public int GetAttributeValueId(OsmAttribute osmAttribute, string value)
{
value = value.Trim();
ConcurrentDictionary <string, int> valueToId = null;
if (!_attributeValueIds.TryGetValue(osmAttribute, out valueToId))
{
lock (_attributeValueIds)
{
if (!_attributeValueIds.TryGetValue(osmAttribute, out valueToId))
{
_attributeValueIds.TryAdd(
osmAttribute,
valueToId = new ConcurrentDictionary <string, int>(StringComparer.InvariantCultureIgnoreCase));
}
}
}
int attributeValueId;
if (valueToId.TryGetValue(value, out attributeValueId))
{
return(attributeValueId);
}
lock (valueToId)
{
attributeValueId = valueToId.Count;
valueToId.TryAdd(value, attributeValueId);
return(attributeValueId);
}
}
public IEnumerable <KeyValuePair <int, string> > GetAttributeValues(OsmAttribute attribute)
{
ConcurrentDictionary <string, int> valueIds;
if (!_attributeValueIds.TryGetValue(attribute, out valueIds))
{
yield break;
}
foreach (var pair in valueIds)
{
yield return(new KeyValuePair <int, string>(pair.Value, pair.Key));
}
}
