/// <summary>
/// Returns the data from the given data source that is inside the given box.
/// </summary>
/// <param name="dataSourceName">The name of the datasource.</param>
/// <param name="box">The bounding box.</param>
/// <returns></returns>
public string RequestData(string dataSourceName, GeoCoordinateBox box)
{
string dataPath = ConfigurationManager.AppSettings["datapath"];
// check of the file exists.
var pbfFile = new FileInfo(dataPath + dataSourceName + ".pbf");
var xmlFile = new FileInfo(dataPath + dataSourceName);
DataProcessorSource source = null;
FileStream sourceStream = null;
NamedSource namedSource;
if (pbfFile.Exists)
{ // first try PBF: more efficient.
// create PBF source.
sourceStream = pbfFile.OpenRead();
source = new PBFDataProcessorSource(sourceStream);
// create filter.
DataProcessorFilter filter = new DataProcessorFilterBoundingBox(box);
filter.RegisterSource(source);
source = filter;
}
else if (xmlFile.Exists)
{ // then try XML.
// create XML source.
sourceStream = xmlFile.OpenRead();
source = new XmlDataProcessorSource(sourceStream);
// create filter.
DataProcessorFilter filter = new DataProcessorFilterBoundingBox(box);
filter.RegisterSource(source);
source = filter;
}
else if (NamedSourceCollection.Instance.TryGetSource(dataSourceName, out namedSource))
{ // then try a named source.
source = namedSource.Get(box);
}
else
{ // oeps! file or named source not found!
throw new FileNotFoundException("File or name source {0} not found!", dataSourceName);
}
// create the target.
var result = new StringBuilder();
var writer = new StringWriter(result);
var target = new XmlDataProcessorTarget(writer);
// execute the processing.
target.RegisterSource(source);
target.Pull();
// close the source stream if needed.
if (sourceStream != null)
{
sourceStream.Close();
sourceStream.Dispose();
}
return result.ToString();
}
private Engine()
{
if (string.IsNullOrWhiteSpace(PbfDataFilePath))
{
throw new NullReferenceException("PbfDataFilePath must be set.");
}
if (!File.Exists(PbfDataFilePath))
{
throw new NullReferenceException("PbfDataFilePath '" + PbfDataFilePath + "' does not exist.");
}
// keeps a memory-efficient version of the osm-tags.
var tagsIndex = new OsmTagsIndex();
// creates a routing interpreter. (used to translate osm-tags into a routable network)
var interpreter = new OsmRoutingInterpreter();
// create a routing datasource, keeps all processed osm routing data.
var osmData = new MemoryRouterDataSource<SimpleWeighedEdge>(tagsIndex);
// load data into this routing datasource.
Stream osmPbfData = new FileInfo(PbfDataFilePath).OpenRead(); // for example moscow!
using (osmPbfData)
{
var targetData = new
SimpleWeighedDataGraphProcessingTarget(
osmData, interpreter, osmData.TagsIndex, VehicleEnum.Car);
// replace this with PBFdataProcessSource when having downloaded a PBF file.
var dataProcessorSource = new
PBFDataProcessorSource(osmPbfData);
// pre-process the data.
var stopwatch = new Stopwatch();
stopwatch.Start();
var sorter = new DataProcessorFilterSort();
sorter.RegisterSource(dataProcessorSource);
targetData.RegisterSource(sorter);
targetData.Pull();
stopwatch.Stop();
}
// create the router object: there all routing functions are available.
router = new Router<SimpleWeighedEdge>(
osmData, interpreter, new DykstraRoutingLive(osmData.TagsIndex));
}
public void PBFDataProcessorSourceReset()
{
// generate the source.
PBFDataProcessorSource source = new PBFDataProcessorSource(
Assembly.GetExecutingAssembly().GetManifestResourceStream("OsmSharp.UnitTests.api.osm.pbf"));
// pull the data out.
DataProcessorTargetEmpty target = new DataProcessorTargetEmpty();
target.RegisterSource(source);
target.Pull();
// reset the source.
if (source.CanReset)
{
source.Reset();
// pull the data again.
target.Pull();
}
}
/// <summary>
/// Tests reading a PBF and see if the data is there.
/// </summary>
/// <param name="resource"></param>
private void TestReadPBF(string resource)
{
// create the pbf source from a pbf in the resources of this assembly.
PBFDataProcessorSource source = new PBFDataProcessorSource(
Assembly.GetExecutingAssembly().GetManifestResourceStream(resource));
// pull the data from the source into the memory data source.
MemoryDataSource data = new MemoryDataSource();
data.PullFromSource(source);
// test the data.
this.TestData(data);
}
/// <summary>
/// Prepares the router.
/// </summary>
private void PrepareRouter()
{
#if DEBUG
OsmSharp.Tools.Output.OutputStreamHost.RegisterOutputStream(
new OsmSharp.Tools.Output.DebugOutputStream());
#endif
// initialize the interpreters.
_interpreter =
new OsmRoutingInterpreter();
string file = OperationProcessor.Settings["pbf_file"];
var tagsIndex = new OsmTagsIndex(new ObjectTable<OsmTagsIndex.OsmTags>(true));
// do the data processing.
var data = new DynamicGraphRouterDataSource<SimpleWeighedEdge>(tagsIndex);
var targetData = new SimpleWeighedDataGraphProcessingTarget(
data, _interpreter, data.TagsIndex, VehicleEnum.Car);
var dataProcessorSource = new PBFDataProcessorSource((new FileInfo(
file)).OpenRead());
var progressSource = new ProgressDataProcessorSource(dataProcessorSource);
targetData.RegisterSource(progressSource);
targetData.Pull();
_data = data; // only set the data property here now after pre-processing!
}
