/// <summary>
/// Create an output "file" and return a handle to it.
/// </summary>
public static IFileHandle CreateOutputFile(this IHostEnvironment env, string path)
{
Contracts.AssertValue(env);
Contracts.CheckNonWhiteSpace(path, nameof(path));
return(new SimpleFileHandle(env, path, needsWrite: true, autoDelete: false));
}
internal DataOperationsCatalog(IHostEnvironment env)
{
Contracts.AssertValue(env);
_env = env;
}
private protected TrainCatalogBase(IHostEnvironment env, string registrationName)
{
Contracts.CheckValue(env, nameof(env));
env.CheckNonEmpty(registrationName, nameof(registrationName));
Environment = env;
}
internal bool TryFindColumn(string name, out Column column)
{
Contracts.CheckValue(name, nameof(name));
column = _columns.FirstOrDefault(x => x.Name == name);
return(column.IsValid);
}
public SchemaShape(IEnumerable <Column> columns)
{
Contracts.CheckValue(columns, nameof(columns));
_columns = columns.ToArray();
Contracts.CheckParam(columns.All(c => c.IsValid), nameof(columns), "Some items are not initialized properly.");
}
/// <summary>
/// Make sure the given assemblies are loaded and that their loadable classes have been catalogued.
/// </summary>
public static void LoadAndRegister(IHostEnvironment env, string[] assemblies)
{
Contracts.AssertValue(env);
if (Utils.Size(assemblies) > 0)
{
foreach (string path in assemblies)
{
Exception ex = null;
try
{
// REVIEW: Will LoadFrom ever return null?
Contracts.CheckNonEmpty(path, nameof(path));
var assem = LoadAssembly(env, path);
if (assem != null)
{
continue;
}
}
catch (Exception e)
{
ex = e;
}
// If it is a zip file, load it that way.
ZipArchive zip;
try
{
zip = ZipFile.OpenRead(path);
}
catch (Exception e)
{
// Couldn't load as an assembly and not a zip, so warn the user.
ex = ex ?? e;
Console.Error.WriteLine("Warning: Could not load '{0}': {1}", path, ex.Message);
continue;
}
string dir;
try
{
dir = CreateTempDirectory();
}
catch (Exception e)
{
throw Contracts.ExceptIO(e, "Creating temp directory for extra assembly zip extraction failed: '{0}'", path);
}
try
{
zip.ExtractToDirectory(dir);
}
catch (Exception e)
{
throw Contracts.ExceptIO(e, "Extracting extra assembly zip failed: '{0}'", path);
}
LoadAssembliesInDir(env, dir, false);
}
}
}
public TelemetryException(Exception exception)
{
Contracts.AssertValue(exception);
Exception = exception;
}