public static LambdaExpression Create(TypePair pair)
{
var parameter = Expression.Parameter(pair.SrcType, pair.SrcType.Name.ToLowerInvariant());
var srcInfo = pair.SrcType.GetInfo();
var destInfo = pair.DestType.GetInfo();
var elementPair = new TypePair(srcInfo.ElementTypeInfo.Type, destInfo.ElementTypeInfo.Type);
if (MappingExtensions.HasLock(elementPair))
{
return(null);
}
var mapper = elementPair.GetMapper();
if (!mapper.CanMappable)
{
return(null);
}
var miSelect = typeof(Enumerable).FindMethod("Select", p =>
{
var expParam = p.GetParameters()[1];
return(expParam.ParameterType.GetGenericArguments().Length == 2);
}, srcInfo.ElementTypeInfo.Type, destInfo.ElementTypeInfo.Type);
Expression selectExpression = Expression.Call(miSelect, parameter, mapper.LambdaExpression);
return(Expression.Lambda(selectExpression, parameter));
}
public static LambdaExpression Create(TypePair pair)
{
var parameter = Expression.Parameter(pair.SrcType, pair.SrcType.Name.ToLowerInvariant());
var srcInfo = pair.SrcType.GetInfo();
var destInfo = pair.DestType.GetInfo();
var mappableSourceProperties = srcInfo.GetAllProperties();
var writableDestinationProperties = destInfo.GetAllProperties().Where(p => p.Raw.CanWrite);
List <MemberBinding> bindings = new List <MemberBinding>();
foreach (var destProp in writableDestinationProperties)
{
if (destProp.HasAttribute <NoMapAttribute>())
{
continue;
}
var mapPropName = destProp.GetAttribute <PropertyMapAttribute>()?.MappedPropertyName ?? destProp.Name;
if (!srcInfo.HasProperty(mapPropName))
{
continue;
}
var srcProp = srcInfo[mapPropName];
var propPair = new TypePair(srcProp.Type, destProp.Type);
if (MappingExtensions.HasLock(propPair))
{
continue;
}
var mapper = propPair.GetMapper();
if (mapper == null)
{
continue;
}
if (!mapper.CanMappable)
{
continue;
}
var srcPropExp = Expression.Property(parameter, srcProp.Raw);
var lambda = mapper.LambdaExpression.ReplaceParameter(mapper.LambdaExpression.Parameters[0], srcPropExp) as LambdaExpression;
var newBinding = Expression.Bind(destProp.Raw, lambda.Body);
bindings.Add(newBinding);
}
var newExp = Expression.New(destInfo.Type);
var memInitExp = Expression.MemberInit(newExp, bindings.ToArray());
return(Expression.Lambda(memInitExp, parameter));
}
