/// <summary>
/// Determines whether a file or directory exists on an Xbox.
/// </summary>
/// <param name="systemIpAddress">The "System Ip" address of the Xbox kit.</param>
/// <param name="path">The file or directory to look for.</param>
/// <param name="additionalExistsPredicate">The optional additional logic to determine existence based on XboxFileSystemInfoDefinition.</param>
/// <param name="consoleAdapter">The Xbox console to search on.</param>
/// <returns>A value indicating whether the file or directory exists on the console or not.</returns>
internal static bool ExistsImpl(string systemIpAddress, XboxPath path, Func <XboxFileSystemInfoDefinition, bool> additionalExistsPredicate, XboxConsoleAdapterBase consoleAdapter)
{
XboxFileSystemInfoDefinition definition;
try
{
definition = consoleAdapter.GetFileSystemInfoDefinition(systemIpAddress, path);
}
catch (FileNotFoundException)
{
return(false);
}
catch (UnauthorizedAccessException)
{
// Following the same approach as in .NET, returning false without throwing an exception in case of insufficient permissions:
// http://msdn.microsoft.com/en-us/library/system.io.file.exists.aspx
return(false);
}
if (additionalExistsPredicate != null)
{
return(additionalExistsPredicate(definition));
}
return(true);
}
/// <summary>
/// Initializes a new instance of the <see cref="XboxFileInfo"/> class.
/// </summary>
/// <param name="definition">The definition object describing this file.</param>
/// <param name="console">The console on which the file resides.</param>
internal XboxFileInfo(XboxFileSystemInfoDefinition definition, XboxConsole console)
: base(definition, console)
{
if (definition.FileAttributes.HasFlag(FileAttributes.Directory))
{
throw new ArgumentException("Cannot pass a directory to the XboxFileInfo constructor", "definition");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="XboxFileSystemInfo"/> class.
/// </summary>
/// <param name="definition">The definition of this file sytsem object.</param>
/// <param name="console">The console on which this file system object resides.</param>
/// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="definition"/> or <paramref name="console"/> parameter is null.</exception>
internal XboxFileSystemInfo(XboxFileSystemInfoDefinition definition, XboxConsole console)
: base(console)
{
if (definition == null)
{
throw new ArgumentNullException("definition");
}
this.XboxPath = definition.Path;
this.definition = definition;
}
/// <summary>
/// Refreshes this instance.
/// </summary>
public void Refresh()
{
lock (this.definitionLock)
{
try
{
this.definition = this.Console.Adapter.GetFileSystemInfoDefinition(this.Console.SystemIpAddressAndSessionKeyCombined, this.XboxPath);
}
catch (FileNotFoundException)
{
this.definition = null;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="XboxDirectoryInfo"/> class.
/// </summary>
/// <param name="definition">The definition of the directory.</param>
/// <param name="console">The console on which the directory resides.</param>
internal XboxDirectoryInfo(XboxFileSystemInfoDefinition definition, XboxConsole console)
: base(definition, console)
{
}
