ValueSerializer.cs :  » 2.6.4-mono-.net-core » System.Windows » System » Windows » Markup » C# / CSharp Open Source

// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
//
// Authors:
//  Chris Toshok (toshok@ximian.com)
//

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Converters;

namespace System.Windows.Markup{

  // I don't like the idea of hardcoding the types in here, but
  // I'm not sure what else to do about it..
  class DefaultValueSerializerContext : IValueSerializerContext
  {
    public ValueSerializer GetValueSerializerFor (PropertyDescriptor descriptor)
    {
      Attribute attribute = (Attribute)descriptor.Attributes[typeof (ValueSerializerAttribute)];
      if (attribute != null)
        return (ValueSerializer)Activator.CreateInstance (((ValueSerializerAttribute)attribute).ValueSerializerType);

      return GetValueSerializerFor (descriptor.PropertyType);
    }

    public ValueSerializer GetValueSerializerFor (Type type)
    {
      Attribute attribute = (Attribute)TypeDescriptor.GetAttributes (type)[typeof (ValueSerializerAttribute)];
      if (attribute != null)
        return (ValueSerializer)Activator.CreateInstance (((ValueSerializerAttribute)attribute).ValueSerializerType);

      if (typeof (DateTime).IsAssignableFrom (type))
        return new DateTimeValueSerializer();
      else if (typeof (Int32Rect).IsAssignableFrom (type))
        return new Int32RectValueSerializer ();
      else if (typeof (Point).IsAssignableFrom (type))
        return new PointValueSerializer ();
      else if (typeof (Rect).IsAssignableFrom (type))
        return new RectValueSerializer ();
      else if (typeof (Size).IsAssignableFrom (type))
        return new SizeValueSerializer ();
      else if (typeof (Vector).IsAssignableFrom (type))
        return new VectorValueSerializer ();
      else
        return null;
    }

    public void OnComponentChanged ()
    {
    }

    public bool OnComponentChanging ()
    {
      return false;
    }

    public IContainer Container {
      get { return null; }
    }

    public object Instance {
      get { return null; }
    }

    public PropertyDescriptor PropertyDescriptor {
      get { return null; }
    }

    public object GetService (Type serviceType)
    {
      return null;
    }
  }

  public abstract class ValueSerializer
  {
    protected ValueSerializer ()
    {
    }

    public virtual bool CanConvertFromString (string value, IValueSerializerContext context)
    {
      throw new NotImplementedException ();
    }

    public virtual bool CanConvertToString (object value, IValueSerializerContext context)
    {
      throw new NotImplementedException ();
    }

    public virtual object ConvertFromString (string value, IValueSerializerContext context)
    {
      throw new NotImplementedException ();
    }

    public virtual string ConvertToString (object value, IValueSerializerContext context)
    {
      throw new NotImplementedException ();
    }

    protected Exception GetConvertFromException (object value)
    {
      throw new NotImplementedException ();
    }

    protected Exception GetConvertToException (object value, Type destinationType)
    {
      throw new NotImplementedException ();
    }

    public virtual IEnumerable<Type> TypeReferences (object value, IValueSerializerContext context)
    {
      throw new NotImplementedException ();
    }

    public static ValueSerializer GetSerializerFor (PropertyDescriptor descriptor)
    {
      DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
      return defaultContext.GetValueSerializerFor (descriptor);
    }

    public static ValueSerializer GetSerializerFor (Type type)
    {
      DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
      return defaultContext.GetValueSerializerFor (type);
    }

    public static ValueSerializer GetSerializerFor (PropertyDescriptor descriptor, IValueSerializerContext context)
    {
      ValueSerializer s = context.GetValueSerializerFor (descriptor);
      if (s == null) {
        DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
        s = defaultContext.GetValueSerializerFor (descriptor);
      }
      return s;
    }

    public static ValueSerializer GetSerializerFor (Type type, IValueSerializerContext context)
    {
      ValueSerializer s = context.GetValueSerializerFor (type);
      if (s == null) {
        DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
        s = defaultContext.GetValueSerializerFor (type);
      }
      return s;
    }
  }

}