[PDFBOX-2822] infinite loop of searching for a key in PDResources

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: PDModel
• Labels: regression
• Assignee: Tilman Hausherr
• Reporter: Konstantin Kakunin
• Created: 02/Jun/15 06:07
• Updated: 17/Mar/16 19:07
• Resolved: 02/Jun/15 09:47

Description

error in code of class - org.apache.pdfbox.pdmodel.PDResources

    private COSName createKey(COSName kind, String prefix)
    {
        COSDictionary dict = (COSDictionary)resources.getDictionaryObject(kind);
        if (dict == null)
        {
            return COSName.getPDFName(prefix + 1);
        }

        // find a unique key
        String key;
        do
        {
            key = prefix + (dict.keySet().size() + 1);
        }
        while (dict.containsKey(key));    <--------------- infinite loop of searching for a key
        return COSName.getPDFName(key);
    }

my test code:

public class pdfmain_svg {

	public static void main(String[] args) throws Exception {
		System.out.println("hello");
		PDDocument document = PDDocument.load(new File(
				"d:\\Project\\pdfbox-image\\Acro6JSGuide.pdf"));

		float fontSize = 10f;

		PDFont font = PDType0Font.load(document, new File(
				"c:\\Windows\\Fonts\\Arial.TTF"));

		for (int pageIndex = 0; pageIndex < document.getNumberOfPages(); pageIndex++) {
			System.out.println("page index = " + pageIndex);
			PDPage page = document.getPage(pageIndex);  
			PDPageContentStream contentStream = new PDPageContentStream(
					document, page, true, true);
			contentStream.setFont(font, fontSize); <---------------- hang on page 6
			contentStream.setNonStrokingColor(Color.LIGHT_GRAY);
			contentStream.beginText();
			contentStream.newLineAtOffset(100, 100);
			contentStream.showText("Test printing");
			contentStream.endText();
			contentStream.close();
		}
		File f = new File("d:\\work\\kostya.pdf");
		document.save(f);
		document.close();
		System.out.println("f=" + f.getAbsolutePath() + ": " + f.exists());
	}

}

Issue Links

• is duplicated by: PDFBOX-2907 Non-termination in PDResources.createKey()