internal MemberSettingContext(object owner, MemberPathSegment memberToken, Func <T> valueFactory, MemberGettingContext parent = null) : base(owner, memberToken, parent)
{
if (valueFactory == null)
{
throw new ArgumentNullException(nameof(valueFactory));
}
_valueFactory = valueFactory;
}
internal static void SetMemberValueCore <T>(object owner, MemberPathSegment member, Func <T> valueFactory, bool throwsOnError)
{
if (owner == null)
{
throw new ArgumentNullException(nameof(owner));
}
var type = owner is Type ? (Type)owner : owner.GetType();
var memberInfo = GetMemberInfo(type, member);
//如果没有找到指定的成员
if (memberInfo == null)
{
if (throwsOnError)
{
throw new ArgumentException(string.Format("The '{0}' member is not exists in the '{1}' type.", member, (owner is Type ? ((Type)owner).FullName : owner.GetType().FullName)));
}
return;
}
try
{
switch (memberInfo.MemberType)
{
case MemberTypes.Field:
((FieldInfo)memberInfo).SetValue(owner, valueFactory());
break;
case MemberTypes.Property:
((PropertyInfo)memberInfo).SetValue(owner, valueFactory());
break;
default:
if (throwsOnError)
{
throw new InvalidOperationException($"Dont support set value of '{member}' member in the '{type}' type.");
}
return;
}
}
catch
{
if (throwsOnError)
{
throw;
}
}
}
internal static MemberInfo GetMemberInfo(object owner, MemberPathSegment segment)
{
if (owner == null)
{
return(null);
}
var type = owner is Type ? (Type)owner : owner.GetType();
var members = type.FindMembers(MemberTypes.Field | MemberTypes.Property, BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static, (member, criteria) =>
{
MemberPathSegment memberSegment = (MemberPathSegment)criteria;
if (memberSegment.IsIndexer && member.MemberType == MemberTypes.Property)
{
var parameters = ((PropertyInfo)member).GetIndexParameters();
if (parameters.Length != memberSegment.Parameters.Length)
{
return(false);
}
for (int i = 0; i < parameters.Length; i++)
{
if (parameters[i].ParameterType != memberSegment.Parameters[i].GetType())
{
return(false);
}
}
return(true);
}
return(string.Equals(member.Name, memberSegment.Name, StringComparison.OrdinalIgnoreCase));
}, segment);
if (members != null && members.Length > 0)
{
return(members[0]);
}
return(null);
}
internal MemberGettingContext(object owner, MemberPathSegment memberSegment, MemberGettingContext parent = null)
{
_owner = owner ?? throw new ArgumentNullException(nameof(owner));
_parent = parent;
_memberSegment = memberSegment;
}
internal MemberSettingContext(object owner, MemberPathSegment memberToken, T value, MemberGettingContext parent = null) : base(owner, memberToken, parent)
{
_value = value;
_valueEvaluated = 1;
}
