/// <summary>
/// 对表达式进行解析，并返回限制数组。
/// </summary>
/// <param name="indexes">数据提供者类别。</param>
/// <param name="metadataType">架构元数组类型。</param>
/// <param name="expression">查询表达式。</param>
/// <returns></returns>
public static string[] GetRestriction(Dictionary <string, int> indexes, Type metadataType, Expression expression)
{
var translator = new SchemaQueryTranslator(indexes, metadataType);
expression = PartialEvaluator.Eval(expression);
return(translator.GetRestrictionValues(expression));
}
/// <summary>
/// 对表达式进行解析，并返回限制值字典。
/// </summary>
/// <param name="expression">查询表达式。</param>
/// <param name="dicRestrMbrs"></param>
/// <returns></returns>
public static RestrictionDictionary GetRestrictions <T>(Expression expression, Dictionary <Type, List <MemberInfo> > dicRestrMbrs)
{
if (expression == null)
{
return(RestrictionDictionary.Empty);
}
var translator = new SchemaQueryTranslator {
_metadataType = typeof(T)
};
if (!dicRestrMbrs.TryGetValue(typeof(T), out List <MemberInfo> properties))
{
throw new SchemaQueryTranslateException(typeof(T));
}
translator._members = properties;
expression = PartialEvaluator.Eval(expression);
translator.Visit(expression);
return(translator._restrDict);
}
