private NativeBlockStream GetStream(int idx, FileAccess access)
{
DryadLinqFileBlockStream fileStream = null;
string[] pathAlternatives = this.m_srcList[idx];
for (int i = 0; i < pathAlternatives.Length; i++)
{
bool bLastIter = (i == pathAlternatives.Length - 1);
string curSrcPath = pathAlternatives[i];
try
{
fileStream = new DryadLinqFileBlockStream(curSrcPath, access, this.m_compressionScheme);
}
catch (Exception e)
{
// if we have more path alternatives to try we will continue,
// otherwise we'll propagate the exception from this last attempt
if (bLastIter)
{
// if we caught the DryadLinqException thrown by DryadLinqFileStream.Initialize,
// we want to propagate its inner exception (which contains the actual IO error)
// otherwise we'll attach the exception we caught as is
Exception innerException = (e is DryadLinqException) ? e.InnerException : e;
throw new DryadLinqException(DryadLinqErrorCode.MultiBlockCannotAccesFilePath,
String.Format(SR.MultiBlockCannotAccesFilePath,
curSrcPath, m_associatedDscStreamName),
innerException);
}
}
// if the attempt to initialize an DryadLinqFileStream with this path succeeded we'll return the object
if (fileStream != null)
{
break;
}
}
return(fileStream);
}
private NativeBlockStream GetStream(int idx, FileAccess access)
{
DryadLinqFileBlockStream fileStream = null;
string[] pathAlternatives = this.m_srcList[idx];
for (int i = 0; i < pathAlternatives.Length; i++)
{
bool bLastIter = (i == pathAlternatives.Length - 1);
string curSrcPath = pathAlternatives[i];
try
{
fileStream = new DryadLinqFileBlockStream(curSrcPath, access, this.m_compressionScheme);
}
catch(Exception e)
{
// if we have more path alternatives to try we will continue,
// otherwise we'll propagate the exception from this last attempt
if (bLastIter)
{
// if we caught the DryadLinqException thrown by DryadLinqFileStream.Initialize,
// we want to propagate its inner exception (which contains the actual IO error)
// otherwise we'll attach the exception we caught as is
Exception innerException = (e is DryadLinqException) ? e.InnerException : e;
throw new DryadLinqException(DryadLinqErrorCode.MultiBlockCannotAccesFilePath,
String.Format(SR.MultiBlockCannotAccesFilePath,
curSrcPath, m_associatedDscStreamName),
innerException);
}
}
// if the attempt to initialize an DryadLinqFileStream with this path succeeded we'll return the object
if (fileStream != null) break;
}
return fileStream;
}