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tangxu

2024-12-29 72e75456f8b30ec5b6f355539d9c883b0f810d21

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using System.Collections.Generic;
using System.Globalization;
using DPumpHydr.WinFrmUI.WenSkin.Json.Utilities;
 
namespace DPumpHydr.WinFrmUI.WenSkin.Json.Linq.JsonPath
{
    internal abstract class PathFilter
    {
        public abstract IEnumerable<JToken> ExecuteFilter(IEnumerable<JToken> current, bool errorWhenNoMatch);
 
        protected static JToken GetTokenIndex(JToken t, bool errorWhenNoMatch, int index)
        {
            JArray jArray = t as JArray;
            JConstructor jConstructor = t as JConstructor;
            if (jArray != null)
            {
                if (jArray.Count <= index)
                {
                    if (errorWhenNoMatch)
                    {
                        throw new JsonException("Index {0} outside the bounds of JArray.".FormatWith(CultureInfo.InvariantCulture, index));
                    }
                    return null;
                }
                return jArray[index];
            }
            if (jConstructor != null)
            {
                if (jConstructor.Count <= index)
                {
                    if (errorWhenNoMatch)
                    {
                        throw new JsonException("Index {0} outside the bounds of JConstructor.".FormatWith(CultureInfo.InvariantCulture, index));
                    }
                    return null;
                }
                return jConstructor[index];
            }
            if (errorWhenNoMatch)
            {
                throw new JsonException("Index {0} not valid on {1}.".FormatWith(CultureInfo.InvariantCulture, index, t.GetType().Name));
            }
            return null;
        }
    }
}