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https://issues.apache.org/jira/browse/PDFBOX-2275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14102405#comment-14102405
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Tilman Hausherr edited comment on PDFBOX-2275 at 8/19/14 4:22 PM:
------------------------------------------------------------------
[~dnt] please change the code segment in PDResources to this and test your
application:
{code}
try
{
String name = objName.getName();
COSBase item = dict.getItem(objName);
if (item instanceof COSObject)
{
COSObject cosObject = (COSObject) item;
// add the object number to create an unique identifier
name += "#" + cosObject.getObjectNumber().intValue();
xobject = PDXObject.createXObject(cosObject.getObject(), name, this);
}
else
if (item instanceof COSBase)
{
xobject = PDXObject.createXObject(item, name, this);
}
}
{code}
I think the problem is that you're calling the method at a time where the
objects are already prepared (but not the xobjects map), while the original
intent was to use it at a time the objects were known only by their reference
number (look into a PDF with an editor to see what I mean). My change takes
care of this difference.
[~lehmi] WDYT? Patch proposal attached.
was (Author: tilman):
[~dnt] please change the code segment to this and test your application:
{code}
try
{
String name = objName.getName();
COSBase item = dict.getItem(objName);
if (item instanceof COSObject)
{
COSObject cosObject = (COSObject) item;
// add the object number to create an unique identifier
name += "#" + cosObject.getObjectNumber().intValue();
xobject = PDXObject.createXObject(cosObject.getObject(), name, this);
}
else
if (item instanceof COSBase)
{
xobject = PDXObject.createXObject(item, name, this);
}
}
{code}
I think the problem is that you're calling the method at a time where the
objects are already prepared (but not the xobjects map), while the original
intent was to use it at a time the objects were known only by their reference
number (look into a PDF with an editor to see what I mean). My change takes
care of this difference.
[~lehmi] WDYT? Patch proposal attached.
> ClassCastException in PDResources
> ---------------------------------
>
> Key: PDFBOX-2275
> URL: https://issues.apache.org/jira/browse/PDFBOX-2275
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Dominic Tubach
> Attachments: PDResources.diff
>
>
> The code (added in revision 1606860)
> {code}
> COSObject cosObject = (COSObject)dict.getItem(objName);
> {code} in the method getXObjects() in PDResources fails with a
> ClassCastException:
> bq. org.apache.pdfbox.cos.COSStream cannot be cast to
> org.apache.pdfbox.cos.COSObject
> The document issuing this exception is created using the following code:
> {code}
> PDDocument doc = new PDDocument();
> PDPage page = new PDPage();
> doc.addPage(page);
> PDImageXObject image = JPEGFactory.createFromStream(doc, imageStream);
> try (PDPageContentStream contentStream = new PDPageContentStream(doc, page,
> false, false)) {
> contentStream.drawImage(image, 20, 20);
> }
> {code}
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