/// <summary>
/// Imports a graph from the given file.
/// The format is determined by the file extension.
/// Any errors will be reported by exception.
/// </summary>
/// <param name="importFilename">The filename of the file to be imported,
/// the model specification part will be ignored.</param>
/// <param name="backend">The backend to use to create the graph.</param>
/// <param name="graphModel">The graph model to be used,
/// it must be conformant to the model used in the file to be imported.</param>
/// <param name="actions">Receives the actions object in case a .grg model is given.</param>
/// <returns>The imported graph.
/// The .grs/.grsi importer returns an INamedGraph. If you don't need it: create an LGSPGraph from it and throw the named graph away.
/// (the naming requires about the same amount of memory the raw graph behind it requires).</returns>
public static IGraph Import(String importFilename, IBackend backend, IGraphModel graphModel, out IActions actions)
{
if (importFilename.EndsWith(".gxl", StringComparison.InvariantCultureIgnoreCase))
{
return(GXLImport.Import(importFilename, backend, graphModel, out actions));
}
else if (importFilename.EndsWith(".grs", StringComparison.InvariantCultureIgnoreCase) ||
importFilename.EndsWith(".grsi", StringComparison.InvariantCultureIgnoreCase))
{
return(GRSImport.Import(importFilename, backend, graphModel, out actions));
}
else
{
throw new NotSupportedException("File format not supported");
}
}
/// <summary>
/// Imports a graph from the given files.
/// If the filenames only specify a model, the graph is empty.
/// The format is determined by the file extensions.
/// Currently available are: .grs/.grsi or .gxl or .ecore with .xmi.
/// Optionally suffixed by .gz; in this case they are expected to be gzipped.
/// Any error will be reported by exception.
/// </summary>
/// <param name="backend">The backend to use to create the graph.</param>
/// <param name="filenameParameters">The names of the files to be imported.</param>
/// <param name="actions">Receives the actions object in case a .grg model is given.</param>
/// <returns>The imported graph.
/// The .grs/.grsi importer returns an INamedGraph. If you don't need it: create an LGSPGraph from it and throw the named graph away.
/// (the naming requires about the same amount of memory the raw graph behind it requires).</returns>
public static IGraph Import(IBackend backend, List <String> filenameParameters, out IActions actions)
{
String first = ListGet(filenameParameters, 0);
FileInfo fi = new FileInfo(first);
long fileSize = fi.Length;
StreamReader reader = null;
if (first.EndsWith(".gz", StringComparison.InvariantCultureIgnoreCase))
{
FileStream filereader = new FileStream(first, FileMode.Open, FileAccess.Read);
reader = new StreamReader(new GZipStream(filereader, CompressionMode.Decompress));
first = first.Substring(0, first.Length - 3);
}
else
{
reader = new StreamReader(first);
}
using (reader)
{
if (first.EndsWith(".gxl", StringComparison.InvariantCultureIgnoreCase))
{
return(GXLImport.Import(reader, ListGet(filenameParameters, 1), backend, out actions));
}
else if (first.EndsWith(".grs", StringComparison.InvariantCultureIgnoreCase) ||
first.EndsWith(".grsi", StringComparison.InvariantCultureIgnoreCase))
{
return(GRSImport.Import(reader, fileSize, ListGet(filenameParameters, 1), backend, out actions));
}
else if (first.EndsWith(".ecore", StringComparison.InvariantCultureIgnoreCase))
{
List <String> ecores = new List <String>();
String grg = null;
String xmi = null;
bool noPackageNamePrefix = false;
foreach (String filename in filenameParameters)
{
if (filename.EndsWith(".ecore"))
{
ecores.Add(filename);
}
else if (filename.EndsWith(".grg"))
{
if (grg != null)
{
throw new NotSupportedException("Only one .grg file supported");
}
grg = filename;
}
else if (filename.EndsWith(".xmi"))
{
if (xmi != null)
{
throw new NotSupportedException("Only one .xmi file supported");
}
xmi = filename;
}
else if (filename == "nopackagenameprefix")
{
noPackageNamePrefix = true;
}
}
return(ECoreImport.Import(backend, ecores, grg, xmi, noPackageNamePrefix, out actions));
}
else
{
throw new NotSupportedException("File format not supported");
}
}
}
