[jira] [Created] (PDFBOX-5860) StringIndexOutOfBoundsException in AppearanceGeneratorHelper

["Nicola Costantini (Jira)" <ji...@apache.org>]

Nicola Costantini created PDFBOX-5860:
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             Summary: StringIndexOutOfBoundsException in AppearanceGeneratorHelper
                 Key: PDFBOX-5860
                 URL: https://issues.apache.org/jira/browse/PDFBOX-5860
             Project: PDFBox
          Issue Type: Bug
          Components: AcroForm
    Affects Versions: 2.0.32
            Reporter: Nicola Costantini


The bug fix for https://issues.apache.org/jira/browse/PDFBOX-5784 created another issue.

In AppearanceGeneratorHelper line 676 is assumed, that fields have non-empty values:

 
{code:java}
font.getStringWidth(value.substring(0, 1)){code}
 

resulting in this exceptions for empty fields, for example when refreshAppearances is called:


 
{code:java}
java.lang.StringIndexOutOfBoundsException: begin 0, end 1, length 0

    at java.base/java.lang.String.checkBoundsBeginEnd(String.java:4602)
    at java.base/java.lang.String.substring(String.java:2705)
    at org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.insertGeneratedCombAppearance(AppearanceGeneratorHelper.java:676)
    at org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.insertGeneratedAppearance(AppearanceGeneratorHelper.java:569)
    at org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.setAppearanceContent(AppearanceGeneratorHelper.java:441)
    at org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.setAppearanceValue(AppearanceGeneratorHelper.java:248)
    at org.apache.pdfbox.pdmodel.interactive.form.PDTextField.constructAppearances(PDTextField.java:264)
    at org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm.refreshAppearances(PDAcroForm.java:361){code}
 

 



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