private static void MapProperties(PropertyMapInfo propMapInfo, IMapperConfiguration mapperConfiguration)
{
var sourceType = propMapInfo.SourceType;
var sourceProperty = propMapInfo.SourcePropertyInfos;
var destinationType = propMapInfo.DestinationType;
var destinationPropertyInfo = propMapInfo.DestinationPropertyInfo;
var createMapMethod = mapperConfiguration == null?GenericCreateMapStaticApi.MakeGenericMethod(sourceType, destinationType) : GenericCreateMap.MakeGenericMethod(sourceType, destinationType);
var mapObject = createMapMethod.Invoke(mapperConfiguration ?? null, new object[] {});
var mapObjectExpression = Expression.Constant(mapObject);
var sourceParameter = Expression.Parameter(sourceType);
var destinationParameter = Expression.Parameter(destinationType);
var destinationMember = Expression.Lambda(
Expression.Convert(
Expression.Property(destinationParameter, destinationPropertyInfo),
typeof(object)
),
destinationParameter
);
var memberConfigType = typeof(IMemberConfigurationExpression <>).MakeGenericType(sourceType);
var memberConfigTypeParameter = Expression.Parameter(memberConfigType);
var finalPropertyType = sourceProperty.Last().PropertyType;
var propertyExpression = sourceProperty.Aggregate <PropertyInfo, Expression>(null, (current, prop) => current == null ? Expression.Property(sourceParameter, prop) : Expression.Property(current, prop));
var memberOptions = Expression.Call(memberConfigTypeParameter,
nameof(IMemberConfigurationExpression <object> .MapFrom),
new Type[] { finalPropertyType },
Expression.Lambda(
propertyExpression,
sourceParameter
));
var forMemberMethod = Expression.Call(mapObjectExpression,
nameof(IMappingExpression.ForMember),
Type.EmptyTypes,
destinationMember,
Expression.Lambda(memberOptions, memberConfigTypeParameter));
Expression.Lambda(forMemberMethod).Compile().DynamicInvoke();
}
private static MethodCallExpression GetMapFromCall(ParameterExpression memberConfigTypeParameter, PropertyInfo targetPropertyInfo, PropertyMapInfo propMapInfo, ParameterExpression sourceTypeParameter)
{
var sourcePropertyInfos = propMapInfo.SourcePropertyInfos;
var targetPropertyName = targetPropertyInfo.Name;
Debug.WriteLine(
$"-- Mapping property {string.Join(".", sourcePropertyInfos.Select(s => s.Name))} to target type {targetPropertyName}");
var finalSourcePropertyType = sourcePropertyInfos.Last().PropertyType;
var propertyExpression =
sourcePropertyInfos.Aggregate <PropertyInfo, Expression>(null, (current, prop) => current == null
? Expression.Property(sourceTypeParameter, prop)
: Expression.Property(current, prop));
return(Expression.Call(memberConfigTypeParameter, nameof(IMemberConfigurationExpression.MapFrom),
new Type[] { finalSourcePropertyType },
Expression.Lambda(
propertyExpression,
sourceTypeParameter
)));
}
