public Configuration GetSystemConfiguration()
{
FileStream fs = new FileStream ( _configFilePath, FileMode.Open );
XmlTextReader reader = new XmlTextReader ( fs );
Configuration configuration = new Configuration ();
bool result = true;
reader.WhitespaceHandling = WhitespaceHandling.None;
if ( reader.Read () && reader.NodeType == XmlNodeType.XmlDeclaration ) {
if ( reader.Read () && reader.NodeType == XmlNodeType.Element && reader.Name == "Configuration" ) {
while ( result && reader.Read () && reader.NodeType == XmlNodeType.Element ) {
switch ( reader.Name ) {
case "SessionFactory": result = ReadSessionFactory ( reader, configuration );
break;
case "Mappings": result = ReadMappings ( reader, configuration );
break;
default: break;
}
}
reader.Close ();
fs.Close ();
if ( result ) {
return configuration;
} else {
reader.Close ();
fs.Close ();
throw new Exception ( "Invail Config File" );
}
} else {
reader.Close ();
fs.Close ();
throw new Exception ( "Invail Config File" );
}
} else {
reader.Close ();
fs.Close ();
throw new Exception ( "Invail Config File" );
}
}
private bool ReadSessionFactory( XmlTextReader reader, Configuration configuration )
{
bool result = true;
while ( result && reader.Read () && reader.NodeType == XmlNodeType.Element ) {
switch ( reader.Name ) {
case "Database": result = ReadDatabase ( reader, configuration );
break;
case "ConnectionString": result = ReadConnectionString ( reader, configuration );
break;
default: return false;
}
}
if ( result && reader.NodeType == XmlNodeType.EndElement && reader.Name == "SessionFactory" ) {
return true;
} else {
return false;
}
}
private bool ReadMappings( XmlTextReader reader, Configuration configuration )
{
bool result = true;
while ( result && reader.Read () && reader.NodeType == XmlNodeType.Element ) {
if ( reader.Name == "Map" ) {
result = ReadMap ( reader, configuration );
} else {
return false;
}
}
return true;
}
private bool ReadMap( XmlTextReader reader, Configuration configuration )
{
XmlDocument xmlDoc = new XmlDocument ();
EntityMapping map = new EntityMapping ();
XmlNode mapNode;
xmlDoc.Load ( reader.ReadSubtree () );
mapNode = xmlDoc.ChildNodes.Item ( 0 );
map.ClassName = mapNode.Attributes["ClassName"].Value;
map.Keys = mapNode.Attributes["Key"].Value.Split ( new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries );
map.TableName = mapNode.Attributes["TableName"].Value;
for ( int i = 0; i < mapNode.ChildNodes.Count; i++ ) {
XmlNode node = mapNode.ChildNodes.Item ( i );
EntityRelation relation;
if ( node.Name == "Many-to-Many" ) {
relation = GetManyToManyRelation ( node );
if ( relation == null ) {
return false;
}
} else {
relation = new EntityRelation ();
switch ( node.Name ) {
case "One-to-Many": relation.Type = RelationType.OneToMany;
break;
case "One-to-One": relation.Type = RelationType.OneToOne;
break;
case "Many-to-One": relation.Type = RelationType.ManyToOne;
break;
default: return false;
}
relation.KeyColum = node.Attributes["KeyColum"].Value;
relation.Property = node.Attributes["Property"].Value;
relation.ReferenceClassName = node.Attributes["ReferenceClass"].Value;
relation.ReferenceColum = node.Attributes["ReferenceColum"].Value;
}
map.Relations.Add ( relation.Property, relation );
}
configuration.Mappings.Add ( map );
return true;
}
private bool ReadDatabase( XmlTextReader reader, Configuration configuration )
{
bool result = false;
if ( reader.Read () && reader.NodeType == XmlNodeType.Text ) {
switch ( reader.ReadString ().ToLower () ) {
case "sqlserver": configuration.DatabaseType = DatabaseType.SQLServer;
result = true;
break;
case "odbc": configuration.DatabaseType = DatabaseType.Odbc;
result = true;
break;
case "oledb": configuration.DatabaseType = DatabaseType.OleDb;
result = true;
break;
case "oracle": configuration.DatabaseType = DatabaseType.Oracle;
break;
default: return false;
}
}
if ( result && reader.NodeType == XmlNodeType.EndElement && reader.Name == "Database" ) {
return true;
} else {
return false;
}
}
private bool ReadConnectionString( XmlTextReader reader, Configuration configuration )
{
bool result = false;
if ( reader.Read () && reader.NodeType == XmlNodeType.Text ) {
configuration.ConnectionString = reader.ReadString ().Trim ();
result = true;
}
if ( result && reader.NodeType == XmlNodeType.EndElement && reader.Name == "ConnectionString" ) {
return true;
} else {
return false;
}
}
