I don't see anything which jumps out at me here other than you're closing
the document in 3 places where it's not needed (although that won't hurt
anything). Your outer try seems unnecessary, and I can't see what
isFailedFile would be set to when this code is called (or even where it is
defined for that matter). The "finally" should always close the file
(which means it'll always already be closed by the time you get to the
catch statement, return statement, or at the end of the function). Your
debug statements look like the way to go in order to track this one down.
Also, your regex would be simplier if you use the "case insensitive"flag.
IIRC, it's used in Pattern.comple and is something like
Pattern.CASE_INSENSITIVE, but you'll have to hit the docs to verify.
--Adam
Sophia Cheng <sophia.ch...@gmail.com>
09/29/2009 06:59
Please respond to
pdfbox-users@incubator.apache.org
To
pdfbox-users@incubator.apache.org
cc
Subject
Extracting text from a large (112) list of pdf files
Hello,
I'm using pdfbox to go through a list of pdfs and attempt to extract a
phrase out of the files. Thus far, everything has been working great
until I scaled it up to use a large list of files. I am running into a
problem when there is a list of 112 files. After successfully going
through a handful of them (maybe 20), subsequent files are not able to
be opened. I have tried using the same method on just the offending
files one at a time, and they are able to be opened.
Here is the method that is being problematic, which is called for each pdf
file:
PDDocument doc = null;
String regExDoi = "[Dd][Oo][Ii]:[0-9\\s]*\\.[\\
n\\r0-9]*/[A-Za-z0-9\\.\\-;\\(\\)/]*";
String regExDoiSplit = "[Dd][Oo][Ii]:";
Pattern findDoiString = Pattern.compile(regExDoi);
try {
try {
doc = PDDocument.load(file);
System.out.println("======= "+file.getName()+" loaded
========");
decrypt(doc);
if (!isFailedFile) {
PDFTextStripper strip = new PDFTextStripper();
int pageCount = doc.getNumberOfPages();
System.out.println("Pages: "+pageCount);
for (int page = 1; page < pageCount; page++) {
// restrict pdftextstripper to current page
strip.setStartPage(page);
strip.setEndPage(page);
// get text on page
String text = strip.getText(doc);
// try to find the doi string
Matcher m = findDoiString.matcher(text);
if (m.find()) {
String foundGroup = m.group();
String foundIt[] =
foundGroup.split(regExDoiSplit);
// split at regexDoiSplit, should be
String[] = {"", "the doi numbers"}
if (foundIt.length > 0) {
System.out.println("\tDOI:
'"+foundIt[1]+"'");
if (doc != null) {
System.out.println("Closing
document, found doi.");
doc.close();
}
// return the doi numbers, stripping
any white space
return foundIt[1].replaceAll("[\\s]*",
"");
}
}
}
} else System.out.println(isFailedFile +
failedReason.toString());
} finally {
if (doc != null) {
doc.close();
}
}
} catch (IOException e) {
isFailedFile = true;
failedReason = FailedReason.BADFILE;
if (doc != null) {
doc.close();
}
}
if (doc != null) {
doc.close();
System.out.println("close it again");
}
return null
}
I think the problem is arising because I keep getting a "warning, you
did not close the pdf" and in such a long list, after getting that
warning so many times, it won't open the files anymore. I thought I
closed the document at all points that needed to be closed, did I
forget something else? Thank you.
-Sophia
--
~~~~~~~~~~~~~~~~~~~~~~~~~
Aim for the moon. If you miss, you may hit a star. -W. Clement Stone
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