コード例 #1
0
ファイル: Collection.cs プロジェクト: zyltntking/Lenneth
        /// <summary>
        /// Rename a collection
        /// </summary>
        public bool RenameCollection(string collection, string newName)
        {
            if (collection.IsNullOrWhiteSpace())
            {
                throw new ArgumentNullException(nameof(collection));
            }
            if (newName.IsNullOrWhiteSpace())
            {
                throw new ArgumentNullException(nameof(newName));
            }

            return(Transaction <bool>(collection, false, (col) =>
            {
                if (col == null)
                {
                    return false;
                }

                _log.Write(Logger.Command, "rename collection '{0}' -> '{1}'", collection, newName);

                // check if newName already exists
                if (GetCollectionNames().Contains(newName, StringComparer.OrdinalIgnoreCase))
                {
                    throw LiteException.AlreadyExistsCollectionName(newName);
                }

                // change collection name and save
                col.CollectionName = newName;

                // set collection page as dirty
                _pager.SetDirty(col);

                // update header collection reference
                var header = _pager.GetPage <HeaderPage>(0);

                header.CollectionPages.Remove(collection);
                header.CollectionPages.Add(newName, col.PageID);

                _pager.SetDirty(header);

                return true;
            }));
        }