現在Android(Monodroid)やWp7で動作しているアプリをMonoTouchでIOSに移植したいという課題に直面しています。
それは問題ではありませんが、protobuf-net フレームワークを使用してデータを逆シリアル化すると、次の例外が発生して常に失敗します。
ProtoBuf.ProtoException: Invalid wire-type; this usually means you have over-written a file without truncating or setting the length; see http://stackoverflow.com/q/2152978/23354
at ProtoBuf.ProtoReader.StartSubItem (ProtoBuf.ProtoReader reader) [0x00000] in <filename unknown>:0
at ProtoBuf.BclHelpers.ReadGuid (ProtoBuf.ProtoReader source) [0x00000] in <filename unknown>:0
at TpSerializer.Read (Application.Mobile.TpDataAccess.TimeEntryLoggingDao.Entities.ActiveTimeEntryDbo , ProtoBuf.ProtoReader ) [0x00000] in <filename unknown>:0
at TpSerializer.Deserialize (Int32 , System.Object , ProtoBuf.ProtoReader ) [0x00000] in <filename unknown>:0
at ProtoBuf.Meta.TypeModel.TryDeserializeAuxiliaryType (ProtoBuf.ProtoReader reader, DataFormat format, Int32 tag, System.Type type, System.Object& value, Boolean skipOtherFields, Boolean asListItem, Boolean autoCreate, Boolean insideList) [0x00000] in <filename unknown>:0
at ProtoBuf.Meta.TypeModel.TryDeserializeList (ProtoBuf.Meta.TypeModel model, ProtoBuf.ProtoReader reader, DataFormat format, Int32 tag, System.Type listType, System.Type itemType, System.Object& value) [0x00000] in <filename unknown>:0
at ProtoBuf.Meta.TypeModel.TryDeserializeAuxiliaryType (ProtoBuf.ProtoReader reader, DataFormat format, Int32 tag, System.Type type, System.Object& value, Boolean skipOtherFields, Boolean asListItem, Boolean autoCreate, Boolean insideList) [0x00000] in <filename unknown>:0
at ProtoBuf.Meta.TypeModel.DeserializeCore (ProtoBuf.ProtoReader reader, System.Type type, System.Object value, Boolean noAutoCreate) [0x00000] in <filename unknown>:0
at ProtoBuf.Meta.TypeModel.Deserialize (System.IO.Stream source, System.Object value, System.Type type, ProtoBuf.SerializationContext context) [0x00000] in <filename unknown>:0
at ProtoBuf.Meta.TypeModel.Deserialize (System.IO.Stream source, System.Object value, System.Type type) [0x00000] in <filename unknown>:0
at Application.Mobile.TpDataAccess.Core.CoreProtobufDao`2[System.Guid,Application.Mobile.TpDataAccess.TimeEntryDao.Entities.TimeEntryDbo].EnsureCollection () [0x00000] in <filename unknown>:0
at Application.Mobile.TpDataAccess.TimeEntryDao.TimeEntryProtobufDao.PrepareAccess () [0x00000] in <filename unknown>:0
at Application.Mobile.TpBusinessComponents.TimeEntryService.TimeEntryService.PrepareAccess () [0x00000] in <filename unknown>:0
at App.TP.Mobile.AppDelegate.FinishedLaunching (MonoTouch.UIKit.UIApplication app, MonoTouch.Foundation.NSDictionary options) [0x00031] in /Users/Developer/Dropbox/Application Mobile/Application Mobile iOS Project/Application_Mobile/AppDelegate.cs:34
at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38
at App.TP.Mobile.Application.Main (System.String[] args) [0x00000] in /Users/Developer/Dropbox/Application Mobile/Application Mobile iOS Project/Application_Mobile/Main.cs:17
問題は、エンティティやデータの保存方法を変更していないことです。
// and serialize
string file = Path.Combine(StoragePath, dataFileName);
using (var stm = new FileStream(file, FileMode.Create))
{
foreach (var item in list)
Serializer.Serialize(stm, item);
}
どのエンティティを読み取っても、失敗します。
string file = Path.Combine(StoragePath, dataFileName);
if (!File.Exists(file))
return;
using (var stm = new FileStream(file, FileMode.Open))
{
var list = (TClass[]) Serializer.Deserialize(stm, null, typeof(TClass[]));
if (list == null)
return;
// transform array into dictionary
for (int i = 0; i < list.Length; i++)
{
var entity = list[i];
entities[primaryKeyFunction(entity)] = entity;
}
}
以下の Protobuf-NET 環境を使用しています。
- Protobuf-net r594 (unity dll)
- 事前に作成されたシリアライザ
データの保存は問題ありませんが、読み込みは失敗します。どんな助けでも大歓迎です。
ありがとう - ゲルハルト