Newtonsoft.Json\Linq\ComponentModel\JTypeDescriptor.cs

#region License

// Copyright (c) 2007 James Newton-King

//

// 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.

#endregion

#if !SILVERLIGHT

using System;

using System.Collections.Generic;

using System.ComponentModel;

using Newtonsoft.Json.Utilities;

namespace Newtonsoft.Json.Linq.ComponentModel

{

  /// <summary>

  /// Represents a view of a <see cref="JObject"/>.

  /// </summary>

  public class JTypeDescriptor : ICustomTypeDescriptor

  {

    private readonly JObject _value;

    /// <summary>

    /// Initializes a new instance of the <see cref="JTypeDescriptor"/> class.

    /// </summary>

    /// <param name="value">The value.</param>

    public JTypeDescriptor(JObject value)

    {

      ValidationUtils.ArgumentNotNull(value, "value");

      _value = value;

    }

    /// <summary>

    /// Returns the properties for this instance of a component.

    /// </summary>

    /// <returns>

    /// A <see cref="T:System.ComponentModel.PropertyDescriptorCollection"/> that represents the properties for this component instance.

    /// </returns>

    public virtual PropertyDescriptorCollection GetProperties()

    {

      return GetProperties(null);

    }

    private static Type GetTokenPropertyType(JToken token)

    {

      if (token is JValue)

      {

        JValue v = (JValue) token;

        return (v.Value != null) ? v.Value.GetType() : typeof (object);

      }

      return token.GetType();

    }

    /// <summary>

    /// Returns the properties for this instance of a component using the attribute array as a filter.

    /// </summary>

    /// <param name="attributes">An array of type <see cref="T:System.Attribute"/> that is used as a filter.</param>

    /// <returns>

    /// A <see cref="T:System.ComponentModel.PropertyDescriptorCollection"/> that represents the filtered properties for this component instance.

    /// </returns>

    public virtual PropertyDescriptorCollection GetProperties(Attribute[] attributes)

    {

      PropertyDescriptorCollection descriptors = new PropertyDescriptorCollection(null);

      if (_value != null)

      {

        foreach (KeyValuePair<string, JToken> propertyValue in _value)

        {

          descriptors.Add(new JPropertyDescriptor(propertyValue.Key, GetTokenPropertyType(propertyValue.Value)));

        }

      }

      return descriptors;

    }

    /// <summary>

    /// Returns a collection of custom attributes for this instance of a component.

    /// </summary>

    /// <returns>

    /// An <see cref="T:System.ComponentModel.AttributeCollection"/> containing the attributes for this object.

    /// </returns>

    public AttributeCollection GetAttributes()

    {

      return AttributeCollection.Empty;

    }

    /// <summary>

    /// Returns the class name of this instance of a component.

    /// </summary>

    /// <returns>

    /// The class name of the object, or null if the class does not have a name.

    /// </returns>

    public string GetClassName()

    {

      return null;

    }

    /// <summary>

    /// Returns the name of this instance of a component.

    /// </summary>

    /// <returns>

    /// The name of the object, or null if the object does not have a name.

    /// </returns>

    public string GetComponentName()

    {

      return null;

    }

    /// <summary>

    /// Returns a type converter for this instance of a component.

    /// </summary>

    /// <returns>

    /// A <see cref="T:System.ComponentModel.TypeConverter"/> that is the converter for this object, or null if there is no <see cref="T:System.ComponentModel.TypeConverter"/> for this object.

    /// </returns>

    public TypeConverter GetConverter()

    {

      return new TypeConverter();

    }

    /// <summary>

    /// Returns the default event for this instance of a component.

    /// </summary>

    /// <returns>

    /// An <see cref="T:System.ComponentModel.EventDescriptor"/> that represents the default event for this object, or null if this object does not have events.

    /// </returns>

    public EventDescriptor GetDefaultEvent()

    {

      return null;

    }

    /// <summary>

    /// Returns the default property for this instance of a component.

    /// </summary>

    /// <returns>

    /// A <see cref="T:System.ComponentModel.PropertyDescriptor"/> that represents the default property for this object, or null if this object does not have properties.

    /// </returns>

    public PropertyDescriptor GetDefaultProperty()

    {

      return null;

    }

    /// <summary>

    /// Returns an editor of the specified type for this instance of a component.

    /// </summary>

    /// <param name="editorBaseType">A <see cref="T:System.Type"/> that represents the editor for this object.</param>

    /// <returns>

    /// An <see cref="T:System.Object"/> of the specified type that is the editor for this object, or null if the editor cannot be found.

    /// </returns>

    public object GetEditor(Type editorBaseType)

    {

      return null;

    }

    /// <summary>

    /// Returns the events for this instance of a component using the specified attribute array as a filter.

    /// </summary>

    /// <param name="attributes">An array of type <see cref="T:System.Attribute"/> that is used as a filter.</param>

    /// <returns>

    /// An <see cref="T:System.ComponentModel.EventDescriptorCollection"/> that represents the filtered events for this component instance.

    /// </returns>

    public EventDescriptorCollection GetEvents(Attribute[] attributes)

    {

      return EventDescriptorCollection.Empty;

    }

    /// <summary>

    /// Returns the events for this instance of a component.

    /// </summary>

    /// <returns>

    /// An <see cref="T:System.ComponentModel.EventDescriptorCollection"/> that represents the events for this component instance.

    /// </returns>

    public EventDescriptorCollection GetEvents()

    {

      return EventDescriptorCollection.Empty;

    }

    /// <summary>

    /// Returns an object that contains the property described by the specified property descriptor.

    /// </summary>

    /// <param name="pd">A <see cref="T:System.ComponentModel.PropertyDescriptor"/> that represents the property whose owner is to be found.</param>

    /// <returns>

    /// An <see cref="T:System.Object"/> that represents the owner of the specified property.

    /// </returns>

    public object GetPropertyOwner(PropertyDescriptor pd)

    {

      return null;

    }

  }

}

#endif