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#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
using System;
using Newtonsoft.Json.Utilities;
using System.Globalization;
namespace Newtonsoft.Json.Serialization
{
internal class DefaultReferenceResolver : IReferenceResolver
{
private int _referenceCount;
private BidirectionalDictionary<string, object> GetMappings(object context)
{
JsonSerializerInternalBase internalSerializer;
if (context is JsonSerializerInternalBase)
internalSerializer = (JsonSerializerInternalBase) context;
else if (context is JsonSerializerProxy)
internalSerializer = ((JsonSerializerProxy) context).GetInternalSerializer();
else
throw new Exception("The DefaultReferenceResolver can only be used internally.");
return internalSerializer.DefaultReferenceMappings;
}
public object ResolveReference(object context, string reference)
{
object value;
GetMappings(context).TryGetByFirst(reference, out value);
return value;
}
public string GetReference(object context, object value)
{
var mappings = GetMappings(context);
string reference;
if (!mappings.TryGetBySecond(value, out reference))
{
_referenceCount++;
reference = _referenceCount.ToString(CultureInfo.InvariantCulture);
mappings.Add(reference, value);
}
return reference;
}
public void AddReference(object context, string reference, object value)
{
GetMappings(context).Add(reference, value);
}
public bool IsReferenced(object context, object value)
{
string reference;
return GetMappings(context).TryGetBySecond(value, out reference);
}
}
}
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