public static bool TryVisitSelect(this MethodCallExpression node, SelectExpressionsCollection options, MemberContext context, out MemberContext newContext)
{
newContext = null;
bool result = node.Method.DeclaringType == typeof(Queryable) && node.Method.Name == Select;
if (result)
{
Expression arg = node.Arguments[1];
if (arg.NodeType == ExpressionType.Quote)
{
LambdaExpression lambda = (LambdaExpression)node.Arguments[1].StripQuotes();
if (lambda.Body is NewExpression selectMember)
{
newContext = new SelectContext(selectMember, context);
}
if (lambda.Body is MemberInitExpression memberInit)
{
newContext = new SelectContext(memberInit, context);
}
if (lambda.Body is ParameterExpression)
{
newContext = context;
return(result);
}
if (newContext != null)
{
options.Fields.Clear();
SelectFieldsVisitor visitor = new SelectFieldsVisitor(context, options);
visitor.Visit(lambda.Body);
return(result);
}
}
throw new InvalidOperationException($"Unable to translate '{Select}' method.");
}
return(result);
}
public SolrQueryProvider(
IExecuter <TEntity> operations,
SolrNetLinqOptions options,
MemberContext context,
SelectExpressionsCollection selectExpressions)
{
Operations = operations ?? throw new ArgumentNullException(nameof(operations));
Options = options ?? throw new ArgumentNullException(nameof(options));
SelectExpressions = selectExpressions ?? new SelectExpressionsCollection();
if (context == null)
{
this.MemberContext = MemberContext.ForType <TEntity>();
this.MemberContext.FieldSerializer = this.Options.SolrFieldSerializer;
this.MemberContext.MappingManager = this.Options.MappingManager;
}
else
{
this.MemberContext = context;
}
}
public SolrQueryTranslator(SolrNetLinqOptions solrNetLinqOptions, MemberContext context, SelectExpressionsCollection selectExpressions)
{
SolrNetLinqOptions = solrNetLinqOptions ?? throw new ArgumentNullException(nameof(solrNetLinqOptions));
Context = context ?? throw new ArgumentNullException(nameof(context));
SelectExpressions = selectExpressions ?? throw new ArgumentNullException(nameof(selectExpressions));
Options = selectExpressions.QueryOptions;
}
