Can't Parse any PDF using IBM JDK
---------------------------------
Key: PDFBOX-504
URL: https://issues.apache.org/jira/browse/PDFBOX-504
Project: PDFBox
Issue Type: Bug
Components: Parsing
Affects Versions: 0.8.0-incubator
Environment: RedHat Linux IBM JDK
Reporter: Chris Bowditch
Priority: Critical
All PDF (that I have tried) fail to parse using IBM JDK 1.5 on RedHat Linux.
The error you receive is:
Exception in thread "main" java.io.IOException: Error: Expected an integer
type, actual='ãÃÃ'
at org.apache.pdfbox.pdfparser.BaseParser.readInt(BaseParser.java:1220)
at org.apache.pdfbox.pdfparser.PDFParser.parseObject(PDFParser.java:493)
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:172)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:736)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:704)
at org.apache.pdfbox.PDFReader.parseDocument(PDFReader.java:323)
at org.apache.pdfbox.PDFReader.openPDFFile(PDFReader.java:286)
at org.apache.pdfbox.PDFReader.main(PDFReader.java:271)
Although after debugging the actual error is hidden:
java.io.IOException: Error: Expected an integer type, actual='ãÏÓ'
at org.apache.pdfbox.pdfparser.BaseParser.readInt(BaseParser.java:1220)
at org.apache.pdfbox.pdfparser.PDFParser.parseObject(PDFParser.java:483)
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:172)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:736)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:704)
at org.apache.pdfbox.PDFReader.parseDocument(PDFReader.java:323)
at org.apache.pdfbox.PDFReader.openPDFFile(PDFReader.java:286)
at org.apache.pdfbox.PDFReader.main(PDFReader.java:271)
The characters shown in the hidden message occur at the start of most PDF Files
that I have checked:
%PDF-1.4
%âãÏÓ
6 0 obj
<</Filter /FlateDecode
/Length 489
>>
stream
Tracing the code I can see the problem is down to the skipToNextObject() method
in PDFParser class. This method is new since v0.7.4.
The code converts the array of 16 bytes to a String. The characters âãÏÓ are
read as negative numbers in both Sun and IBM JDKs but whilst on Sun the String
created from the byte array contains the characters on IBM JDK these characters
are missing from the String. So when you read back 16 characters the stream
offset is incorrect.
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