internal void UpdateSortedPropertyCache(ref ReadStackFrame frame)
{
// Set the sorted property cache. Overwrite any existing cache which can occur in multi-threaded cases.
// Todo: on classes with many properties (about 50) we need to switch to a hashtable.
if (frame.PropertyRefCache != null)
{
List <PropertyRef> cache = frame.PropertyRefCache;
// Add any missing properties. This creates a consistent cache count which is important for
// the loop in GetProperty() when there are multiple threads in a race conditions each generating
// a cache for a given POCO type but with different property counts in the json.
while (cache.Count < _propertyRefs.Count)
{
for (int iProperty = 0; iProperty < _propertyRefs.Count; iProperty++)
{
PropertyRef propertyRef = _propertyRefs[iProperty];
bool found = false;
int iCacheProperty = 0;
for (; iCacheProperty < cache.Count; iCacheProperty++)
{
if (IsPropertyRefEqual(ref propertyRef, cache[iCacheProperty]))
{
// The property is already cached, skip to the next property.
found = true;
break;
}
}
if (found == false)
{
cache.Add(propertyRef);
break;
}
}
}
Debug.Assert(cache.Count == _propertyRefs.Count);
_propertyRefsSorted = cache.ToArray();
frame.PropertyRefCache = null;
}
}
private JsonPropertyInfo GetPropertyThatHasAttribute(Type attributeType)
{
Debug.Assert(_propertyRefs != null);
JsonPropertyInfo property = null;
for (int iProperty = 0; iProperty < _propertyRefs.Count; iProperty++)
{
PropertyRef propertyRef = _propertyRefs[iProperty];
JsonPropertyInfo jsonPropertyInfo = propertyRef.Info;
Attribute attribute = jsonPropertyInfo.PropertyInfo.GetCustomAttribute(attributeType);
if (attribute != null)
{
if (property != null)
{
ThrowHelper.ThrowInvalidOperationException_SerializationDuplicateAttribute(attributeType);
}
property = jsonPropertyInfo;
}
}
return(property);
}
internal JsonPropertyInfo GetProperty(ReadOnlySpan <byte> propertyName, ref ReadStackFrame frame)
{
ulong key = GetKey(propertyName);
JsonPropertyInfo info = null;
// First try sorted lookup.
int propertyIndex = frame.PropertyIndex;
// If we're not trying to build the cache locally, and there is an existing cache, then use it.
bool hasPropertyCache = frame.PropertyRefCache == null && _propertyRefsSorted != null;
if (hasPropertyCache)
{
// This .Length is consistent no matter what json data intialized _propertyRefsSorted.
int count = _propertyRefsSorted.Length;
if (count != 0)
{
int iForward = propertyIndex;
int iBackward = propertyIndex - 1;
while (iForward < count || iBackward >= 0)
{
if (iForward < count)
{
if (TryIsPropertyRefEqual(ref _propertyRefsSorted[iForward], propertyName, key, ref info))
{
return(info);
}
++iForward;
}
if (iBackward >= 0)
{
if (TryIsPropertyRefEqual(ref _propertyRefsSorted[iBackward], propertyName, key, ref info))
{
return(info);
}
--iBackward;
}
}
}
}
// Try the main list which has all of the properties in a consistent order.
// We could get here even when hasPropertyCache==true if there is a race condition with different json
// property ordering and _propertyRefsSorted is re-assigned while in the loop above.
for (int i = 0; i < _propertyRefs.Count; i++)
{
PropertyRef propertyRef = _propertyRefs[i];
if (TryIsPropertyRefEqual(ref propertyRef, propertyName, key, ref info))
{
break;
}
}
if (!hasPropertyCache)
{
if (propertyIndex == 0)
{
// Create the temporary list on first property access to prevent a partially filled List.
Debug.Assert(frame.PropertyRefCache == null);
frame.PropertyRefCache = new List <PropertyRef>();
}
if (info != null)
{
Debug.Assert(frame.PropertyRefCache != null);
frame.PropertyRefCache.Add(new PropertyRef(key, info));
}
}
return(info);
}
internal JsonPropertyInfo GetProperty(JsonSerializerOptions options, ReadOnlySpan <byte> propertyName, ref ReadStackFrame frame)
{
// If we should compare with case-insensitive, normalize to an uppercase format since that is what is cached on the propertyInfo.
if (options.PropertyNameCaseInsensitive)
{
string utf16PropertyName = JsonHelpers.Utf8GetString(propertyName);
string upper = utf16PropertyName.ToUpperInvariant();
propertyName = Encoding.UTF8.GetBytes(upper);
}
ulong key = GetKey(propertyName);
JsonPropertyInfo info = null;
// First try sorted lookup.
int propertyIndex = frame.PropertyIndex;
// If we're not trying to build the cache locally, and there is an existing cache, then use it.
bool hasPropertyCache = frame.PropertyRefCache == null && _propertyRefsSorted != null;
if (hasPropertyCache)
{
// This .Length is consistent no matter what json data intialized _propertyRefsSorted.
int count = _propertyRefsSorted.Length;
if (count != 0)
{
int iForward = propertyIndex;
int iBackward = propertyIndex - 1;
while (iForward < count || iBackward >= 0)
{
if (iForward < count)
{
if (TryIsPropertyRefEqual(ref _propertyRefsSorted[iForward], propertyName, key, ref info))
{
return(info);
}
++iForward;
}
if (iBackward >= 0)
{
if (TryIsPropertyRefEqual(ref _propertyRefsSorted[iBackward], propertyName, key, ref info))
{
return(info);
}
--iBackward;
}
}
}
}
// Try the main list which has all of the properties in a consistent order.
// We could get here even when hasPropertyCache==true if there is a race condition with different json
// property ordering and _propertyRefsSorted is re-assigned while in the loop above.
for (int i = 0; i < _propertyRefs.Count; i++)
{
PropertyRef propertyRef = _propertyRefs[i];
if (TryIsPropertyRefEqual(ref propertyRef, propertyName, key, ref info))
{
break;
}
}
if (!hasPropertyCache)
{
if (propertyIndex == 0 && frame.PropertyRefCache == null)
{
// Create the temporary list on first property access to prevent a partially filled List.
frame.PropertyRefCache = new List <PropertyRef>();
}
if (info != null)
{
Debug.Assert(frame.PropertyRefCache != null);
frame.PropertyRefCache.Add(new PropertyRef(key, info));
}
}
return(info);
}