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//
// JsonQueryStringConverter.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2008 Novell, Inc (http://www.novell.com)
//
// 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.
//
using System;
using System.Globalization;
using System.IO;
using System.Runtime.Serialization.Json;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Text;
using System.Xml;
namespace System.ServiceModel.Dispatcher
{
public class JsonQueryStringConverter : QueryStringConverter
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer (typeof (object));
internal string CustomWrapperName { get; set; }
public override bool CanConvert (Type type)
{
// almost copy from QueryStringConverter, except that DBNull and XmlQualifiedName are supported
switch (Type.GetTypeCode (type)) {
//case TypeCode.DBNull:
case TypeCode.Empty:
return false;
case TypeCode.Object:
if (type == typeof (TimeSpan))
return true;
if (type == typeof (DateTimeOffset))
return true;
if (type == typeof (Guid))
return true;
if (type == typeof (XmlQualifiedName))
return true;
if (type == typeof (object))
return true;
// if (type.GetCustomAttributes (typeof (TypeConverterAttribute), true).Length > 0)
// return true;
// FIXME: it should return false for things like List<OfPrivateType>.
return type.IsPublic || type.IsNestedPublic;
default:
return true;
}
}
public override object ConvertStringToValue (string parameter, Type parameterType)
{
if (parameterType == null)
throw new ArgumentNullException ("parameterType");
if (!CanConvert (parameterType))
throw new NotSupportedException (String.Format ("Conversion from the argument parameterType '{0}' is not supported", parameterType));
// In general .NET JSON parser is sloppy. It accepts
// such a string that is actually invalid in terms of
// the target type in JSON context.
switch (Type.GetTypeCode (parameterType)) {
case TypeCode.String:
// LAMESPEC LAMESPEC LAMESPEC: we cannot give "foo" as the string value input (even if they are escaped as %22!)
if (parameter == null)
return null;
if (parameter.Length > 1 && parameter [0] == '"' && parameter [parameter.Length - 1] == '"')
return parameter.Substring (1, parameter.Length - 2);
else if (parameter [0] != '"')
return parameter;
break;
#if !NET_2_1
case TypeCode.Char:
return parameter != null ? Char.Parse (parameter): default (char);
#endif
case TypeCode.SByte:
return parameter != null ? SByte.Parse (parameter, CultureInfo.InvariantCulture): default (sbyte);
case TypeCode.Byte:
return parameter != null ? Byte.Parse (parameter, CultureInfo.InvariantCulture): default (byte);
case TypeCode.Int16:
return parameter != null ? Int16.Parse (parameter, CultureInfo.InvariantCulture): default (short);
case TypeCode.Int32:
return parameter != null ? Int32.Parse (parameter, CultureInfo.InvariantCulture): default (int);
case TypeCode.Int64:
return parameter != null ? Int64.Parse (parameter, CultureInfo.InvariantCulture): default (long);
case TypeCode.UInt16:
return parameter != null ? UInt16.Parse (parameter, CultureInfo.InvariantCulture): default (ushort);
case TypeCode.UInt32:
return parameter != null ? UInt32.Parse (parameter, CultureInfo.InvariantCulture): default (uint);
case TypeCode.UInt64:
return parameter != null ? UInt64.Parse (parameter, CultureInfo.InvariantCulture): default (ulong);
case TypeCode.DateTime:
return parameter != null ? DateTime.Parse (parameter, CultureInfo.InvariantCulture): default (DateTime);
case TypeCode.Boolean:
return parameter != null ? Boolean.Parse (parameter): default (bool);
case TypeCode.Single:
return parameter != null ? Single.Parse (parameter, CultureInfo.InvariantCulture): default (float);
case TypeCode.Double:
return parameter != null ? Double.Parse (parameter, CultureInfo.InvariantCulture): default (double);
case TypeCode.Decimal:
return parameter != null ? Decimal.Parse (parameter, CultureInfo.InvariantCulture): default (decimal);
}
if (parameter == null)
return null;
DataContractJsonSerializer serializer =
new DataContractJsonSerializer (parameterType);
// hmm, it costs so silly though.
return serializer.ReadObject (new MemoryStream (Encoding.UTF8.GetBytes (parameter)));
}
bool IsKnownType (Type t)
{
switch (Type.GetTypeCode (t)) {
case TypeCode.Object:
if (t == typeof (Guid) ||
t == typeof (DBNull) ||
t == typeof (DateTimeOffset) ||
t == typeof (TimeSpan) ||
t == typeof (XmlQualifiedName))
return true;
return false;
default:
return true;
}
}
public override string ConvertValueToString (object parameter, Type parameterType)
{
if (parameterType == null)
throw new ArgumentNullException ("parameterType");
if (!CanConvert (parameterType))
throw new NotSupportedException (String.Format ("Conversion from the argument parameterType '{0}' is not supported", parameterType));
if (parameter == null)
return null;
if (parameter is DBNull)
return "{}";
parameterType = ToActualType (parameterType);
if (parameter is IConvertible)
parameter = ((IConvertible) parameter).ToType (parameterType, CultureInfo.InvariantCulture);
switch (Type.GetTypeCode (parameterType)) {
case TypeCode.String:
string s = parameter is IFormattable ?
((IFormattable) parameter).ToString (null, CultureInfo.InvariantCulture) :
parameter.ToString ();
StringBuilder sb = new StringBuilder (s);
sb.Replace ("\"", "\\\"");
sb.Insert (0, "\"");
sb.Append ('\"');
return sb.ToString ();
default:
if (parameterType == typeof (XmlQualifiedName)) {
var qname = (XmlQualifiedName) parameter;
return String.Concat ("\"", qname.Name, ":", qname.Namespace, "\"");
}
return parameter.ToString ();
}
}
Type ToActualType (Type t)
{
switch (Type.GetTypeCode (t)) {
case TypeCode.DBNull: // though DBNull.Value input is converted to "{}". This result is used for String input.
case TypeCode.Char:
case TypeCode.String:
return typeof (string);
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
// return typeof (long);
return typeof (decimal);
case TypeCode.Byte:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
// return typeof (ulong);
return typeof (decimal);
case TypeCode.DateTime:
case TypeCode.Boolean:
return t;
case TypeCode.Single:
case TypeCode.Double:
// return typeof (double);
return typeof (decimal);
case TypeCode.Decimal:
return typeof (decimal);
default:
return t;
}
}
}
}
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