private Infrastructure.OeShadowPropertyInfo CreateShadowProperty(IPropertyBase efProperty)
{
if (!_shadowProperties.TryGetValue(efProperty, out Infrastructure.OeShadowPropertyInfo shadowProperty))
{
shadowProperty = new Infrastructure.OeShadowPropertyInfo(efProperty.DeclaringType.ClrType, efProperty.ClrType, efProperty.Name);
_shadowProperties.Add(efProperty, shadowProperty);
}
return(shadowProperty);
}
protected override Expression VisitMember(MemberExpression node)
{
Expression expression = base.Visit(node.Expression);
PropertyInfo property = node.Member as PropertyInfo;
if (property != null && expression.Type == node.Expression.Type)
{
if (property.PropertyType == typeof(DateTimeOffset))
{
if (property.DeclaringType == typeof(DateTimeOffset?) && property.Name == nameof(Nullable <DateTimeOffset> .Value))
{
return(Expression.MakeMemberAccess(expression, expression.Type.GetMember(node.Member.Name).Single()));
}
var propertyInfo = new Infrastructure.OeShadowPropertyInfo(property.DeclaringType, typeof(DateTime), property.Name);
return(Expression.Property(expression, propertyInfo));
}
if (property.PropertyType == typeof(DateTimeOffset?))
{
var propertyInfo = new Infrastructure.OeShadowPropertyInfo(property.DeclaringType, typeof(DateTime?), property.Name);
return(Expression.Property(expression, propertyInfo));
}
}
if (expression != node.Expression)
{
if (IsAnonymousType(node.Expression.Type))
{
node = MapPropertyAnonymousTypeToTuple(expression, (PropertyInfo)node.Member);
}
else
{
node = Expression.MakeMemberAccess(expression, expression.Type.GetMember(node.Member.Name).Single());
}
}
if (property != null && property.PropertyType == typeof(Decimal))
{
return(Expression.Convert(node, typeof(double)));
}
if (property != null && property.PropertyType == typeof(Decimal?))
{
return(Expression.Convert(node, typeof(double?)));
}
return(node);
MemberExpression MapPropertyAnonymousTypeToTuple(Expression tupleInstance, PropertyInfo anonymousProperty)
{
Type tupleType = expression.Type;
PropertyInfo[] anonymousProperties = anonymousProperty.DeclaringType.GetProperties();
int index = Array.IndexOf(anonymousProperties, anonymousProperty);
MemberExpression memberAccess = null;
while (OeExpressionHelper.IsTupleType(tupleType))
{
int offset = index > 7 ? 7 : index;
PropertyInfo tupleProperty = tupleType.GetProperties()[offset];
if (memberAccess == null)
{
memberAccess = Expression.Property(tupleInstance, tupleProperty);
}
else
{
memberAccess = Expression.Property(memberAccess, tupleProperty);
}
tupleType = tupleProperty.PropertyType;
index -= offset;
}
return(memberAccess);
}
}
