/// <summary>
/// Register the query as a lazy async query in the session and return a lazy async
/// instance that will evaluate the query only when needed
/// </summary>
public Lazy <Task <IEnumerable <S> > > LazilyAsync <S>(Expression expression, Action <IEnumerable <S> > onEval)
{
var processor = GetQueryProviderProcessor <S>();
var query = processor.GetDocumentQueryForAsync(expression);
if (afterQueryExecuted != null)
{
query.AfterQueryExecuted(afterQueryExecuted);
}
var renamedFields = FieldsToFetch.Select(field =>
{
var renamedField = FieldsToRename.FirstOrDefault(x => x.OriginalField == field);
if (renamedField != null)
{
return(renamedField.NewField ?? field);
}
return(field);
}).ToArray();
if (renamedFields.Length > 0)
{
query.AfterQueryExecuted(processor.RenameResults);
}
if (FieldsToFetch.Count > 0)
{
query = query.SelectFields <S>(FieldsToFetch.ToArray(), renamedFields);
}
return(query.LazilyAsync(onEval));
}
/// <summary>
/// Register the query as a lazy query in the session and return a lazy
/// instance that will evaluate the query only when needed
/// </summary>
public Lazy <IEnumerable <S> > Lazily <S>(Expression expression, Action <IEnumerable <S> > onEval)
{
var processor = GetQueryProviderProcessor <S>();
var query = processor.GetLuceneQueryFor(expression);
if (afterQueryExecuted != null)
{
query.AfterQueryExecuted(afterQueryExecuted);
}
var renamedFields = FieldsToFetch.Select(field =>
{
string value;
if (FieldsToRename.TryGetValue(field, out value) && value != null)
{
return(value);
}
return(field);
}).ToArray();
if (renamedFields.Length > 0)
{
query.AfterQueryExecuted(processor.RenameResults);
}
if (FieldsToFetch.Count > 0)
{
query = query.SelectFields <S>(FieldsToFetch.ToArray(), renamedFields);
}
return(query.Lazily(onEval));
}
/// <summary>
/// Convert the expression to a Lucene query
/// </summary>
public IDocumentQuery <TResult> ToDocumentQuery <TResult>(Expression expression)
{
var processor = GetQueryProviderProcessor <T>();
var result = (IDocumentQuery <TResult>)processor.GetDocumentQueryFor(expression);
result.SetResultTransformer(ResultTransformer);
var renamedFields = FieldsToFetch.Select(field =>
{
var renamedField = FieldsToRename.FirstOrDefault(x => x.OriginalField == field);
if (renamedField != null)
{
return(renamedField.NewField ?? field);
}
return(field);
}).ToArray();
if (renamedFields.Length > 0)
{
result.AfterStreamExecuted(processor.RenameSingleResult);
}
return(result);
}