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using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using ProtoBuf.Meta;
namespace ProtoBuf.Serializers
{
internal sealed class ImmutableCollectionDecorator : ListDecorator
{
protected override bool RequireAdd
{
get
{
return false;
}
}
private readonly MethodInfo builderFactory;
private readonly MethodInfo add;
private readonly MethodInfo addRange;
private readonly MethodInfo finish;
private static Type ResolveIReadOnlyCollection(Type declaredType, Type t)
{
foreach (Type type in declaredType.GetInterfaces())
{
bool flag = type.IsGenericType && type.Name.StartsWith("IReadOnlyCollection`");
if (flag)
{
bool flag2 = t != null;
if (flag2)
{
Type[] genericArguments = type.GetGenericArguments();
bool flag3 = genericArguments.Length != 1 && genericArguments[0] != t;
if (flag3)
{
goto IL_68;
}
}
return type;
}
IL_68:;
}
return null;
}
internal static bool IdentifyImmutable(TypeModel model, Type declaredType, out MethodInfo builderFactory, out MethodInfo add, out MethodInfo addRange, out MethodInfo finish)
{
MethodInfo methodInfo;
finish = (methodInfo = null);
addRange = (methodInfo = methodInfo);
add = (methodInfo = methodInfo);
builderFactory = methodInfo;
bool flag = model == null || declaredType == null;
bool result;
if (flag)
{
result = false;
}
else
{
bool flag2 = !declaredType.IsGenericType;
if (flag2)
{
result = false;
}
else
{
Type[] genericArguments = declaredType.GetGenericArguments();
int num = genericArguments.Length;
Type[] array;
if (num != 1)
{
if (num != 2)
{
return false;
}
Type type = model.MapType(typeof(KeyValuePair<, >));
bool flag3 = type == null;
if (flag3)
{
return false;
}
type = type.MakeGenericType(genericArguments);
array = new Type[]
{
type
};
}
else
{
array = genericArguments;
}
bool flag4 = ImmutableCollectionDecorator.ResolveIReadOnlyCollection(declaredType, null) == null;
if (flag4)
{
result = false;
}
else
{
string text = declaredType.Name;
int num2 = text.IndexOf('`');
bool flag5 = num2 <= 0;
if (flag5)
{
result = false;
}
else
{
text = (declaredType.IsInterface ? text.Substring(1, num2 - 1) : text.Substring(0, num2));
Type type2 = model.GetType(declaredType.Namespace + "." + text, declaredType.Assembly);
bool flag6 = type2 == null && text == "ImmutableSet";
if (flag6)
{
type2 = model.GetType(declaredType.Namespace + ".ImmutableHashSet", declaredType.Assembly);
}
bool flag7 = type2 == null;
if (flag7)
{
result = false;
}
else
{
foreach (MethodInfo methodInfo2 in type2.GetMethods())
{
bool flag8 = !methodInfo2.IsStatic || methodInfo2.Name != "CreateBuilder" || !methodInfo2.IsGenericMethodDefinition || methodInfo2.GetParameters().Length != 0 || methodInfo2.GetGenericArguments().Length != genericArguments.Length;
if (!flag8)
{
builderFactory = methodInfo2.MakeGenericMethod(genericArguments);
break;
}
}
Type type3 = model.MapType(typeof(void));
bool flag9 = builderFactory == null || builderFactory.ReturnType == null || builderFactory.ReturnType == type3;
if (flag9)
{
result = false;
}
else
{
add = Helpers.GetInstanceMethod(builderFactory.ReturnType, "Add", array);
bool flag10 = add == null;
if (flag10)
{
result = false;
}
else
{
finish = Helpers.GetInstanceMethod(builderFactory.ReturnType, "ToImmutable", Helpers.EmptyTypes);
bool flag11 = finish == null || finish.ReturnType == null || finish.ReturnType == type3;
if (flag11)
{
result = false;
}
else
{
bool flag12 = finish.ReturnType != declaredType && !Helpers.IsAssignableFrom(declaredType, finish.ReturnType);
if (flag12)
{
result = false;
}
else
{
addRange = Helpers.GetInstanceMethod(builderFactory.ReturnType, "AddRange", new Type[]
{
declaredType
});
bool flag13 = addRange == null;
if (flag13)
{
Type type4 = model.MapType(typeof(IEnumerable<>), false);
bool flag14 = type4 != null;
if (flag14)
{
addRange = Helpers.GetInstanceMethod(builderFactory.ReturnType, "AddRange", new Type[]
{
type4.MakeGenericType(array)
});
}
}
result = true;
}
}
}
}
}
}
}
}
}
return result;
}
internal ImmutableCollectionDecorator(TypeModel model, Type declaredType, Type concreteType, IProtoSerializer tail, int fieldNumber, bool writePacked, WireType packedWireType, bool returnList, bool overwriteList, bool supportNull, MethodInfo builderFactory, MethodInfo add, MethodInfo addRange, MethodInfo finish) : base(model, declaredType, concreteType, tail, fieldNumber, writePacked, packedWireType, returnList, overwriteList, supportNull)
{
this.builderFactory = builderFactory;
this.add = add;
this.addRange = addRange;
this.finish = finish;
}
public override object Read(object value, ProtoReader source)
{
object obj = this.builderFactory.Invoke(null, null);
int fieldNumber = source.FieldNumber;
object[] s_argsRead = ProtoDecoratorBase.s_argsRead;
bool flag = base.AppendToCollection && value != null && ((IList)value).Count != 0;
if (flag)
{
bool flag2 = this.addRange != null;
if (flag2)
{
s_argsRead[0] = value;
this.addRange.Invoke(obj, s_argsRead);
}
else
{
foreach (object obj2 in ((IList)value))
{
s_argsRead[0] = obj2;
this.add.Invoke(obj, s_argsRead);
}
}
}
bool flag3 = this.packedWireType != WireType.None && source.WireType == WireType.String;
if (flag3)
{
SubItemToken token = ProtoReader.StartSubItem(source);
while (ProtoReader.HasSubValue(this.packedWireType, source))
{
s_argsRead[0] = this.Tail.Read(null, source);
this.add.Invoke(obj, s_argsRead);
}
ProtoReader.EndSubItem(token, source);
}
else
{
do
{
s_argsRead[0] = this.Tail.Read(null, source);
this.add.Invoke(obj, s_argsRead);
}
while (source.TryReadFieldHeader(fieldNumber));
}
return this.finish.Invoke(obj, null);
}
}
}
|
