyValue = entityProperty.GetValue(entity);
if (entityPropertyValue != null)
{
dtoProperty.SetValue(dto, entityPropertyValue.ToString());
}
else
{
dtoProperty.SetValue(dto, null);
}
}
else if (mapNestedDtos)
{
MapNestedProperty(entity, ref dto, entityProperty, dtoProperty);
}
}
/// <summary>
/// Maps a single entity to a DTO
/// </summary>
/// <param name="entity">The entity to map</param>
/// <param name="dto">The DTO to map to</param>
/// <param name="mapNestedDtos">If true, all nested DTOs are mapped</param>
/// <returns>The mapped DTO</returns>
protected virtual void Map(IAggregateEntity entity, ref object dto, bool mapNestedDtos)
{
if (entity == null)
{
dto = null;
return;
}
else
{
var entityProperties = GetMappableProperties(entity);
var dtoProperties = GetMappableProperties(dto);
var mappedNames = new List <string>();
foreach (var dtoProperty in dtoProperties)
{
var isKeyProperty = dtoProperty.Name.Equals("Key", StringComparison.InvariantCultureIgnoreCase);
if (isKeyProperty)
{
dtoProperty.SetValue(dto, entity.LookupKey);
}
else
{
var alreadyMapped = mappedNames.Contains(dtoProperty.Name);
if (alreadyMapped)
{
continue;
}
var entityProperty = entityProperties.FirstOrDefault(_ => _.Name == dtoProperty.Name);
if (entityProperty != null)
{
TryMapProperty(entity, ref dto, entityProperty, dtoProperty, mapNestedDtos);
}
else
{
TryMapToMethod(entity, ref dto, dtoProperty, mapNestedDtos);
}
mappedNames.Add(dtoProperty.Name);
}
}
}
}
/// <summary>
/// Tries to map a property on a DTO to a property on an entity
/// </summary>
/// <param name="entity">The entity</param>
/// <param name="dto">The DTO</param>
/// <param name="entityProperty">The entity property</param>
/// <param name="dtoProperty">The DTO property</param>
/// <param name="mapNestedDtos">If true, all nested DTOs are mapped</param>
protected virtual void TryMapProperty
(
IAggregateEntity entity,
ref object dto,
PropertyInfo entityProperty,
PropertyInfo dtoProperty,
bool mapNestedDtos
)
{
var dtoPropertyType = dtoProperty.PropertyType;
var entityPropertyValue = entityProperty.GetValue
(
entity
);
if (dtoPropertyType == entityProperty.PropertyType)
{
if (dtoPropertyType == typeof(DateTime))
{
var date = (DateTime)entityPropertyValue;
entityPropertyValue = date.ToLocalTime
(
this.LocaleConfiguration
);
}
if (dtoPropertyType == typeof(DateTime?))
{
var date = (DateTime?)entityPropertyValue;
entityPropertyValue = date.ToLocalTime
(
this.LocaleConfiguration
);
}
dtoProperty.SetValue
(
dto,
entityPropertyValue
);
}
else if (dtoPropertyType == typeof(string))
{
if (entityPropertyValue != null)
{
dtoProperty.SetValue
(
dto,
entityPropertyValue.ToString()
);
}
}
else if (mapNestedDtos)
{
var isList =
(
dtoPropertyType.IsGenericType &&
dtoPropertyType.GetGenericTypeDefinition() == typeof(List <>)
);
if (isList)
{
var dtoListType = dtoPropertyType.GetGenericArguments()[0];
var entityListType = entityProperty.PropertyType.GetGenericArguments()[0];
var isValidDto = IsValidDtoType
(
dtoListType,
entityListType
);
if (false == isValidDto)
{
throw new InvalidOperationException
(
"The list type is not a valid DTO."
);
}
var isValidEntityCollection = entityListType.ImplementsInterface
(
typeof(IAggregateEntity)
);
if (false == isValidEntityCollection)
{
var typeName = entityListType.Name;
var propertyName = entityProperty.Name;
throw new InvalidOperationException
(
$"{typeName} on {propertyName} does not implement IAggregateEntity."
);
}
var dtoList = (IList)Activator.CreateInstance
(
dtoPropertyType
);
var entityCollection = (IEnumerable)entityProperty.GetValue
(
entity
);
foreach (IAggregateEntity childEntity in entityCollection)
{
var childDto = Activator.CreateInstance
(
dtoListType
);
Map(childEntity, ref childDto, mapNestedDtos);
dtoList.Add(childDto);
}
dtoProperty.SetValue(dto, dtoList);
}
else
{
var isValidDto = IsValidDtoType
(
dtoPropertyType,
entityProperty.PropertyType
);
if (isValidDto)
{
var childEntity = (IAggregateEntity)entityProperty.GetValue
(
entity
);
var childDto = Activator.CreateInstance
(
dtoPropertyType
);
Map(childEntity, ref childDto, mapNestedDtos);
dtoProperty.SetValue(dto, childDto);
}
else
{
throw new InvalidOperationException
(
$"The property {dtoProperty.Name} could not be mapped."
);
}
}
}
}
/// <summary>
/// Maps a nested property on an entity to a property on a DTO
/// </summary>
/// <param name="entity">The entity</param>
/// <param name="dto">The DTO</param>
/// <param name="entityProperty">The entity property</param>
/// <param name="dtoProperty">The DTO property</param>
protected virtual void MapNestedProperty
(
IAggregateEntity entity,
ref object dto,
PropertyInfo entityProperty,
PropertyInfo dtoProperty
)
{
var entityPropertyType = entityProperty.PropertyType;
var dtoPropertyType = dtoProperty.PropertyType;
var isList = (dtoPropertyType.IsGenericType && dtoPropertyType.GetGenericTypeDefinition() == typeof(List <>));
if (isList)
{
var dtoListType = dtoPropertyType.GetGenericArguments()[0];
var entityListType = entityPropertyType.GetGenericArguments()[0];
var isValidDto = IsValidDtoType(dtoListType, entityListType);
if (false == isValidDto)
{
throw new InvalidOperationException("The list type is not a valid DTO.");
}
var isValidEntityCollection = entityListType.ImplementsInterface(typeof(IAggregateEntity));
if (false == isValidEntityCollection)
{
var typeName = entityListType.Name;
var propertyName = entityProperty.Name;
throw new InvalidOperationException
(
$"{typeName} on {propertyName} does not implement {nameof(IAggregateEntity)}."
);
}
var dtoList = (IList)Activator.CreateInstance(dtoPropertyType);
var entityCollection = (IEnumerable)entityProperty.GetValue(entity);
foreach (IAggregateEntity childEntity in entityCollection)
{
var childDto = Activator.CreateInstance(dtoListType);
Map(childEntity, ref childDto, true);
dtoList.Add(childDto);
}
dtoProperty.SetValue(dto, dtoList);
}
else
{
var isValidDto = IsValidDtoType(dtoPropertyType, entityPropertyType);
if (isValidDto)
{
var childEntity = (IAggregateEntity)entityProperty.GetValue(entity);
var childDto = Activator.CreateInstance(dtoPropertyType);
Map(childEntity, ref childDto, true);
dtoProperty.SetValue(dto, childDto);
}
else
{
throw new InvalidOperationException
(
$"Property '{dtoProperty.Name}' could not be mapped. " +
$"Type {dtoPropertyType.Name} cannot be converted to " +
$"{entityPropertyType.Name}."
);
}
}
}
