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-Reduced allocations of JToken.Path++

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This commit is contained in:
James Newton-King
2016-03-28 19:44:05 +13:00
parent 795ef28e0a
commit 5aa75ae595
1 changed files with 18 additions and 31 deletions
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Src/Newtonsoft.Json/Linq/JToken.cs
+18 -31
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@@ -190,45 +190,32 @@ namespace Newtonsoft.Json.Linq
return string.Empty;
}
List<JToken> ancestors = new List<JToken>();
List<JsonPosition> positions = new List<JsonPosition>();
JToken previous = null;
for (JToken current = this; current != null; current = current.Parent)
{
ancestors.Add(current);
}
ancestors.Reverse();
List<JsonPosition> positions = new List<JsonPosition>(ancestors.Count);
for (int i = 0; i < ancestors.Count; i++)
{
JToken current = ancestors[i];
JToken next = null;
if (i + 1 < ancestors.Count)
switch (current.Type)
{
next = ancestors[i + 1];
}
else if (ancestors[i].Type == JTokenType.Property)
{
next = ancestors[i];
}
if (next != null)
{
switch (current.Type)
{
case JTokenType.Property:
JProperty property = (JProperty)current;
positions.Add(new JsonPosition(JsonContainerType.Object) { PropertyName = property.Name });
break;
case JTokenType.Array:
case JTokenType.Constructor:
int index = ((IList<JToken>)current).IndexOf(next);
case JTokenType.Property:
JProperty property = (JProperty)current;
positions.Add(new JsonPosition(JsonContainerType.Object) { PropertyName = property.Name });
break;
case JTokenType.Array:
case JTokenType.Constructor:
if (previous != null)
{
int index = ((IList<JToken>)current).IndexOf(previous);
positions.Add(new JsonPosition(JsonContainerType.Array) { Position = index });
break;
}
}
break;
}
previous = current;
}
positions.Reverse();
return JsonPosition.BuildPath(positions, null);
}
}