public void ExtractFile(CompressedFileRecord objRecord, Stream objOutputStream)
{
if (objRecord == null)
{
throw new ArgumentNullException("objRecord", "A valid non-null CompressedFileRecord is required.");
}
if (objOutputStream == null)
{
throw new ArgumentNullException("objOutputStream", "A valid non-null Stream is required.");
}
if (CompressedFileRecordManager.Exists(objRecord) == false)
{
throw new Exception("A record for '" + objRecord.RelativePath + "' could not be found.");
}
CompressedFileRecordState enuRecordState = CompressedFileRecordManager.GetRecordState(objRecord);
if (enuRecordState == CompressedFileRecordState.Deleted)
{
throw new Exception("A record for '" + objRecord.RelativePath + "' could not be found.");
}
ExtractFile(objRecord, enuRecordState, objOutputStream);
}
public byte[] ExtractFile(CompressedFileRecord objRecord)
{
if (objRecord == null)
{
throw new ArgumentNullException("objRecord", "A valid non-null CompressedFileRecord is required.");
}
if (CompressedFileRecordManager.Exists(objRecord) == false)
{
throw new Exception("A record for '" + objRecord.RelativePath + "' could not be found.");
}
CompressedFileRecordState enuRecordState = CompressedFileRecordManager.GetRecordState(objRecord);
if (enuRecordState == CompressedFileRecordState.Deleted)
{
throw new Exception("A record for '" + objRecord.RelativePath + "' could not be found.");
}
using (MemoryStream objMemoryStream = new MemoryStream())
{
ExtractFile(objRecord, enuRecordState, objMemoryStream);
objMemoryStream.Position = 0;
return(objMemoryStream.ToArray());
}
}
public CompressedFileRecord[] GetRecordsByState(CompressedFileRecordState enuState)
{
List <CompressedFileRecord> objRecords = new List <CompressedFileRecord>();
foreach (KeyValuePair <CompressedFileRecord, CompressedFileRecordState> objKeyValuePair in SortedRecords)
{
if ((enuState & objKeyValuePair.Value) == objKeyValuePair.Value)
{
objRecords.Add(objKeyValuePair.Key);
}
}
return(objRecords.ToArray());
}
private void ExtractFile(CompressedFileRecord objRecord, CompressedFileRecordState enuRecordState, Stream objTargetStream)
{
if (enuRecordState == CompressedFileRecordState.Inserted)
{
using (FileStream objDiskFileStream = new FileStream(objRecord.OriginalFilePath, FileMode.Open, FileAccess.Read))
{
CompressionManager.CopyToStream(objDiskFileStream, objTargetStream);
}
}
else
{
int intFileStartIndex = CompressedFileRecordManager.FindFileStartIndex(objRecord);
if (intFileStartIndex == -1)
{
throw new FileNotFoundException("Unable to locate '" + objRecord.RelativeFilePath + "' within package.");
}
CompressedStream.Position = intFileStartIndex;
CompressionManager.Decompress(CompressedStream, objTargetStream, objRecord.Size);
}
}
public FileInfo ExtractFile(CompressedFileRecord objRecord, string strPath)
{
if (objRecord == null)
{
throw new ArgumentNullException("objRecord", "A valid non-null CompressedFileRecord is required.");
}
if (strPath == null)
{
throw new ArgumentNullException("strPath", "A valid non-null string is required.");
}
if (CompressedFileRecordManager.Exists(objRecord) == false)
{
throw new Exception("A record for '" + objRecord.RelativePath + "' could not be found.");
}
CompressedFileRecordState enuRecordState = CompressedFileRecordManager.GetRecordState(objRecord);
if (enuRecordState == CompressedFileRecordState.Deleted)
{
throw new Exception("A record for '" + objRecord.RelativePath + "' could not be found.");
}
string strFilePath = Path.Combine(strPath, objRecord.RelativeFilePath);
string strDirectoryPath = Path.GetDirectoryName(strFilePath);
if (Directory.Exists(strDirectoryPath) == false)
{
Directory.CreateDirectory(strDirectoryPath);
}
using (FileStream objFileStream = new FileStream(strFilePath, FileMode.Create, FileAccess.Write))
{
ExtractFile(objRecord, enuRecordState, objFileStream);
}
FileInfo objFileInfo = new FileInfo(strFilePath);
return(objFileInfo);
}
public CompressedFileRecordManager(int intFileDataStartingIndex, IEnumerable <CompressedFileRecord> objRecords, CompressedFileRecordState enuInitialState)
{
FileDataStartingIndex = intFileDataStartingIndex;
SortedRecords = new Dictionary <CompressedFileRecord, CompressedFileRecordState>();
foreach (CompressedFileRecord objRecord in objRecords)
{
SortedRecords.Add(objRecord, enuInitialState);
}
}
