using Newtonsoft.Json.Utilities; using System; namespace Newtonsoft.Json.Linq { public class JTokenReader : JsonReader, IJsonLineInfo { private readonly JToken _root; private string _initialPath; private JToken _parent; private JToken _current; public JToken CurrentToken => _current; int IJsonLineInfo.LineNumber { get { if (base.CurrentState == State.Start) return 0; return ((IJsonLineInfo)_current)?.LineNumber ?? 0; } } int IJsonLineInfo.LinePosition { get { if (base.CurrentState == State.Start) return 0; return ((IJsonLineInfo)_current)?.LinePosition ?? 0; } } public override string Path { get { string text = base.Path; if (_initialPath == null) _initialPath = _root.Path; if (!string.IsNullOrEmpty(_initialPath)) { if (string.IsNullOrEmpty(text)) return _initialPath; text = ((!StringUtils.StartsWith(text, '[')) ? (_initialPath + "." + text) : (_initialPath + text)); } return text; } } public JTokenReader(JToken token) { ValidationUtils.ArgumentNotNull(token, "token"); _root = token; } internal JTokenReader(JToken token, string initialPath) : this(token) { _initialPath = initialPath; } public override bool Read() { if (base.CurrentState != 0) { if (_current == null) return false; JContainer jContainer = _current as JContainer; if (jContainer != null && _parent != jContainer) return ReadInto(jContainer); return ReadOver(_current); } _current = _root; SetToken(_current); return true; } private bool ReadOver(JToken t) { if (t == _root) return ReadToEnd(); JToken next = t.Next; if (next == null || next == t || t == t.Parent.Last) { if (t.Parent == null) return ReadToEnd(); return SetEnd(t.Parent); } _current = next; SetToken(_current); return true; } private bool ReadToEnd() { _current = null; SetToken(JsonToken.None); return false; } private JsonToken? GetEndToken(JContainer c) { switch (c.Type) { case JTokenType.Object: return JsonToken.EndObject; case JTokenType.Array: return JsonToken.EndArray; case JTokenType.Constructor: return JsonToken.EndConstructor; case JTokenType.Property: return null; default: throw MiscellaneousUtils.CreateArgumentOutOfRangeException("Type", c.Type, "Unexpected JContainer type."); } } private bool ReadInto(JContainer c) { JToken first = c.First; if (first == null) return SetEnd(c); SetToken(first); _current = first; _parent = c; return true; } private bool SetEnd(JContainer c) { JsonToken? endToken = GetEndToken(c); if (endToken.HasValue) { SetToken(endToken.GetValueOrDefault()); _current = c; _parent = c; return true; } return ReadOver(c); } private void SetToken(JToken token) { switch (token.Type) { case JTokenType.Object: SetToken(JsonToken.StartObject); break; case JTokenType.Array: SetToken(JsonToken.StartArray); break; case JTokenType.Constructor: SetToken(JsonToken.StartConstructor, ((JConstructor)token).Name); break; case JTokenType.Property: SetToken(JsonToken.PropertyName, ((JProperty)token).Name); break; case JTokenType.Comment: SetToken(JsonToken.Comment, ((JValue)token).Value); break; case JTokenType.Integer: SetToken(JsonToken.Integer, ((JValue)token).Value); break; case JTokenType.Float: SetToken(JsonToken.Float, ((JValue)token).Value); break; case JTokenType.String: SetToken(JsonToken.String, ((JValue)token).Value); break; case JTokenType.Boolean: SetToken(JsonToken.Boolean, ((JValue)token).Value); break; case JTokenType.Null: SetToken(JsonToken.Null, ((JValue)token).Value); break; case JTokenType.Undefined: SetToken(JsonToken.Undefined, ((JValue)token).Value); break; case JTokenType.Date: SetToken(JsonToken.Date, ((JValue)token).Value); break; case JTokenType.Raw: SetToken(JsonToken.Raw, ((JValue)token).Value); break; case JTokenType.Bytes: SetToken(JsonToken.Bytes, ((JValue)token).Value); break; case JTokenType.Guid: SetToken(JsonToken.String, SafeToString(((JValue)token).Value)); break; case JTokenType.Uri: { object value = ((JValue)token).Value; Uri uri = value as Uri; SetToken(JsonToken.String, (uri != (Uri)null) ? uri.OriginalString : SafeToString(value)); break; } case JTokenType.TimeSpan: SetToken(JsonToken.String, SafeToString(((JValue)token).Value)); break; default: throw MiscellaneousUtils.CreateArgumentOutOfRangeException("Type", token.Type, "Unexpected JTokenType."); } } private string SafeToString(object value) { return value?.ToString(); } bool IJsonLineInfo.HasLineInfo() { if (base.CurrentState == State.Start) return false; return ((IJsonLineInfo)_current)?.HasLineInfo() ?? false; } } }