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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (JIRA)" <ji...@apache.org> on 2015/06/22 19:48:02 UTC
[jira] [Commented] (PDFBOX-2834) Violation in
PDOutputIntent.getDestOutputProfile() method
[ https://issues.apache.org/jira/browse/PDFBOX-2834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14596319#comment-14596319 ]
Tilman Hausherr commented on PDFBOX-2834:
-----------------------------------------
I think this is a one line change, i.e. use getDictionaryObject instead of getItem.
> Violation in PDOutputIntent.getDestOutputProfile() method
> ---------------------------------------------------------
>
> Key: PDFBOX-2834
> URL: https://issues.apache.org/jira/browse/PDFBOX-2834
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Environment: Windows 7, jdk 1.7.0_51
> Reporter: Evgeniy Muravitskiy
> Assignee: Andreas Lehmkühler
> Fix For: 2.0.0
>
> Attachments: OutputIntentTest.pdf
>
>
> Inside this method an Object (the result of dictionary.getItem(COSName.DEST_OUTPUT_PROFILE) method call) is casted to COSStream, but it can be also a COSObject containing COSStream which leads to class cast exception.
> {code}
> public COSStream getDestOutputIntent()
> {
> return (COSStream) dictionary.getItem(COSName.DEST_OUTPUT_PROFILE);
> }
> {code}
> Possible solutions :
> 1) Check class instance and handle them in proper way*
> 2) Usage of visitor pattern
> *{code}
> public COSStream getDestOutputIntent()
> {
> final COSBase item = dictionary.getItem(COSName.DEST_OUTPUT_PROFILE);
> return getDestOutputIntent(item);
> }
> private COSStream getDestOutputIntent(COSBase object) {
> if (object instanceof COSStream) {
> return (COSStream) object;
> } else if (object instanceof COSObject) {
> return getDestOutputIntent(((COSObject) object).getObject());
> } else {
> return null;
> }
> }
> {code}
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