public static T TryGet <T>(this DB db, ReadOptions options, DataEntryPrefix prefix, ISerializable key) where T : class, ISerializable, new()
{
Slice slice;
if (!db.TryGet(options, SliceBuilder.Begin(prefix).Add(key), out slice))
{
return(null);
}
return(slice.ToArray().AsSerializable <T>());
}
public static T TryGet <T>(this DB db, ReadOptions options, DataEntryPrefix prefix, ISerializable key, Func <Slice, T> resultSelector) where T : class
{
Slice slice;
if (!db.TryGet(options, SliceBuilder.Begin(prefix).Add(key), out slice))
{
return(null);
}
return(resultSelector(slice));
}
public static SliceBuilder Begin(DataEntryPrefix prefix)
{
return(new SliceBuilder().Add((byte)prefix));
}
public static void Delete(this WriteBatch batch, DataEntryPrefix prefix, ISerializable key)
{
batch.Delete(SliceBuilder.Begin(prefix).Add(key));
}
public static void Put(this WriteBatch batch, DataEntryPrefix prefix, ISerializable key, ISerializable value)
{
batch.Put(SliceBuilder.Begin(prefix).Add(key), value.ToArray());
}
public static T Get <T>(this DB db, ReadOptions options, DataEntryPrefix prefix, ISerializable key, Func <Slice, T> resultSelector)
{
return(resultSelector(db.Get(options, SliceBuilder.Begin(prefix).Add(key))));
}
public static T Get <T>(this DB db, ReadOptions options, DataEntryPrefix prefix, ISerializable key) where T : class, ISerializable, new()
{
return(db.Get(options, SliceBuilder.Begin(prefix).Add(key)).ToArray().AsSerializable <T>());
}
public static IEnumerable <T> Find <T>(this DB db, ReadOptions options, DataEntryPrefix prefix) where T : class, ISerializable, new()
{
return(Find(db, options, SliceBuilder.Begin(prefix), (k, v) => v.ToArray().AsSerializable <T>()));
}
public DbCache(DB db, DataEntryPrefix prefix)
{
this.db = db;
this.prefix = prefix;
}