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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.Linq;
using System.Reflection;
using Newtonsoft.Json.Utilities;
using System.Collections;
namespace Newtonsoft.Json.Serialization
{
/// <summary>
/// Contract details for a <see cref="Type"/> used by the <see cref="JsonSerializer"/>.
/// </summary>
public class JsonArrayContract : JsonContract
{
/// <summary>
/// Gets the <see cref="Type"/> of the collection items.
/// </summary>
/// <value>The <see cref="Type"/> of the collection items.</value>
public Type CollectionItemType { get; private set; }
internal JsonContract CollectionItemContract { get; set; }
private readonly bool _isCollectionItemTypeNullableType;
private readonly Type _genericCollectionDefinitionType;
private Type _genericWrapperType;
private MethodCall<object, object> _genericWrapperCreator;
/// <summary>
/// Initializes a new instance of the <see cref="JsonArrayContract"/> class.
/// </summary>
/// <param name="underlyingType">The underlying type for the contract.</param>
public JsonArrayContract(Type underlyingType)
: base(underlyingType)
{
ContractType = JsonContractType.Array;
if (ReflectionUtils.ImplementsGenericDefinition(underlyingType, typeof(ICollection<>), out _genericCollectionDefinitionType))
{
CollectionItemType = _genericCollectionDefinitionType.GetGenericArguments()[0];
}
else if (underlyingType.IsGenericType() && underlyingType.GetGenericTypeDefinition() == typeof(IEnumerable<>))
{
_genericCollectionDefinitionType = typeof (IEnumerable<>);
CollectionItemType = underlyingType.GetGenericArguments()[0];
}
else
{
CollectionItemType = ReflectionUtils.GetCollectionItemType(UnderlyingType);
}
if (CollectionItemType != null)
_isCollectionItemTypeNullableType = ReflectionUtils.IsNullableType(CollectionItemType);
if (IsTypeGenericCollectionInterface(UnderlyingType))
{
CreatedType = ReflectionUtils.MakeGenericType(typeof(List<>), CollectionItemType);
}
}
internal IWrappedCollection CreateWrapper(object list)
{
if ((list is IList && (CollectionItemType == null || !_isCollectionItemTypeNullableType))
|| UnderlyingType.IsArray)
return new CollectionWrapper<object>((IList)list);
if (_genericCollectionDefinitionType != null)
{
EnsureGenericWrapperCreator();
return (IWrappedCollection) _genericWrapperCreator(null, list);
}
else
{
IList values = ((IEnumerable) list).Cast<object>().ToList();
if (CollectionItemType != null)
{
Array array = Array.CreateInstance(CollectionItemType, values.Count);
for (int i = 0; i < values.Count; i++)
{
array.SetValue(values[i], i);
}
values = array;
}
return new CollectionWrapper<object>(values);
}
}
private void EnsureGenericWrapperCreator()
{
if (_genericWrapperCreator == null)
{
_genericWrapperType = ReflectionUtils.MakeGenericType(typeof (CollectionWrapper<>), CollectionItemType);
Type constructorArgument;
if (ReflectionUtils.InheritsGenericDefinition(_genericCollectionDefinitionType, typeof(List<>))
|| _genericCollectionDefinitionType.GetGenericTypeDefinition() == typeof(IEnumerable<>))
constructorArgument = ReflectionUtils.MakeGenericType(typeof(ICollection<>), CollectionItemType);
else
constructorArgument = _genericCollectionDefinitionType;
ConstructorInfo genericWrapperConstructor = _genericWrapperType.GetConstructor(new[] { constructorArgument });
_genericWrapperCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateMethodCall<object>(genericWrapperConstructor);
}
}
private bool IsTypeGenericCollectionInterface(Type type)
{
if (!type.IsGenericType())
return false;
Type genericDefinition = type.GetGenericTypeDefinition();
return (genericDefinition == typeof(IList<>)
|| genericDefinition == typeof(ICollection<>)
|| genericDefinition == typeof(IEnumerable<>));
}
}
}
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