public override string ToString()
{
var queryParser = FetchXmlQueryParserLoader.CreateFetchXmlQueryParser();
var queryModel = queryParser.GetParsedQuery(_expression);
var queryMetadata = FetchXmlQueryModelVisitor.GetQueryMetadata(queryModel);
var fetchXml = queryMetadata.GetFetchXmlQuery();
return(fetchXml);
}
// Executes a query with a collection result.
public IEnumerable <T> ExecuteCollection <T>(QueryModel queryModel)
{
var queryMetadata = FetchXmlQueryModelVisitor.GetQueryMetadata(queryModel);
var result = ExecuteQuery <T>(queryModel, queryMetadata);
var asEnumerable = (System.Collections.IEnumerable)(result);
foreach (T rec in asEnumerable)
{
yield return(rec);
}
;
}
// Executes a query with a scalar result, i.e. a query that ends with a result operator such as Count, Sum, or Average.
public T ExecuteScalar <T>(QueryModel queryModel)
{
var queryMetadata = FetchXmlQueryModelVisitor.GetQueryMetadata(queryModel);
var result = ExecuteQuery <T>(queryModel, queryMetadata);
var asEnumerable = (System.Collections.IEnumerable)(result);
if (queryMetadata.IsCount)
{
int tot = 0;
foreach (var res in asEnumerable)
{
tot++;
}
return((T)(object)tot);
}
return(ExecuteCollection <T>(queryModel).FirstOrDefault());
}
