/// <summary>
/// Opens the specified file for reading.
/// </summary>
/// <param name="dataStorePath">The data store path specifying the file to open.</param>
/// <returns>An <see cref="ITextReader"/> representing the file opened.</returns>
public ITextReader ReadText( string dataStorePath )
{
try
{
if( dataStorePath.NullOrEmpty()
|| !DataStore.IsValidPath(dataStorePath) )
throw new ArgumentException("Invalid data store path!").StoreFileLine();
lock( this.syncLock )
{
var node = this.GetNodeAt(dataStorePath);
if( node.NullReference() )
throw new FileNotFoundException("File system entry not found!").StoreFileLine();
if( !(node is IDataStoreValue) )
throw new FileNotFoundException("File system entry is not a file!").StoreFileLine();
var textValue = node as IDataStoreTextValue;
if( textValue.NotNullReference() )
{
var reader = new StringReader();
reader.Set(textValue.Content);
return reader;
}
var binaryValue = node as IDataStoreBinaryValue;
if( binaryValue.NotNullReference() )
{
var ms = new MemoryStream(capacity: binaryValue.Content.Count);
ms.Write(binaryValue.Content.Array, binaryValue.Content.Offset, binaryValue.Content.Count);
ms.Position = 0;
return IOWrapper.ToTextReader(ms);
}
throw new Exception("Data store node value is neither text, nor binary based!").Store("nodeType", node.GetType());
}
}
catch( Exception ex )
{
ex.Store("dataStorePath", dataStorePath);
throw;
}
}