/// <summary>
/// Called when <see cref="M:LoadDataAsync"/> is executed to load an object from persistent storage.
/// </summary>
/// <typeparam name="T">The type of the stored value.</typeparam>
/// <param name="path">The string that identifies where the object is stored.</param>
/// <param name="serializer">The implementation of <see cref="Wygwam.Windows.Storage.IDataSerializer"/> that will be used to deserialize the specified object.</param>
/// <param name="storageType">Defines the desired storage type. Not all implementations support all storage types.</param>
/// <returns>
/// <c>true</c> if the object was successfully retrieved.
/// </returns>
protected override async Task <T> OnLoadDataAsync <T>(string path, Wygwam.Windows.Storage.IDataSerializer serializer, Storage.StorageType storageType)
{
try
{
var file = await(await GetDataFolder(storageType, path)).GetFileAsync(Path.GetFileName(path));
using (var inStream = await file.OpenSequentialReadAsync())
{
return(serializer.Deserialize <T>(inStream.AsStreamForRead()));
}
}
catch
{
return(default(T));
}
}
/// <summary>
/// Called when <see cref="M:SaveDataAsync" /> is executed to store an object in persistent storage.
/// </summary>
/// <param name="path">The string that identifies where the object will be stored.</param>
/// <param name="data">The object that will be serialized and stored.</param>
/// <param name="serializer">The implementation of <see cref="Wygwam.Windows.Storage.IDataSerializer" /> that will be used to serialize the specified object.</param>
/// <param name="storageType">Defines the desired storage type. Not all implementations support all storage types.</param>
/// <returns>
/// <c>true</c> if the object was successfully persisted.
/// </returns>
protected override async Task <bool> OnSaveDataAsync(string path, object data, Wygwam.Windows.Storage.IDataSerializer serializer, Storage.StorageType storageType)
{
try
{
var file = await(await GetDataFolder(storageType, path)).CreateFileAsync(Path.GetFileName(path), _defaultCollisionPolicy);
using (var fileStream = await file.OpenStreamForWriteAsync())
{
serializer.Serialize(fileStream, data);
await fileStream.FlushAsync();
}
return(true);
}
catch
{
}
return(false);
}