public static OutputStream createStream(
FSRevisionNode revNode, FSTransactionRoot txnRoot, OutputStream dstStream, boolean compress)
throws SVNException {
if (revNode.getType() != SVNNodeKind.FILE) {
SVNErrorMessage err =
SVNErrorMessage.create(
SVNErrorCode.FS_NOT_FILE, "Attempted to set textual contents of a *non*-file node");
SVNErrorManager.error(err, SVNLogType.FSFS);
}
if (!revNode.getId().isTxn()) {
SVNErrorMessage err =
SVNErrorMessage.create(
SVNErrorCode.FS_NOT_MUTABLE,
"Attempted to set textual contents of an immutable node");
SVNErrorManager.error(err, SVNLogType.FSFS);
}
OutputStream targetOS = null;
InputStream sourceStream = null;
long offset = -1;
long deltaStart = -1;
FSWriteLock txnLock = null;
try {
txnLock = FSWriteLock.getWriteLockForTxn(txnRoot.getTxnID(), txnRoot.getOwner());
txnLock.lock();
File targetFile = txnRoot.getTransactionProtoRevFile();
offset = targetFile.length();
targetOS = SVNFileUtil.openFileForWriting(targetFile, true);
CountingOutputStream revWriter = new CountingOutputStream(targetOS, offset);
FSRepresentation baseRep = revNode.chooseDeltaBase(txnRoot.getOwner());
sourceStream =
FSInputStream.createDeltaStream(new SVNDeltaCombiner(), baseRep, txnRoot.getOwner());
String header;
if (baseRep != null) {
header =
FSRepresentation.REP_DELTA
+ " "
+ baseRep.getRevision()
+ " "
+ baseRep.getOffset()
+ " "
+ baseRep.getSize()
+ "\n";
} else {
header = FSRepresentation.REP_DELTA + "\n";
}
revWriter.write(header.getBytes("UTF-8"));
deltaStart = revWriter.getPosition();
if (dstStream instanceof FSOutputStream) {
FSOutputStream fsOS = (FSOutputStream) dstStream;
fsOS.reset(
revNode, revWriter, targetFile, sourceStream, deltaStart, 0, offset, txnRoot, txnLock);
return dstStream;
}
return new FSOutputStream(
revNode,
revWriter,
targetFile,
sourceStream,
deltaStart,
0,
offset,
txnRoot,
compress,
txnLock);
} catch (IOException ioe) {
SVNFileUtil.closeFile(targetOS);
SVNFileUtil.closeFile(sourceStream);
txnLock.unlock();
FSWriteLock.release(txnLock);
SVNErrorMessage err =
SVNErrorMessage.create(SVNErrorCode.IO_ERROR, ioe.getLocalizedMessage());
SVNErrorManager.error(err, ioe, SVNLogType.FSFS);
} catch (SVNException svne) {
if (txnLock != null) {
txnLock.unlock();
FSWriteLock.release(txnLock);
}
SVNFileUtil.closeFile(targetOS);
SVNFileUtil.closeFile(sourceStream);
throw svne;
}
return null;
}
