Databases
StackOverflow2013
Postsdbo
POusing MsgPack with Servicestack: how do I do KnownType?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POusing MsgPack with Servicestack: how do I do KnownType?
    primarykey
    data
    text
    <p>I'm attempting to support the MessagePack protocol in my current Servicestack implementation. I need it to support (de)serializing a list of ISegment defined like this:</p> <pre><code>[KnownType(typeof(ArcSegment)), KnownType(typeof(LineSegment))] public class PathRequest { public List&lt;ISegment&gt; Segments {get;set;} } public interface ISegment { Point StartPoint {get;set;} Point EndPoint {get;set;} } public class ArcSegment: ISegment {...} public class LineSegment: ISegment {...} </code></pre> <p>Out of the box it told me that </p> <p>Type 'Asi.Geometry.ISegment' does not have both of default (parameterless) public constructor and public constructor with an Int32 parameter.</p> <p>That's very true. Apparently it does not use the KnownType attribute. After reading around online I discovered that I can make my own serializer. Hence I tried this:</p> <pre><code>class ArcLineSerializer: MessagePackSerializer&lt;ISegment&gt; { private readonly MessagePackSerializer&lt;ArcSegment&gt; _arcSerializer = MessagePackSerializer.Create&lt;ArcSegment&gt;(); private readonly MessagePackSerializer&lt;LineSegment&gt; _lineSerializer = MessagePackSerializer.Create&lt;LineSegment&gt;(); protected override void PackToCore(Packer packer, ISegment objectTree) { if(objectTree is ArcSegment) _arcSerializer.PackTo(packer, (ArcSegment)objectTree); else if (objectTree is LineSegment) _lineSerializer.PackTo(packer, (LineSegment)objectTree); else throw new NotSupportedException(); } protected override ISegment UnpackFromCore(Unpacker unpacker) { var data = unpacker.Data; if (data != null) { if (data.Value.IsTypeOf&lt;ArcSegment&gt;().GetValueOrDefault()) return _arcSerializer.UnpackFrom(unpacker); if (data.Value.IsTypeOf&lt;LineSegment&gt;().GetValueOrDefault()) return _lineSerializer.UnpackFrom(unpacker); throw new NotSupportedException(); } return null; } } </code></pre> <p>Alas, that gives me the same error trying to construct the _arcSerializer. How's it done?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USBrannon
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POusing MsgPack with Servicestack: how do I do KnownType?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POusing MsgPack with Servicestack: how do I do KnownType?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POusing MsgPack with Servicestack: how do I do KnownType?
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload