protected override void OnBlockAppended(DataFileBlockBase block)
{
/* TODO: maybe remove
* // Make sure only one block is added
* if (Blocks.Count > 1)
* {
* throw new InvalidOperationException("Text files must consist of a single block.");
* }*/
}
/// <summary>
/// Initializes writing the next block.
/// </summary>
/// <param name="block"></param>
/// <param name="dr"></param>
/// <returns></returns>
/// If next block
protected override DataFileBlockBase OnWriteNextBlock(DataFileBlockBase block, IDataReader dr)
{
if (!isFirstBlock)
{
throw new InvalidOperationException();
// CSV files can contain a single file block only
}
return(block ?? new DelimitedTextDataFileBlock(this));
}
private void CopyMembers(DataFileBlockBase old)
{
this.file = old.file;
// Deep copy columns
this.columns = new List <Column>();
foreach (var c in old.columns)
{
this.columns.Add((Column)c.Clone());
}
}
/// <summary>
/// Advanced the file to the next block.
/// </summary>
/// <param name="block"></param>
/// <returns></returns>
protected override DataFileBlockBase OnReadNextBlock(DataFileBlockBase block)
{
// Only allow calling this function once
if (!isFirstBlock)
{
return(null);
}
isFirstBlock = false;
// Create a new block object, if necessary
return(block ?? new DelimitedTextDataFileBlock(this));
}
/// <summary>
/// Appends a new block to a file.
/// </summary>
/// <param name="block"></param>
/// <remarks>
/// File block are either created automatically during read, or appended
/// manually before reading or when writing.
/// </remarks>
public void AppendBlock(DataFileBlockBase block)
{
switch (fileMode)
{
case DataFileMode.Read:
// For read, blocks can be added to predefine columns, but otherwise
// no need to do anything, just write them to the end of the list
blocks.Add(block);
OnBlockAppended(block);
break;
default:
throw new NotImplementedException();
}
}
/// <summary> /// When overriden in a derived class, writes the next file block. /// </summary> /// <param name="block"></param> /// <param name="dr"></param> /// <returns></returns> protected abstract DataFileBlockBase OnWriteNextBlock(DataFileBlockBase block, IDataReader dr);
/// <summary> /// When overloaded in a derived class, reads the next block. /// </summary> /// <returns></returns> protected abstract DataFileBlockBase OnReadNextBlock(DataFileBlockBase block);
/// <summary> /// Called by the library after a new block has been appended to the file. /// </summary> /// <param name="block"></param> protected abstract void OnBlockAppended(DataFileBlockBase block);
/// <summary>
/// Appends a new block to a file.
/// </summary>
/// <param name="block"></param>
/// <remarks>
/// File block are either created automatically during read, or appended
/// manually before reading or when writing.
/// </remarks>
public void AppendBlock(DataFileBlockBase block)
{
switch (fileMode)
{
case DataFileMode.Read:
// For read, blocks can be added to predefine columns, but otherwise
// no need to do anything, just write them to the end of the list
blocks.Add(block);
OnBlockAppended(block);
break;
default:
throw new NotImplementedException();
}
}
/// <summary> /// When overriden in a derived class, writes the next file block. /// </summary> /// <param name="block"></param> /// <param name="dr"></param> /// <returns></returns> protected abstract DataFileBlockBase OnWriteNextBlock(DataFileBlockBase block, IDataReader dr);
protected override DataFileBlockBase OnReadNextBlock(DataFileBlockBase block)
{
return block ?? new SqlServerNativeDataFileBlock(this);
}
/// <summary>
/// Initializes writing the next block.
/// </summary>
/// <param name="block"></param>
/// <param name="dr"></param>
/// <returns></returns>
/// If next block
protected override DataFileBlockBase OnWriteNextBlock(DataFileBlockBase block, IDataReader dr)
{
if (!isFirstBlock)
{
throw new InvalidOperationException();
// CSV files can contain a single file block only
}
return block ?? new DelimitedTextDataFileBlock(this);
}
private void CopyMembers(DataFileBlockBase old)
{
this.file = old.file;
// Deep copy columns
this.columns = new List<Column>();
foreach (var c in old.columns)
{
this.columns.Add((Column)c.Clone());
}
}
protected override void OnBlockAppended(DataFileBlockBase block)
{
// Do nothing
}
protected override void OnBlockAppended(DataFileBlockBase block)
{
// Do nothing
}
protected override DataFileBlockBase OnWriteNextBlock(DataFileBlockBase block, System.Data.IDataReader dr)
{
return(block ?? new SqlServerNativeDataFileBlock(this));
}
protected override DataFileBlockBase OnReadNextBlock(DataFileBlockBase block)
{
return(block ?? new SqlServerNativeDataFileBlock(this));
}
protected override void OnBlockAppended(DataFileBlockBase block)
{
// Make sure only one block is added
if (Blocks.Count > 1)
{
throw new InvalidOperationException("Text files must consist of a single block.");
}
}
/// <summary> /// Called by the library after a new block has been appended to the file. /// </summary> /// <param name="block"></param> protected abstract void OnBlockAppended(DataFileBlockBase block);
/// <summary>
/// Advanced the file to the next block.
/// </summary>
/// <param name="block"></param>
/// <returns></returns>
protected override DataFileBlockBase OnReadNextBlock(DataFileBlockBase block)
{
// Only allow calling this function once
if (!isFirstBlock)
{
return null;
}
isFirstBlock = false;
// Create a new block object, if necessary
return block ?? new DelimitedTextDataFileBlock(this);
}
private void CopyMembers(DataFileBlockBase old)
{
this.file = old.file;
this.columns = new List<DataFileColumn>(old.columns);
}
public DataFileBlockBase(DataFileBlockBase old)
{
CopyMembers(old);
}
public DataFileBlockBase(DataFileBlockBase old)
{
CopyMembers(old);
}
protected override DataFileBlockBase OnWriteNextBlock(DataFileBlockBase block, System.Data.IDataReader dr)
{
return block ?? new SqlServerNativeDataFileBlock(this);
}
/// <summary> /// When overloaded in a derived class, reads the next block. /// </summary> /// <returns></returns> protected abstract DataFileBlockBase OnReadNextBlock(DataFileBlockBase block);
