/// <summary>
/// Load first entity from file with specific template
/// </summary>
/// <remarks>This method is usually used to load form data</remarks>
/// <typeparam name="T">Entity class</typeparam>
/// <param name="filePath">Path of file that contains entity data</param>
/// <param name="templateName">Name of template used to parse data from file</param>
/// <returns>The entity data</returns>
public T LoadOne <T>(String filePath, String templateName) where T : class, new()
{
// Find parser
TemplateConfigElement templateCfg = _cfg.Templates[templateName];
if (templateCfg == null)
{
throw new ConfigurationErrorsException(String.Format("Template {0} not exist!", templateName));
}
var parserCfg = _cfg.Parsers[templateCfg.Parser] as ParserConfigElement;
if (parserCfg == null)
{
throw new ConfigurationErrorsException(String.Format("Parser {0} not configured!", templateCfg.Parser));
}
Type parserType = Type.GetType(parserCfg.Type);
if (parserType == null)
{
throw new ConfigurationErrorsException(String.Format("Parser {0} not exist!", parserCfg.Type));
}
// Create parser
var parser = parserType.Assembly.CreateInstance(parserType.FullName) as IDataParser;
if (parser == null)
{
throw new ConfigurationErrorsException(String.Format("Cannot create instance of parser {0}!",
parserType.FullName));
}
// Open file
if (!parser.Open(filePath))
{
throw new InvalidOperationException(String.Format("Cannot open file {0} with parser {1}!", filePath,
parserType.FullName));
}
// Parse file and get all entities
T ent = null;
try
{
IEnumerable <T> set = parser.Read <T>(templateCfg);
ent = set.FirstOrDefault();
}
finally
{
parser.Close();
}
return(ent);
}
/// <summary>
/// Load data object from file with specific configuration and template
/// </summary>
/// <param name="config">Configuration used to define behavior of data loading</param>
/// <returns></returns>
IEnumerable <T> IDataParser.Read <T>(TemplateConfigElement config)
{
// Go throw template and parse data from excel file
if (config.Collections == null || config.Collections.Count < 1)
{
throw new InvalidOperationException(
"No valid collection found in TemplateConfigElement for ExcelParser!");
}
// This method only handle one collection
CollectionConfigElement colCfg = config.Collections[0];
// Create enumerator for this type of entities
var parser = new ExcelEntityEnumerable <T>(_doc, colCfg);
return(parser);
}
/// <summary>
/// Write one object to file with specific configuration and template
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="config">Configuration used to define behavior of data writting</param>
/// <param name="obj"></param>
void IDataParser.Write <T>(TemplateConfigElement config, T obj)
{
// Go throw template and parse data from excel file
if (config.Collections == null || config.Collections.Count < 1)
{
throw new InvalidOperationException(
"No valid collection found in TemplateConfigElement for ExcelParser!");
}
// This method only handle one collection
CollectionConfigElement colCfg = config.Collections[0];
var writter = new ExcelEntityWriter <T>(_doc, colCfg);
writter.Write(obj);
_changed = true;
}
/// <summary>
/// Save data entity to file with specific template
/// </summary>
/// <typeparam name="T">Entity class</typeparam>
/// <param name="filePath">Path of file to be save to</param>
/// <param name="templateName">Name of template used to write data to file</param>
/// <param name="entity">Entity to be saved</param>
public void SaveOne <T>(String filePath, String templateName, T entity) where T : class
{
// Find parser
TemplateConfigElement templateCfg = _cfg.Templates[templateName];
if (templateCfg == null)
{
throw new ConfigurationErrorsException(String.Format("Template {0} not exist!", templateName));
}
var parserCfg = _cfg.Parsers[templateCfg.Parser] as ParserConfigElement;
if (parserCfg == null)
{
throw new ConfigurationErrorsException(String.Format("Parser {0} not configured!", templateCfg.Parser));
}
Type parserType = Type.GetType(parserCfg.Type);
if (parserType == null)
{
throw new ConfigurationErrorsException(String.Format("Parser {0} not exist!", parserCfg.Type));
}
// Create parser
var parser = parserType.Assembly.CreateInstance(parserType.FullName) as IDataParser;
if (parser == null)
{
throw new ConfigurationErrorsException(String.Format("Cannot create instance of parser {0}!",
parserType.FullName));
}
// Open file
if (!parser.Open(filePath, false))
{
throw new InvalidOperationException(String.Format("Cannot open file {0} with parser {1}!", filePath,
parserType.FullName));
}
// Parse file and get all entities
try
{
parser.Write(templateCfg, entity);
}
finally
{
parser.Close();
}
}
