/// <summary>
/// Reads a configuration using the specified encryption engine from the specified path
/// </summary>
/// <param name="encryptionEngine">The encryption engine to use while reading the configuration, null if no decryption is desired</param>
/// <param name="configuration">The configuration to be read into</param>
/// <param name="path">The path to be read from</param>
/// <returns></returns>
public static bool ReadConfiguration(FileEncryptionEngine encryptionEngine, out XmlConfiguration configuration, string path)
{
Stream stream = null;
ConfigurationEngine.ResetLastException();
try
{
configuration = new XmlConfiguration();
stream = (encryptionEngine != null ? encryptionEngine.CreateDecryptorStream(path) : new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.None));
XmlConfigurationReader reader = new XmlConfigurationReader();
configuration = reader.Read(stream);
configuration.Path = path;
configuration.SetHasUnpersistedChanges(false);
return(true);
}
catch (System.Exception systemException)
{
System.Diagnostics.Trace.WriteLine(systemException);
_lastException = systemException;
}
finally
{
try
{
if (stream != null)
{
stream.Close();
}
}
catch { }
}
configuration = null;
return(false);
}
/// <summary>
/// Reads a configuration using the specified encryption engine from the specified path
/// </summary>
/// <param name="encryptionEngine">The encryption engine to use while reading the configuration, null if no decryption is desired</param>
/// <param name="configuration">The configuration to be read into</param>
/// <param name="path">The path to be read from</param>
/// <returns></returns>
public static bool ReadConfiguration(FileEncryptionEngine encryptionEngine, out XmlConfiguration configuration, string path)
{
Stream stream = null;
ConfigurationEngine.ResetLastException();
try
{
configuration = new XmlConfiguration();
stream = (encryptionEngine != null ? encryptionEngine.CreateDecryptorStream(path) : new FileStream(path, FileMode.Open, FileAccess.Read , FileShare.None));
XmlConfigurationReader reader = new XmlConfigurationReader();
configuration = reader.Read(stream);
configuration.Path = path;
configuration.SetHasUnpersistedChanges(false);
return true;
}
catch(System.Exception systemException)
{
System.Diagnostics.Trace.WriteLine(systemException);
_lastException = systemException;
}
finally
{
try
{
if (stream != null) stream.Close();
}
catch { }
}
configuration = null;
return false;
}
/// <summary>
/// Gets an XmlConfiguration using a elementName, optionally creates a new or loads an existing configuration (.xml) file using the path specified, and optionally adds it to the collection if new
/// </summary>
/// <param name="elementName">The elementName by which this collection will be accessed</param>
/// <param name="createIfNotFound">A flag indicating whether the configuration should be created if it does not exist</param>
/// <param name="path">The path to the configuration</param>
public XmlConfiguration this[string elementName, bool createIfNotFound, bool addToCollectionIfNew, string path]
{
get
{
/// try and find the configuration in the collection
XmlConfiguration configuration = this[elementName];
/// if it's not in the collection
if (configuration == null)
{
/// perhaps it does in the filesystem, if so then read it, and optionally add it to the collection
if (File.Exists(path))
{
try
{
FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read);
XmlConfigurationReader reader = new XmlConfigurationReader();
configuration = reader.Read(stream);
configuration.Path = path;
stream.Close();
if (addToCollectionIfNew)
this.Add(configuration);
return configuration;
}
catch (System.Exception systemException)
{
System.Diagnostics.Trace.WriteLine(systemException);
}
}
/// apparently it doesnt' exist in the filesystem
if (createIfNotFound)
{
/// so create a new file
configuration = new XmlConfiguration();
configuration.Path = path;
configuration.ElementName = elementName;
/// save the blank config
Directory.CreateDirectory(path);
FileStream stream = new FileStream(path, FileMode.Create, FileAccess.Write);
XmlConfigurationWriter writer = new XmlConfigurationWriter();
writer.Write(configuration, stream, false);
stream.Close();
/// add it to the config if so instructed
if (addToCollectionIfNew)
this.Add(configuration);
}
}
return configuration;
}
}
