public static IQueryConfiguration <TEntity> Configure(Func <IQueryConfigurator <TEntity>, IQueryConfigurator <TEntity> > configureCallback)
{
if (configureCallback == null)
{
throw new ArgumentNullException(nameof(configureCallback));
}
var inputConfigurator = new QueryConfigurator <TEntity>();
var outputConfigurator = configureCallback(inputConfigurator);
return(outputConfigurator.OutputConfiguration);
}
public static IQueryConfiguration <TEntity, TOut> Configure <TOut>(Func <IQueryConfigurator <TEntity>, IQueryConfigurator <TEntity, TOut> > configureCallback)
where TOut : class
{
if (configureCallback == null)
{
throw new ArgumentNullException(nameof(configureCallback));
}
var inputConfigurator = new QueryConfigurator <TEntity>();
var transformConfigurator = configureCallback(inputConfigurator);
return(transformConfigurator.TransformConfiguration);
}
public static IQueryProvider <TContext> Build <TContext>(TContext context, Action <IQueryConfigurator <TContext> > options)
where TContext : DbContext
{
// Create a new configuration.
var configuration = new QueryConfiguration <TContext>();
// Configure the configuration.
var configurator = new QueryConfigurator <TContext>(context, configuration);
options(configurator);
// Create the query provider with the configuration.
return(new QueryProvider <TContext>(configuration));
}
public static IQueryConfigurator <TIn, TOut> Select <TIn, TOut>(this IQueryConfigurator <TIn> configurator, Expression <Func <TIn, TOut> > selector)
where TIn : class
where TOut : class
{
if (configurator == null)
{
throw new ArgumentNullException(nameof(configurator));
}
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
var transformSpecification = new SelectQuerySpecification <TIn, TOut>(selector);
var nextConfigurator = new QueryConfigurator <TIn, TOut>(configurator, transformSpecification);
return(nextConfigurator);
}
