I am using the new App Engine file api to read in a file from the
blobstore and parse things out from specific lines. Can someone tell
me how I could jump to a specific line in the file without having to
iterate over every line until I find the line number I need?
Here is how I am currently doing it:
AppEngineFile file = null;
FileService fs = FileServiceFactory.getFileService();
file = fs.getBlobFile(new BlobKey(blobKeyString));
FileReadChannel readChannel = fs.openReadChannel(file,
false);
BufferedReader reader = new
BufferedReader(Channels.newReader(readChannel, "UTF8"));
String line = null;
int linePosition = lineNumber;
while((line = reader.readLine()) != null){
if ((linePosition >= lineNumber) &&
(linePosition < lineNumber +
LINECOUNT)) {
//do stuff with line here
}
else if(linePosition == lineNumber + LINECOUNT)
break;
linePosition++;
}
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