public IObservable<OsmEntity> ReadEntities(XmlReader reader,Stream underlyingStream,OperationCountDelegate progressDelegate)
{
var mapper = new OsmEntityMapper();
var streamLength = underlyingStream.Length;
var operationCounter = new OperationCounter(progressDelegate, streamLength, 1000*1000*100);
reader.MoveToContent();
return CreateElementSource(reader).Select<XElement, OsmEntity>(element =>
{
var increment = underlyingStream.Position - operationCounter.Count;
operationCounter.Increment(increment);
if (element.Name == "node")
{
return mapper.ToNode(element);
}
if (element.Name == "way")
{
return mapper.ToWay(element);
}
if (element.Name == "relation")
{
return mapper.ToRelation(element);
}
return null;
}).Where(e => e != null);
}
public IObservable<OsmEntity> ReadEntities(string filename,OperationCountDelegate progressDelegate )
{
var fileStream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, true);
var xmlReader = XmlReader.Create(fileStream, new XmlReaderSettings() {Async = true});
var observable = ReadEntities(xmlReader, fileStream, progressDelegate).Publish();
observable.Connect();
observable.Subscribe(entity => { }, ex => fileStream.Dispose(), fileStream.Dispose);
return observable;
}
public OperationCounter(OperationCountDelegate action,long totalOperationCount = -1,long callGranularity = 1000L)
{
this.action = action;
this.totalOperationCount = totalOperationCount;
this.callGranularity = callGranularity;
this.lastTime = DateTime.UtcNow;
}