FileContextCore/ValueGeneration/Internal/FileContextValueGeneratorSelector.cs
// Copyright (c) morrisjdev. All rights reserved.
// Original copyright (c) .NET Foundation. All rights reserved.
// Modified version by morrisjdev
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using FileContextCore.Storage.Internal;
using FileContextCore.Utilities;
using JetBrains.Annotations;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Diagnostics;
using Microsoft.EntityFrameworkCore.Metadata;
using Microsoft.EntityFrameworkCore.Utilities;
using Microsoft.EntityFrameworkCore.ValueGeneration;
using Microsoft.Extensions.DependencyInjection;
namespace FileContextCore.ValueGeneration.Internal
{
/// <summary>
/// <para>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </para>
/// <para>
/// The service lifetime is <see cref="ServiceLifetime.Scoped"/>. This means that each
/// <see cref="DbContext"/> instance will use its own instance of this service.
/// The implementation may depend on other services registered with any lifetime.
/// The implementation does not need to be thread-safe.
/// </para>
/// </summary>
public class FileContextValueGeneratorSelector : ValueGeneratorSelector
{
private readonly IFileContextStore _inMemoryStore;
public FileContextValueGeneratorSelector(
[NotNull] ValueGeneratorSelectorDependencies dependencies,
[NotNull] IFileContextDatabase inMemoryDatabase)
: base(dependencies)
{
_inMemoryStore = inMemoryDatabase.Store;
}
public override ValueGenerator Select(IProperty property, IEntityType entityType)
{
Check.NotNull(property, nameof(property));
Check.NotNull(entityType, nameof(entityType));
return property.GetValueGeneratorFactory() == null
&& property.ClrType.IsInteger()
&& property.ClrType.UnwrapNullableType() != typeof(char)
? GetOrCreate(property)
: base.Select(property, entityType);
}
private ValueGenerator GetOrCreate(IProperty property)
{
Check.NotNull(property, nameof(property));
var type = property.ClrType.UnwrapNullableType().UnwrapEnumType();
if (type == typeof(long))
{
return _inMemoryStore.GetIntegerValueGenerator<long>(property);
}
if (type == typeof(int))
{
return _inMemoryStore.GetIntegerValueGenerator<int>(property);
}
if (type == typeof(short))
{
return _inMemoryStore.GetIntegerValueGenerator<short>(property);
}
if (type == typeof(byte))
{
return _inMemoryStore.GetIntegerValueGenerator<byte>(property);
}
if (type == typeof(ulong))
{
return _inMemoryStore.GetIntegerValueGenerator<ulong>(property);
}
if (type == typeof(uint))
{
return _inMemoryStore.GetIntegerValueGenerator<uint>(property);
}
if (type == typeof(ushort))
{
return _inMemoryStore.GetIntegerValueGenerator<ushort>(property);
}
if (type == typeof(sbyte))
{
return _inMemoryStore.GetIntegerValueGenerator<sbyte>(property);
}
throw new ArgumentException(
CoreStrings.InvalidValueGeneratorFactoryProperty(
"FileContextIntegerValueGeneratorFactory", property.Name, property.DeclaringEntityType.DisplayName()));
}
}
}