async Task <object> getValue1(string template, IDictionary <string, object> variables, bool isVariable, object @object = null)
{
//枚举
if (template.IndexOf("=>") > 0)
{
var segments = template.Split(new[] { "=>" }, 2, StringSplitOptions.RemoveEmptyEntries);
var template_resource = segments[0];
var template_enumeration = segments[1];
var includes = new IncludeParser(template_enumeration, templates).Parse();
var value = await getValue2(template_resource, includes, variables, @object);
var queryable = value is Resource
? (value as Resource)?.Queryable
: (value as IEnumerable)?.AsQueryable();
if (queryable == null)
{
return(null);
}
var isArrayReturn = template_enumeration.EndsWith("[]");
if (isArrayReturn)
{
template_enumeration = template_enumeration.Substring(0, template_enumeration.Length - 2);
}
if (jsonqlLinqer != null)
{
var selector = new SelectParser(templates).Parse(template_enumeration);
if (!string.IsNullOrWhiteSpace(selector))
{
queryable = jsonqlLinqer.Select(queryable, selector);
}
}
if (isArrayReturn)
{
var list = new List <object>();
var source = jsonqlLinqer == null?QueryableHelper.ToList(queryable) : jsonqlLinqer.ToList(queryable);
foreach (var item in source)
{
list.Add(await getValue1(template_enumeration, variables, false, item));
}
return(list);
}
else
{
var first = jsonqlLinqer == null
? QueryableHelper.FirstOrDefault(queryable)
: jsonqlLinqer.FirstOrDefault(queryable);
if (first == null)
{
return(null);
}
return(await getValue1(template_enumeration, variables, false, first));
}
}
//取值
else
{
var value = await getValue2(template, null, variables, @object);
if (value is Resource)
{
if (isVariable)
{
return(value);
}
else
{
var queryable = (value as Resource).Queryable;
return(jsonqlLinqer == null
? QueryableHelper.ToList(queryable)
: jsonqlLinqer.ToList(queryable));
}
}
return(value);
}
}
/// <summary>
///
/// </summary>
/// <param name="selector"></param>
/// <returns></returns>
public Resource Select(string selector)
{
return(new Resource(JsonqlLinqer.Select(Queryable, selector, Parameters), JsonqlIncluder, JsonqlLinqer));
}