/// <summary>
/// Adds or objects the given object.
/// </summary>
public static void AddOrUpdate(this ISnapshotDb db, OsmGeo osmGeo)
{
db.AddOrUpdate(new OsmGeo[] { osmGeo });
}
private ICompleteOsmGeo _current; // Holds the current complete object.
/// <summary>
/// Moves to the next object.
/// </summary>
public override bool MoveNext()
{
if (!_cachingDone)
{ // first seek & cache.
this.Seek();
_cachingDone = true;
}
while (_simpleSource.MoveNext())
{ // there is data.
var currentSimple = _simpleSource.Current();
switch (currentSimple.Type)
{
case OsmGeoType.Node:
// create complete version.
_current = currentSimple as Node;
if (_current != null && _current.Tags == null)
{ // make sure nodes have a default tag collection that is empty not null.
_current.Tags = new OsmSharp.Tags.TagsCollection();
}
if (_nodesToInclude.Contains(currentSimple.Id.Value))
{ // node needs to be cached.
_dataCache.AddOrUpdate(currentSimple as Node);
_nodesToInclude.Remove(currentSimple.Id.Value);
}
break;
case OsmGeoType.Way:
// create complete way.
_current = (currentSimple as Way).CreateComplete(_dataCache);
if (_waysToInclude.Contains(currentSimple.Id.Value))
{ // keep the way because it is needed later on.
_dataCache.AddOrUpdate(currentSimple as Way);
_waysToInclude.Remove(currentSimple.Id.Value);
}
else
{ // only report that the nodes have been used when the way can be let-go.
var way = currentSimple as Way;
if (way.Nodes != null)
{ // report usage.
for (var i = 0; i < way.Nodes.Length; i++)
{
this.ReportNodeUsage(way.Nodes[i]);
}
}
}
break;
case OsmGeoType.Relation:
// create complate relation.
_current = (currentSimple as Relation).CreateComplete(_dataCache);
if (!_relationsToInclude.Contains(currentSimple.Id.Value))
{ // only report relation usage when the relation can be let go.
var relation = currentSimple as Relation;
if (relation.Members != null)
{
foreach (var member in relation.Members)
{
switch (member.Type)
{
case OsmGeoType.Node:
this.ReportNodeUsage(member.Id);
break;
case OsmGeoType.Way:
this.ReportWayUsage(member.Id);
break;
case OsmGeoType.Relation:
this.ReportRelationUsage(member.Id);
break;
}
}
}
}
break;
}
if (_current != null)
{ // only return complete objects.
return(true);
}
}
return(false);
}
