/// <summary>
/// Creates a new progress reporting source.
/// </summary>
/// <param name="source"></param>
public ProgressDataProcessorSource(DataProcessorSource source)
{
_source = source;
}
/// <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());
}