public EntityPersister(InternalContext context)
{
this.context = context;
Database = context.Database;
entityQueryProvider = new EntityQueryProvider(context);
queryable = new QueryProvider(entityQueryProvider);
environment = context.Environment;
}
/// <summary>
/// 使用 <see cref="IDatabase"/> 对象初始化 <see cref="T:Lord.Data.Entity.EntityPersister`1"/> 类的新实例。
/// </summary>
/// <param name="database">一个 <see cref="IDatabase"/> 对象。</param>
public EntityPersister(IDatabase database)
{
Database = database;
context = new InternalContext(database);
entityQueryProvider = new EntityQueryProvider(context);
queryable = new QueryProvider(entityQueryProvider);
environment = context.Environment;
}
/// <summary>
/// 使用实例名初始化 <see cref="T:Lord.Data.Entity.EntityPersister`1"/> 类的新实例。
/// </summary>
/// <param name="instanceName">实例名。</param>
public EntityPersister(string instanceName = null)
{
metadata = EntityMetadataUnity.GetEntityMetadata(GetEntityType());
context = new InternalContext(instanceName);
Database = context.Database;
entityQueryProvider = new EntityQueryProvider(context);
queryable = new QueryProvider(entityQueryProvider);
entityQueryProvider.InitializeInstanceName(instanceName);
environment = context.Environment;
}
protected override Expression VisitConstant(ConstantExpression constantExpression)
{
if (_entityQueryProvider == null)
{
_entityQueryProvider
= (constantExpression.Value as IQueryable)?.Provider as IEntityQueryProvider;
}
return(constantExpression);
}
/// <summary>
/// 初始化 <see cref="QueryProvider"/> 类的新实例。
/// </summary>
/// <param name="provider"></param>
public QueryProvider(IEntityQueryProvider provider)
{
entityQueryProvider = provider;
}
public EntityQueryable([NotNull] IEntityQueryProvider provider, [NotNull] Expression expression)
: base(
Check.NotNull(provider, nameof(provider)),
Check.NotNull(expression, nameof(expression)))
{
}
public EntityQueryable([NotNull] IEntityQueryProvider provider)
: base(Check.NotNull(provider, nameof(provider)))
{
}
private static EntityQueryable <TResult> _CreateEntityQueryable <TResult>(IEntityQueryProvider entityQueryProvider) => new EntityQueryable <TResult>(entityQueryProvider);
private NavigationRewritingExpressionVisitor(
EntityQueryModelVisitor queryModelVisitor, IEntityQueryProvider entityQueryProvider)
: this(queryModelVisitor)
{
_entityQueryProvider = entityQueryProvider;
}
