http://itext.svn.sourceforge.net/viewvc/itext/trunk/src/core/com/itextpd
f/text/pdf/DocumentFont.java?revision=4515&view=markup
> java.lang.NullPointerException
> at
com.itextpdf.text.pdf.DocumentFont.<init>(DocumentFont.java:114)
108 DocumentFont(PRIndirectReference refFont) {
109 encoding = "";
110 fontSpecific = false;
111 this.refFont = refFont;
112 fontType = FONT_TYPE_DOCUMENT;
113 font = (PdfDictionary)PdfReader.getPdfObject(refFont);
114 PdfName baseFont = font.getAsName(PdfName.BASEFONT); <-- boom.
That means PdfReader.getPdfObject(refFont) returned null. Having a look
over there...
http://itext.svn.sourceforge.net/viewvc/itext/trunk/src/core/com/itextpd
f/text/pdf/PdfReader.java?revision=4507&view=markup
(lines 812 - 846, I'll let you look it up)
If refFont == null, you get a null, and if if
ref.getReader().getPdfObject(ref.getNumber) returns null, you get null
(but that Should Not Happen).
So someone passed in null. Which leads us up the call stack:
> at
com.itextpdf.text.pdf.CMapAwareDocumentFont.<init>(CMapAwareDocumentFont
.java:79)
78 public CMapAwareDocumentFont(PRIndirectReference refFont) {
79 super(refFont);
(I'll let you figure out the links too. Start at
http://itext.svn.sourceforge.net/viewvc/itext/trunk/src/core/com/itextpd
f/text/pdf/ and work your way down from there).
Again, looks like someone passed in a null to the constructor.
> at
>
com.itextpdf.text.pdf.parser.PdfContentStreamProcessor$SetTextFont.invok
e(
> PdfContentStreamProcessor.java:591)
(and I had to look at a previous revision of the file to get the line
numbers to make sense:
http://itext.svn.sourceforge.net/viewvc/itext/trunk/src/core/com/itextpd
f/text/pdf/parser/PdfContentStreamProcessor.java?revision=4410&view=mark
up)
585 private static class SetTextFont implements ContentOperator{
586 public void invoke(PdfContentStreamProcessor processor,
PdfLiteral operator, ArrayList<PdfObject> operands) {
587 PdfName fontResourceName = (PdfName)operands.get(0);
588 float size = ((PdfNumber)operands.get(1)).floatValue();
589
590 PdfDictionary fontsDictionary =
processor.resources.getAsDict(PdfName.FONT);
591 CMapAwareDocumentFont font = new
CMapAwareDocumentFont((PRIndirectReference)fontsDictionary.get(fontResou
rceName));
So fontsDictionary.get(fontResourceName) (in all probability) returned a
null. Smells like a Bad PDF to me. May we see it?
And hopefully folks will learn something from this
byte-array-output-stream-of-consciousness debug session. In particular:
1) Use the Source, Luke. Reach out with your browser.
2) iText's source is available on the web at
http://itext.svn.sourceforge.net/viewvc/itext/trunk/...
2.1) But adding the source to your classpath in Eclipse et al is better
while you're debugging. Stepping into the code will TELL YOU whether
something is null or not, instead of making an educated guess as I have
here.
--Mark Storer
Senior Software Engineer
Cardiff.com
import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;
> -----Original Message-----
> From: Ben Short [mailto:b...@benshort.co.uk]
> Sent: Tuesday, June 15, 2010 1:36 PM
> To: itext-questions@lists.sourceforge.net
> Subject: [iText-questions] NPE while Extracting text
>
> Hi,
>
> I'm trying to use iText 5.0.2 to extract the text from a pdf file
> using the following code...
>
> PdfReader reader = new PdfReader("C:/development/May.pdf");
> PdfReaderContentParser parser = new
> PdfReaderContentParser(reader);
> PrintWriter out = new PrintWriter(System.out);
> TextExtractionStrategy strategy;
> for (int i = 1; i <= reader.getNumberOfPages(); i++) {
> strategy = parser.processContent(i, new
> SimpleTextExtractionStrategy());
> out.println(strategy.getResultantText());
> }
>
> When I run this code I get the following exception.
>
> java.lang.NullPointerException
> at
com.itextpdf.text.pdf.DocumentFont.<init>(DocumentFont.java:114)
> at
>
com.itextpdf.text.pdf.CMapAwareDocumentFont.<init>(CMapAwareDocumentFont
.j
> ava:79)
> at
>
com.itextpdf.text.pdf.parser.PdfContentStreamProcessor$SetTextFont.invok
e(
> PdfContentStreamProcessor.java:591)
> at
>
com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.invokeOperator(Pd
fC
> ontentStreamProcessor.java:226)
> at
>
com.itextpdf.text.pdf.parser.PdfContentStreamProcessor.processContent(Pd
fC
> ontentStreamProcessor.java:380)
> at
>
com.itextpdf.text.pdf.parser.PdfReaderContentParser.processContent(PdfRe
ad
> erContentParser.java:41)
>
> I believe that this is something todo with the font not being
available?
>
> I have used www.identifont.com and think that the font is Heldustry.
> Should this not be available on my machine if acrobat reader can read
> the file?
>
> Can anyone give me a some help making this text extraction work?
>
> Kind Regards
>
> Ben Short
>
>
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> Buy the iText book: http://www.itextpdf.com/book/
> Check the site with examples before you ask questions:
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>
>
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------------------------------------------------------------------------------
ThinkGeek and WIRED's GeekDad team up for the Ultimate
GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
lucky parental unit. See the prize list and enter to win:
http://p.sf.net/sfu/thinkgeek-promo
_______________________________________________
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Check the site with examples before you ask questions:
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