/// <summary>
/// Load a <see cref="JObject" /> from a string that contains JSON.
/// </summary>
/// <param name="json">A <see cref="string" /> that contains JSON.</param>
/// <param name="settings">
/// The <see cref="JsonLoadSettings" /> used to load the JSON.
/// If this is <c>null</c>, default load settings will be used.
/// </param>
/// <returns>A <see cref="JObject" /> populated from the string that contains JSON.</returns>
/// <exception cref="JsonReaderException">
/// <paramref name="json" /> is not valid JSON.
/// </exception>
/// <example>
/// <code lang="cs" source="..\Src\Newtonsoft.Json.Tests\Documentation\LinqToJsonTests.cs"
/// region="LinqToJsonCreateParse" title="Parsing a JSON Object from Text" />
/// </example>
public new static JObject Parse(string json, JsonLoadSettings settings)
{
using (JsonReader reader = new JsonTextReader(new StringReader(json)))
{
var o = Load(reader, settings);
while (reader.Read())
{
// Any content encountered here other than a comment will throw in the reader.
}
return(o);
}
}
internal void ReadTokenFrom(JsonReader reader, JsonLoadSettings options)
{
var startDepth = reader.Depth;
if (!reader.Read())
{
throw JsonReaderException.Create(reader, "Error reading {0} from JsonReader.".FormatWith(CultureInfo.InvariantCulture, GetType().Name));
}
ReadContentFrom(reader, options);
var endDepth = reader.Depth;
if (endDepth > startDepth)
{
throw JsonReaderException.Create(reader, "Unexpected end of content while loading {0}.".FormatWith(CultureInfo.InvariantCulture, GetType().Name));
}
}
internal void ReadContentFrom(JsonReader r, JsonLoadSettings settings)
{
ValidationUtils.ArgumentNotNull(r, nameof(r));
var lineInfo = r as IJsonLineInfo;
var parent = this;
do
{
if ((parent as JProperty)?.Value != null)
{
if (parent == this)
{
return;
}
parent = parent.Parent;
}
switch (r.TokenType)
{
case JsonToken.None:
// new reader. move to actual content
break;
case JsonToken.StartArray:
var a = new JArray();
a.SetLineInfo(lineInfo, settings);
parent.Add(a);
parent = a;
break;
case JsonToken.EndArray:
if (parent == this)
{
return;
}
parent = parent.Parent;
break;
case JsonToken.StartObject:
var o = new JObject();
o.SetLineInfo(lineInfo, settings);
parent.Add(o);
parent = o;
break;
case JsonToken.EndObject:
if (parent == this)
{
return;
}
parent = parent.Parent;
break;
case JsonToken.StartConstructor:
var constructor = new JConstructor(r.Value.ToString());
constructor.SetLineInfo(lineInfo, settings);
parent.Add(constructor);
parent = constructor;
break;
case JsonToken.EndConstructor:
if (parent == this)
{
return;
}
parent = parent.Parent;
break;
case JsonToken.String:
case JsonToken.Integer:
case JsonToken.Float:
case JsonToken.Date:
case JsonToken.Boolean:
case JsonToken.Bytes:
var v = new JValue(r.Value);
v.SetLineInfo(lineInfo, settings);
parent.Add(v);
break;
case JsonToken.Comment:
if (settings != null && settings.CommentHandling == CommentHandling.Load)
{
v = JValue.CreateComment(r.Value.ToString());
v.SetLineInfo(lineInfo, settings);
parent.Add(v);
}
break;
case JsonToken.Null:
v = JValue.CreateNull();
v.SetLineInfo(lineInfo, settings);
parent.Add(v);
break;
case JsonToken.Undefined:
v = JValue.CreateUndefined();
v.SetLineInfo(lineInfo, settings);
parent.Add(v);
break;
case JsonToken.PropertyName:
var propertyName = r.Value.ToString();
var property = new JProperty(propertyName);
property.SetLineInfo(lineInfo, settings);
var parentObject = (JObject)parent;
// handle multiple properties with the same name in JSON
var existingPropertyWithName = parentObject.Property(propertyName);
if (existingPropertyWithName == null)
{
parent.Add(property);
}
else
{
existingPropertyWithName.Replace(property);
}
parent = property;
break;
default:
throw new InvalidOperationException("The JsonReader should not be on a token of type {0}.".FormatWith(CultureInfo.InvariantCulture, r.TokenType));
}
} while (r.Read());
}
