protected override ImmutableSortedDictionary <TKey, TValue> AddRange(ImmutableSortedDictionary <TKey, TValue> values, ref ArraySegment <KeyValuePair <TKey, TValue> > newValues, ISerializationContext context)
{
if (newValues.Count == 1)
{
var pair = newValues.Singleton();
return(values.Add(pair.Key, pair.Value));
}
return(values.AddRange(newValues));
}
/// <summary>
/// Appends the tags.
/// </summary>
/// <param name="writer">The writer.</param>
/// <param name="pointSettings">The point settings.</param>
private void AppendTags(StringBuilder writer, PointSettings pointSettings)
{
IReadOnlyDictionary <string, string> entries;
if (pointSettings == null)
{
entries = _tags;
}
else
{
IReadOnlyDictionary <string, string> defaultTags =
pointSettings.GetDefaultTags();
try
{
entries = _tags.AddRange(defaultTags);
}
catch (ArgumentException)
{
// Most cases don't expect to override existing content
// override don't consider as best practice
// therefore it a trade-off between being less efficient
// on the default behavior or on the override scenario
var builder = _tags.ToBuilder();
foreach (var item in defaultTags)
{
var name = item.Key;
if (!builder.ContainsKey(name)) // existing tags overrides
{
builder.Add(name, item.Value);
}
}
entries = builder;
}
}
foreach (var keyValue in entries)
{
var key = keyValue.Key;
var value = keyValue.Value;
if (string.IsNullOrEmpty(key) || string.IsNullOrEmpty(value))
{
continue;
}
writer.Append(',');
EscapeKey(writer, key);
writer.Append('=');
EscapeKey(writer, value);
}
writer.Append(' ');
}
