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https://issues.apache.org/jira/browse/PDFBOX-385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Lehmkühler updated PDFBOX-385:
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Attachment: BaseParser_385-Patch.diff
As already mentioned in a former comment the pdf-document isn't welformed. The
object reference is broken.
I made a patch to prevent a NPE in those cases.
> ClassCastException when call parseCOSArray in BaseParser.java
> --------------------------------------------------------------
>
> Key: PDFBOX-385
> URL: https://issues.apache.org/jira/browse/PDFBOX-385
> Project: PDFBox
> Issue Type: Bug
> Components: FontBox
> Affects Versions: 0.7.0, 0.7.1, 0.7.2, 0.7.3
> Environment: Window XP professional sp2, liferay 3.3.0 Enterprise +
> Jboss 402
> Reporter: Yubin Zheng
> Attachments: BaseParser_385-Patch.diff, Test9.pdf
>
>
> When parse spefical PDF document, PDF will throw ClassCaseException, then
> Lucene integrated in Liferay will can not get text by parse PDF to add the
> index.
> Debug the issue, the method "parseCOSArray" at BaseParser.java see the
> caused by it:
> COSArray po = new COSArray();
> COSBase pbo = null;
> skipSpaces();
> int i = 0;
> while( ((i = pdfSource.peek()) > 0) && ((char)i != ']') )
> {
> pbo = parseDirObject();
> if( pbo instanceof COSObject )
> {
> COSInteger genNumber = (COSInteger)po.remove( po.size() -1 );
> COSInteger number = (COSInteger)po.remove( po.size() -1 );
> COSObjectKey key = new COSObjectKey(number.intValue(),
> genNumber.intValue());
> pbo = document.getObjectFromPool(key);
> }
> if( pbo != null )
> {
> po.add( pbo );
> }
> else
> {
> //it could be a bad object in the array which is just skipped
> }
> skipSpaces();
> }
> pdfSource.read(); //read ']'
> skipSpaces();
> return po;
> }
> If meet the specific PDF document, the statment COSInteger number =
> (COSInteger)po.remove( po.size() -1 ); will raise error, it means the object
> is COSObject, not COSInteger. so Cast Class fail.
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