/// <summary>
/// Opens an existing file, or creates a new one, for both reading and writing.
/// </summary>
/// <param name="dataStorePath">The data store path specifying the file to open.</param>
/// <returns>An <see cref="IBinaryStream"/> representing the file opened.</returns>
public IBinaryStream ReadWriteBinary( string dataStorePath )
{
try
{
if( dataStorePath.NullOrEmpty()
|| !DataStore.IsValidPath(dataStorePath) )
throw new ArgumentException("Invalid data store path!").StoreFileLine();
lock( this.syncLock )
{
// create parent
var parentNodes = this.GetOrCreateParentNodes(dataStorePath);
// get node
var nodeName = DataStore.GetNodeName(dataStorePath);
var node = parentNodes.FirstOrDefault(n => DataStore.Comparer.Equals(n.Name, nodeName));
if( node.NotNullReference() && !(node is IDataStoreValue) )
throw new FileNotFoundException("File system entry is not a file!").StoreFileLine();
// convert text to binary node
var textValue = node as IDataStoreTextValue;
if( textValue.NotNullReference() )
{
var str = textValue.Content.ToString();
var bytes = DataStore.DefaultEncoding.GetBytes(str);
var value = new DataStoreBinaryValue(DataStore.GetNodeName(dataStorePath), bytes);
this.SetValueForExistingParent(parentNodes, value);
node = value;
}
var binaryValue = node as IDataStoreBinaryValue;
if( binaryValue.NullReference() )
{
binaryValue = new DataStoreBinaryValue(DataStore.GetNodeName(dataStorePath));
this.SetValueForExistingParent(parentNodes, binaryValue);
}
return new DataStoreBinaryValueStream(binaryValue);
}
}
catch( Exception ex )
{
ex.Store("dataStorePath", dataStorePath);
throw;
}
}
/// <summary>
/// Releases any resources held by an open writer.
/// </summary>
/// <param name="writer">The writer of the value.</param>
protected override void CloseWriter( IBinaryWriter writer )
{
var valueNode = new DataStoreBinaryValue(this.currentValueNodeName, this.memoryStream.ToArray());
this.memoryStream.SetLength(0);
this.AddChild(valueNode);
}
/// <summary>
/// Creates a new empty file, and opens it for writing.
/// </summary>
/// <param name="dataStorePath">The data store path specifying the file to open.</param>
/// <param name="overwriteIfExists"><c>true</c> to overwrite the file in case it already exists (like <see cref="System.IO.FileMode.Create"/>); or <c>false</c> to throw an exception (like <see cref="System.IO.FileMode.CreateNew"/>).</param>
/// <returns>An <see cref="IBinaryWriter"/> representing the file opened.</returns>
public IBinaryWriter CreateNewBinary( string dataStorePath, bool overwriteIfExists )
{
try
{
if( dataStorePath.NullOrEmpty()
|| !DataStore.IsValidPath(dataStorePath) )
throw new ArgumentException("Invalid data store path!").StoreFileLine();
lock( this.syncLock )
{
// create parent
var parentNodes = this.GetOrCreateParentNodes(dataStorePath);
// get or create value
var binaryValue = this.GetNodeAt(dataStorePath) as IDataStoreBinaryValue;
if( binaryValue.NullReference() )
{
binaryValue = new DataStoreBinaryValue(DataStore.GetNodeName(dataStorePath));
this.SetValueForExistingParent(parentNodes, binaryValue);
}
return new DataStoreBinaryValueWriter(binaryValue);
}
}
catch( Exception ex )
{
ex.Store("dataStorePath", dataStorePath);
ex.Store("overwriteIfExists", overwriteIfExists);
throw;
}
}
