/// <summary>
/// Map member
/// </summary>
public Expression MapModelMember(MemberExpression memberExpression, Expression accessExpression, Type modelType = null)
{
ClassMap classMap = this.m_mapFile.GetModelClassMap(modelType ?? memberExpression.Expression.Type);
if (classMap == null)
{
return(accessExpression);
}
// Expression is the same class? Collapse if it is a key
MemberExpression accessExpressionAsMember = accessExpression as MemberExpression;
CollapseKey collapseKey = null;
PropertyMap propertyMap = null;
if (memberExpression.Member.Name == "Key" && classMap.TryGetCollapseKey(accessExpressionAsMember?.Member.Name, out collapseKey))
{
return(Expression.MakeMemberAccess(accessExpressionAsMember.Expression, accessExpressionAsMember.Expression.Type.GetRuntimeProperty(collapseKey.KeyName)));
}
else if (classMap.TryGetModelProperty(memberExpression.Member.Name, out propertyMap))
{
// We have to map through an associative table
if (propertyMap.Via != null)
{
Expression viaExpression = Expression.MakeMemberAccess(accessExpression, accessExpression.Type.GetRuntimeProperty(propertyMap.DomainName));
var via = propertyMap.Via;
while (via != null)
{
MemberInfo viaMember = viaExpression.Type.GetRuntimeProperty(via.DomainName);
if (viaMember == null)
{
break;
}
viaExpression = Expression.MakeMemberAccess(viaExpression, viaMember);
if (via.OrderBy != null && viaExpression.Type.FindInterfaces((o, _) => o == typeof(IEnumerable), null).Length > 0)
{
viaExpression = viaExpression.Sort(via.OrderBy, via.SortOrder);
}
if (via.Aggregate != AggregationFunctionType.None)
{
viaExpression = viaExpression.Aggregate(via.Aggregate);
}
via = via.Via;
}
return(viaExpression);
}
else
{
return(Expression.MakeMemberAccess(accessExpression, this.ExtractDomainType(accessExpression.Type).GetRuntimeProperty(propertyMap.DomainName)));
}
}
else
{
// look for idenical named property
Type domainType = this.MapModelType(modelType ?? memberExpression.Expression.Type);
// Get domain member and map
MemberInfo domainMember = accessExpression.Type.GetRuntimeProperty(memberExpression.Member.Name);
if (domainMember != null)
{
return(Expression.MakeMemberAccess(accessExpression, domainMember));
}
else
{
// Try on the base?
if (classMap.ParentDomainProperty != null)
{
domainMember = domainType.GetRuntimeProperty(classMap.ParentDomainProperty.DomainName);
return(MapModelMember(memberExpression, Expression.MakeMemberAccess(accessExpression, domainMember), (modelType ?? memberExpression.Expression.Type).BaseType));
}
else
{
//Debug.WriteLine(String.Format("Cannot find property information for {0}({1}).{2}", memberExpression.Expression, memberExpression.Expression.Type.Name, memberExpression.Member.Name));
return(null);
}
}
}
}
/// <summary>
/// Try to get a collapse key
/// </summary>
public bool TryGetCollapseKey(string propertyName, out CollapseKey retVal)
{
retVal = this.CollapseKey.Find(o => o.PropertyName == propertyName);
return(retVal != null);
}