100 lines
2.3 KiB
C#
100 lines
2.3 KiB
C#
using System;
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using System.Linq;
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using System.Text;
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namespace UniJSON
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{
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public struct JsonPointer
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{
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public ArraySegment<Utf8String> Path
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{
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get;
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private set;
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}
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public int Count
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{
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get
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{
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return Path.Count;
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}
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}
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public Utf8String this[int index]
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{
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get
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{
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return Path.Array[Path.Offset + index];
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}
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}
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public JsonPointer Unshift()
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{
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return new JsonPointer
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{
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Path = new ArraySegment<Utf8String>(Path.Array, Path.Offset + 1, Path.Count - 1)
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};
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}
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public static JsonPointer Create(JsonNode node)
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{
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return new JsonPointer
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{
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Path = new ArraySegment<Utf8String>(node.Path().Skip(1).Select(x => GetKeyFromParent(x)).ToArray())
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};
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}
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public JsonPointer(Utf8String pointer) : this()
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{
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int pos;
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if (!pointer.TrySearchAscii((Byte)'/', 0, out pos))
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{
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throw new ArgumentException();
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}
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if (pos != 0)
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{
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throw new ArgumentException();
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}
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var split = pointer.Split((Byte)'/').ToArray();
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Path = new ArraySegment<Utf8String>(split, 1, split.Length - 1);
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}
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public override string ToString()
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{
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if (Path.Count == 0)
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{
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return "/";
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}
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var sb = new StringBuilder();
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var end = Path.Offset + Path.Count;
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for (int i = Path.Offset; i < end; ++i)
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{
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sb.Append('/');
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sb.Append(Path.Array[i]);
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}
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return sb.ToString();
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}
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static Utf8String GetKeyFromParent(JsonNode json)
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{
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var parent = json.Parent;
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if (parent.IsArray())
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{
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var index = parent.IndexOf(json);
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return Utf8String.From(index);
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}
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else if (parent.IsMap())
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{
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return parent.KeyOf(json);
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}
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else
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{
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throw new NotImplementedException();
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}
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}
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}
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}
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