[Mono-bugs] [Bug 640402] New: XmlSerialization and GetConstructor not working on generic types

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=640402

https://bugzilla.novell.com/show_bug.cgi?id=640402#c0


           Summary: XmlSerialization and GetConstructor not working on
                    generic types
    Classification: Mono
           Product: MonoTouch
           Version: unspecified
          Platform: Macintosh
        OS/Version: Mac OS X 10.6
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Runtime
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: johan.otto at justenough.com
         QAContact: mono-bugs at lists.ximian.com
                CC: johan.otto at justenough.com
          Found By: Customer
           Blocker: Yes


Description of Problem:


Steps to reproduce the problem:
1. Create a class that inherits from a generic class that has a
[Preserve(AllMembers=true)]. In my case I have the following (simplified):

[Preserve(AllMembers=true)]
public class BusinessObject
{
}

[XmlType]
public partial class Customer : BusinessObject
{
  [XmlAttribute]
  public string Name {get; set;}
}

[Preserve(AllMembers=true)]
public class BusinessObjects<T> : Collection<T> where T: BusinessObject
{
  public BusinessObjects()
  {
  }
  public BusinessObjects(BusinessObject owner):this()
  {
  }
}

[XmlRoot("Customers")]
    public partial class Customers : BusinessObjects<Customer>
    {
            public Customers(Organization owner):base(owner) // Can remove for
testing pruposes
            {
            }
          public Customers():base()
          {
          }

       }



2. Now try and use the the XmlSerializer to serialize the class. 
3. Also try and call this extension method I wrote... always returns false.

public static bool HasDefaultConstructor(this Type type)
        {

            if (type.IsPrimitive)
            {
                return true;
            }

            if (type.GetConstructor(
                BindingFlags.Public
                | BindingFlags.Instance
                | BindingFlags.CreateInstance, null, new Type[0], null) !=
null)
            {
                return true;
            }

            return false;
        }

----- Test Xml
<Customers>
  <Customer Name="Zim" />
  <Customer Name="Zum" />
</Customers>

Actual Results:
  The constructor does not get preserved when using reflection even though
[Preserve(AllMembers=true)] on the base class.

The XmlSerializer failes with a SIGNEV

Expected Results:


How often does this happen? 
if the class is not used directly in the code path from Main()... everytime

Additional Information:

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