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80 lines
2.4 KiB
C#
80 lines
2.4 KiB
C#
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using osu.Framework.Logging;
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using osu.Framework.Platform;
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using SQLite.Net;
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using SQLiteNetExtensions.Extensions;
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namespace osu.Game.Database
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{
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public abstract class Database
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{
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protected SQLiteConnection Connection { get; }
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protected Storage Storage { get; }
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protected Database(Storage storage, SQLiteConnection connection)
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{
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Storage = storage;
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Connection = connection;
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try
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{
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Prepare();
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}
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catch (Exception e)
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{
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Logger.Error(e, $@"Failed to initialise the {GetType()}! Trying again with a clean database...");
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Prepare(true);
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}
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}
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/// <summary>
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/// Prepare this database for use.
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/// </summary>
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protected abstract void Prepare(bool reset = false);
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/// <summary>
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/// Reset this database to a default state. Undo all changes to database and storage backings.
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/// </summary>
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public void Reset() => Prepare(true);
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public TableQuery<T> Query<T>() where T : class
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{
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return Connection.Table<T>();
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}
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/// <summary>
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/// This is expensive. Use with caution.
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/// </summary>
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public List<T> GetAllWithChildren<T>(Expression<Func<T, bool>> filter = null, bool recursive = true)
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where T : class
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{
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return Connection.GetAllWithChildren(filter, recursive);
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}
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public T GetChildren<T>(T item, bool recursive = false)
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{
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if (item == null) return default(T);
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Connection.GetChildren(item, recursive);
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return item;
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}
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protected abstract Type[] ValidTypes { get; }
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public void Update<T>(T record, bool cascade = true) where T : class
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{
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if (ValidTypes.All(t => t != typeof(T)))
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throw new ArgumentException("Must be a type managed by BeatmapDatabase", nameof(T));
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if (cascade)
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Connection.UpdateWithChildren(record);
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else
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Connection.Update(record);
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}
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}
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} |