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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 System.Collections.Generic;
using System.Globalization;
using Newtonsoft.Json.Utilities;
namespace Newtonsoft.Json.Serialization
{
internal readonly struct ResolverContractKey : IEquatable<ResolverContractKey>
{
private readonly Type _resolverType;
private readonly Type _contractType;
public ResolverContractKey(Type resolverType, Type contractType)
{
_resolverType = resolverType;
_contractType = contractType;
}
public override int GetHashCode()
{
return _resolverType.GetHashCode() ^ _contractType.GetHashCode();
}
public override bool Equals(object obj)
{
if (!(obj is ResolverContractKey))
{
return false;
}
return Equals((ResolverContractKey)obj);
}
public bool Equals(ResolverContractKey other)
{
return (_resolverType == other._resolverType && _contractType == other._contractType);
}
}
/// <summary>
/// Resolves member mappings for a type, camel casing property names.
/// </summary>
internal class CamelCasePropertyNamesContractResolver : DefaultContractResolver
{
private static readonly object TypeContractCacheLock = new object();
private static readonly PropertyNameTable NameTable = new PropertyNameTable();
private static Dictionary<ResolverContractKey, JsonContract> _contractCache;
/// <summary>
/// Initializes a new instance of the <see cref="CamelCasePropertyNamesContractResolver"/> class.
/// </summary>
public CamelCasePropertyNamesContractResolver()
{
NamingStrategy = new CamelCaseNamingStrategy
{
ProcessDictionaryKeys = true,
OverrideSpecifiedNames = true
};
}
/// <summary>
/// Resolves the contract for a given type.
/// </summary>
/// <param name="type">The type to resolve a contract for.</param>
/// <returns>The contract for a given type.</returns>
public override JsonContract ResolveContract(Type type)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
// for backwards compadibility the CamelCasePropertyNamesContractResolver shares contracts between instances
JsonContract contract;
ResolverContractKey key = new ResolverContractKey(GetType(), type);
Dictionary<ResolverContractKey, JsonContract> cache = _contractCache;
if (cache == null || !cache.TryGetValue(key, out contract))
{
contract = CreateContract(type);
// avoid the possibility of modifying the cache dictionary while another thread is accessing it
lock (TypeContractCacheLock)
{
cache = _contractCache;
Dictionary<ResolverContractKey, JsonContract> updatedCache = (cache != null)
? new Dictionary<ResolverContractKey, JsonContract>(cache)
: new Dictionary<ResolverContractKey, JsonContract>();
updatedCache[key] = contract;
_contractCache = updatedCache;
}
}
return contract;
}
internal override PropertyNameTable GetNameTable()
{
return NameTable;
}
}
}