How to remove a specific image from PDF?

[Alexander Teut]

I need to remove a specific image from PDF file according its
metadata. Sadly. all examples I can find in Internet are using
discarded methods.

I draw this image with contentStream.drawImage() method and mark it
with a metadata. I needto allow my soft to remove added images as
well/


I'm using the following code:

List<COSName> itemsToRemove = new ArrayList<>();

COSDictionary imagesContainer =
(COSDictionary)resources.getCOSObject().getDictionaryObject(COSName.XOBJECT);

try (PDDocument doc = PDDocument.load(new ByteArrayInputStream(pdf))) {
doc.getPages().forEach(page ->
    {
        PDResources resources = page.getResources();
        List<COSName> itemsToRemove = new ArrayList<>();

        resources.getXObjectNames().forEach(propertyName -> {
            if(!resources.isImageXObject(propertyName)) {
                return;
            }
            PDXObject pdxObject = resources.getXObject(propertyName);
            PDImageXObject pdImageXObject = (PDImageXObject)pdxObject;
            PDMetadata metadata = pdImageXObject.getMetadata();
            if(checkMetadata(metadata)){

               itemsToRemove.add(propertyName);

                // What should I use here?
            }
        });

        itemsToRemove.forEach(imagesContainer::removeItem);
     });
    doc.save(baos);
} catch (Exception e) {
    //Code here

}

It produces a cleared PDF that shows an error when I open it. Looks like I
should remove it from contentStream too. How to do that?

-- 
Regards,
Alexander Teut
http://g <http://rikkimongoose.ru>ithub.com/rikkimongoose