Fix NPE in getGlyphName()

[LonelyMidoriya]

Summary by CodeRabbit

• Bug Fixes
  • Improved handling of glyph name requests when font data is not yet initialized, preventing unexpected errors.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 307582e2-d03f-4af3-aaa3-6e4070548d32

📥 Commits

Reviewing files that changed from the base of the PR and between 2f315b8 and 9370f6c.

📒 Files selected for processing (1)

• src/main/java/org/verapdf/pd/font/opentype/OpenTypeFontProgram.java

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📝 Walkthrough

Walkthrough

getGlyphName(int) now returns null when the delegated OpenType font is unavailable. It preserves delegation when the font is initialized.

Changes

OpenType glyph lookup

Layer / File(s)	Summary
Guard glyph-name delegation src/main/java/org/verapdf/pd/font/opentype/OpenTypeFontProgram.java	getGlyphName(int) checks whether font is initialized before delegation and returns null otherwise.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• veraPDF/veraPDF-parser#688: Both PRs add null handling for uninitialized delegated-font state in font lookup methods.

Suggested reviewers: maximplusov

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: preventing a null pointer exception in getGlyphName().
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch open-type-font-program

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