/// <summary>
/// Get all parts containing this table
/// Could be multiple parts, since the table may be spread across multiples files
/// </summary>
public IEnumerable <DmTable> GetTable(string tableName)
{
foreach (var batchPartinInfo in this.BatchPartsInfo)
{
bool isSerialized = false;
if (batchPartinInfo.Tables.Contains(tableName))
{
// Batch not readed, so we deserialized the batch and get the table
if (batchPartinInfo.Set == null)
{
// Set is not already deserialized so we try to get the batch
BatchPart batchPart = batchPartinInfo.GetBatch();
// Unserialized and set in memory the DmSet
batchPartinInfo.Set = batchPart.DmSetSurrogate.ConvertToDmSet();
isSerialized = true;
}
// return the table
if (batchPartinInfo.Set.Tables.Contains(tableName))
{
yield return(batchPartinInfo.Set.Tables[tableName]);
if (isSerialized)
{
batchPartinInfo.Set.Clear();
batchPartinInfo.Set = null;
}
}
}
}
}
/// <summary>
/// Create a new BPI, and serialize the changeset if not in memory
/// </summary>
internal static BatchPartInfo CreateBatchPartInfo(int batchIndex, DmSet changesSet, string fileName, Boolean isLastBatch, Boolean inMemory)
{
BatchPartInfo bpi = null;
// Create a batch part
// The batch part creation process will serialize the changesSet to the disk
if (!inMemory)
{
// Serialize the file !
BatchPart.Serialize(new DmSetSurrogate(changesSet), fileName);
bpi = new BatchPartInfo {
FileName = fileName
};
}
else
{
bpi = new BatchPartInfo {
Set = changesSet
};
}
bpi.Index = batchIndex;
bpi.IsLastBatch = isLastBatch;
// Even if the set is empty (serialized on disk), we should retain the tables names
bpi.Tables = changesSet.Tables.Select(t => t.TableName).ToArray();
return(bpi);
}
/// <summary>
/// Delete the DmSet surrogate affiliated with the BatchPart, if exists.
/// </summary>
public void Clear()
{
if (this.batch != null)
{
this.batch.Clear();
this.batch = null;
}
if (this.Set != null)
{
this.Set.Clear();
this.Set = null;
}
}
/// <summary>
/// Gets or sets the batch file included in this batch part
/// </summary>
public BatchPart GetBatch()
{
if (batch != null)
{
return(batch);
}
if (String.IsNullOrEmpty(this.FileName))
{
throw new ArgumentException("Cant get a batchpart if filename is null");
}
// Get a Batch part, and deserialise the file into a DmSetSurrogate
batch = BatchPart.Deserialize(this.FileName);
return(batch);
}
public static BatchPart Deserialize(string fileName)
{
if (String.IsNullOrEmpty(fileName))
{
throw new ArgumentException("Cant get a Batch part if fileName doesn't exist");
}
if (!File.Exists(fileName))
{
throw new ArgumentException($"file {fileName} doesn't exist");
}
BatchPart bp = new BatchPart();
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
BinaryFormatter serializer = new BinaryFormatter();
bp.DmSetSurrogate = serializer.Deserialize(fs) as DmSetSurrogate;
}
return(bp);
}