public static IQueryable <TEntity> EagerFetchAll <TEntity>(this IQueryable <TEntity> query)
{
// hack the session reference out of the provider - or is
// there a better way to do this?
//IStatelessSession session = (IStatelessSession)query.Provider.GetType().GetProperty("Session").GetValue(query.Provider);
//ISession session = (ISession)query.Provider.GetType()
// .GetProperty("Session", System.Reflection.BindingFlags.Instance
// | System.Reflection.BindingFlags.NonPublic)
// .GetValue(query.Provider);
var entityType = typeof(TEntity);
var sessionFactory = Ioc.Create <ISessionFactory>();
IClassMetadata metaData = sessionFactory.GetClassMetadata(entityType);
for (int i = 0; i < metaData.PropertyNames.Length; i++)
{
global::NHibernate.Type.IType propType = metaData.PropertyTypes[i];
// get eagerly mapped associations to other entities
if (propType.IsAssociationType && !metaData.PropertyLaziness[i])
{
ParameterExpression par = Expression.Parameter(entityType, "p");
Expression propExp = Expression.Property(par, metaData.PropertyNames[i]);
Type relatedType = null;
LambdaExpression lambdaExp;
string methodName;
if (propType.ReturnedClass.IsGenericCollection())
{
relatedType = propType.ReturnedClass.GetGenericArguments()[0];
var funcType = typeof(Func <,>).MakeGenericType(entityType, typeof(IEnumerable <>).MakeGenericType(relatedType));
lambdaExp = Expression.Lambda(funcType, propExp, par);
methodName = "FetchMany";
}
else
{
relatedType = propType.ReturnedClass;
lambdaExp = Expression.Lambda(propExp, par);
methodName = "Fetch";
}
var fetchManyMethodImpl = typeof(EagerFetchingExtensionMethods).GetMethod(methodName).MakeGenericMethod(entityType, relatedType);
Expression callExpr = Expression.Call(null,
fetchManyMethodImpl,
// first parameter is the query, second is property access expression
query.Expression, lambdaExp
);
LambdaExpression expr = Expression.Lambda(callExpr, par);
Type fetchGenericType = typeof(NhFetchRequest <,>).MakeGenericType(entityType, propType.ReturnedClass);
query = (IQueryable <TEntity>)Activator.CreateInstance(fetchGenericType, query.Provider, callExpr);
}
}
return(query);
}
void IConfigurable.Configure(global::NHibernate.Type.IType type, IDictionary <string, string> parms, global::NHibernate.Dialect.Dialect d)
{
try
{
parameters = parms;
}
catch (Exception ex)
{
//throw new NotImplementedException();
throw ex;
}
}
public int Delete(string query, object value, global::NHibernate.Type.IType type)
{
throw new NotSupportedException(NOT_ALLOWED);
}
