using System.Collections.Generic;
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using System.Globalization;
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using DPumpHydr.WinFrmUI.WenSkin.Json.Utilities;
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namespace DPumpHydr.WinFrmUI.WenSkin.Json.Linq.JsonPath
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{
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internal class ArrayIndexFilter : PathFilter
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{
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public int? Index { get; set; }
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public override IEnumerable<JToken> ExecuteFilter(IEnumerable<JToken> current, bool errorWhenNoMatch)
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{
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foreach (JToken t in current)
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{
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if (Index.HasValue)
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{
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JToken tokenIndex = PathFilter.GetTokenIndex(t, errorWhenNoMatch, Index.GetValueOrDefault());
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if (tokenIndex != null)
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{
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yield return tokenIndex;
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}
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}
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else if (t is JArray || t is JConstructor)
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{
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foreach (JToken item in (IEnumerable<JToken>)t)
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{
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yield return item;
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}
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}
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else if (errorWhenNoMatch)
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{
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throw new JsonException("Index * not valid on {0}.".FormatWith(CultureInfo.InvariantCulture, t.GetType().Name));
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}
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}
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}
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}
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}
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