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https://issues.apache.org/jira/browse/PDFBOX-1512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14168707#comment-14168707
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Andreas Lehmkühler commented on PDFBOX-1512:
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AFAIU PDFBOX-2397 the issue isn't limited to applets but to signed jars as used
with java webstart as well. To answer your question, IMHO in such cases the
default value for "useCustomQuicksort" should be "true" to be sure that
everything works well.
> TextPositionComparator is not compatible with Java 7
> ----------------------------------------------------
>
> Key: PDFBOX-1512
> URL: https://issues.apache.org/jira/browse/PDFBOX-1512
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 1.7.1, 2.0.0
> Environment: Java 7
> Reporter: Benjamin Papez
> Assignee: Andreas Lehmkühler
> Fix For: 1.8.8, 2.0.0
>
> Attachments: FOP-2252.pdf, TextPositionComparator.java, Topo.pdf,
> Topo.txt, TopoContained.pdf, TopoContained.txt, TopoOverlap.pdf,
> TopoOverlap.txt, WFI_PDFParser_TextPostionComparator.txt,
> illustration-of-inconsistent-sorting.png, immo-kurier_arsenal_93x62.pdf,
> quicksort.patch
>
>
> The TextPostionCompartor causes the following exception running on Java 7:
> Unexpected RuntimeException from
> org.apache.tika.parser.ParserDecorator$1@9007fa2 Original cause: Comparison
> method violates its general contract!
> I think the problem is with this check:
> if ( yDifference < .1 ||
> (pos2YBottom >= pos1YTop && pos2YBottom <= pos1YBottom) ||
> (pos1YBottom >= pos2YTop && pos1YBottom <= pos2YBottom))
> as it violates the contract requirement:
> The implementor must also ensure that the relation is transitive:
> ((compare(x, y)>0) && (compare(y, z)>0)) implies compare(x, z)>0.
> Finally, the implementor must ensure that compare(x, y)==0 implies that
> sgn(compare(x, z))==sgn(compare(y, z)) for all z.
> Java 7 now is strict and throws exceptions when the contract is violated.
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