PDColorspaceFactory does not recognize colorspace DeviceGray (patch included
herein)
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Key: PDFBOX-981
URL: https://issues.apache.org/jira/browse/PDFBOX-981
Project: PDFBox
Issue Type: Bug
Components: Text extraction
Affects Versions: 1.5.0
Reporter: Matt England
I was trying to use PDFTextStripper to extract text from a large corpus of PDF
files. In some of them, the method:
org.apache.pdfbox.pdmodel.graphics.color.PDColorSpaceFactory.createColorSpace(
COSBase colorSpace, Map colorSpaces )
fails to recognize the case when the colorSpace argument is of type COSArray
and the array's (first) element corresponds to COSName.DEVICEGRAY. Adding that
case successfully parses the files that failed with the stock pdfbox-1.5.0.
Below is a diff of my patched PDColorSpaceFactory that handles the case where
the colorspace name is DeviceGray. Incidentally, it occurs to me that another
(possibly better) approach is to call through to createColorSpace(String) when
no other case matches.
% diff PDColorSpaceFactory.java.orig PDColorSpaceFactory.java
94a95,97
> else if ( type.getName().equals( PDDeviceGray.NAME) ) {
> retval = new PDDeviceGray();
> }
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