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using System;
using System.Reflection;
using ProtoBuf.Meta;
namespace ProtoBuf.Serializers
{
internal sealed class PropertyDecorator : ProtoDecoratorBase
{
public override Type ExpectedType
{
get
{
return this.forType;
}
}
public override bool RequiresOldValue
{
get
{
return true;
}
}
public override bool ReturnsValue
{
get
{
return false;
}
}
private readonly PropertyInfo property;
private readonly Type forType;
private readonly bool readOptionsWriteValue;
private readonly MethodInfo shadowSetter;
public PropertyDecorator(TypeModel model, Type forType, PropertyInfo property, IProtoSerializer tail) : base(tail)
{
Helpers.DebugAssert(forType != null);
Helpers.DebugAssert(property != null);
this.forType = forType;
this.property = property;
PropertyDecorator.SanityCheck(model, property, tail, out this.readOptionsWriteValue, true, true);
this.shadowSetter = PropertyDecorator.GetShadowSetter(model, property);
}
private static void SanityCheck(TypeModel model, PropertyInfo property, IProtoSerializer tail, out bool writeValue, bool nonPublic, bool allowInternal)
{
bool flag = property == null;
if (flag)
{
throw new ArgumentNullException("property");
}
writeValue = (tail.ReturnsValue && (PropertyDecorator.GetShadowSetter(model, property) != null || (property.CanWrite && Helpers.GetSetMethod(property, nonPublic, allowInternal) != null)));
bool flag2 = !property.CanRead || Helpers.GetGetMethod(property, nonPublic, allowInternal) == null;
if (flag2)
{
throw new InvalidOperationException("Cannot serialize property without a get accessor");
}
bool flag3 = !writeValue && (!tail.RequiresOldValue || Helpers.IsValueType(tail.ExpectedType));
if (flag3)
{
throw new InvalidOperationException("Cannot apply changes to property " + property.DeclaringType.FullName + "." + property.Name);
}
}
private static MethodInfo GetShadowSetter(TypeModel model, PropertyInfo property)
{
Type reflectedType = property.ReflectedType;
ProtoDecoratorBase.s_propertyType[0] = property.PropertyType;
MethodInfo instanceMethod = Helpers.GetInstanceMethod(reflectedType, "Set" + property.Name, ProtoDecoratorBase.s_propertyType);
bool flag = instanceMethod == null || !instanceMethod.IsPublic || instanceMethod.ReturnType != model.MapType(typeof(void));
MethodInfo result;
if (flag)
{
result = null;
}
else
{
result = instanceMethod;
}
return result;
}
public override void Write(object value, ProtoWriter dest)
{
Helpers.DebugAssert(value != null);
value = this.property.GetValue(value, null);
bool flag = value != null;
if (flag)
{
this.Tail.Write(value, dest);
}
}
public override object Read(object value, ProtoReader source)
{
Helpers.DebugAssert(value != null);
object value2 = this.Tail.RequiresOldValue ? this.property.GetValue(value, null) : null;
object obj = this.Tail.Read(value2, source);
bool flag = this.readOptionsWriteValue && obj != null;
if (flag)
{
bool flag2 = this.shadowSetter == null;
if (flag2)
{
this.property.SetValue(value, obj, null);
}
else
{
ProtoDecoratorBase.s_argsRead[0] = obj;
this.shadowSetter.Invoke(value, ProtoDecoratorBase.s_argsRead);
}
}
return null;
}
internal static bool CanWrite(TypeModel model, MemberInfo member)
{
bool flag = member == null;
if (flag)
{
throw new ArgumentNullException("member");
}
PropertyInfo propertyInfo = member as PropertyInfo;
bool flag2 = propertyInfo != null;
bool result;
if (flag2)
{
result = (propertyInfo.CanWrite || PropertyDecorator.GetShadowSetter(model, propertyInfo) != null);
}
else
{
result = (member is FieldInfo);
}
return result;
}
}
}
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