PDF/A-4. Add new flavours

[MaximPlusov]

Summary by CodeRabbit

Release Notes

• New Features
  • Added support for PDF/A-4 2020 edition (ISO 19005-4:2020) with three flavor variants, enabling validation of the latest PDF/A compliance standards for enhanced document archival capabilities.

[coderabbitai]

📝 Walkthrough

Walkthrough

Extends the PDFFlavour enum with three new PDF/A-4 variants (PDFA_4_2020, PDFA_4_F_2020, PDFA_4_E_2020) and introduces a corresponding Specification constant ISO_19005_4_2020 to support ISO 19005-4:2020 standard validation.

Changes

Cohort / File(s)	Summary
PDF/A-4 Specification Support src/main/java/org/verapdf/parser/PDFFlavour.java	Added three new PDFFlavour enum constants for PDF/A-4 variants and one new Specification constant mapping to ISO 19005-4:2020 standard.

Possibly related PRs

• Add WCAG 2.2 PDF2.0 favours #686: Modifies the same PDFFlavour/Specification enums to add new flavour and specification constants.

Poem

🐰 Four new lines, a rabbit's delight,
PDF/A-4 shining so bright,
ISO standards dance and play,
Flavours multiplied today,
Hopping forward, specs take flight! ✨

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🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'PDF/A-4. Add new flavours' accurately and concisely describes the main change: adding new PDF/A-4 flavour enum constants to the PDFFlavour class.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch pdfa4

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[coderabbitai]

🧹 Nitpick comments (1)

src/main/java/org/verapdf/parser/PDFFlavour.java (1)

78-79: Clarify the intent of ISO_19005_4 vs ISO_19005_4_2020.

Line 78 introduces a near-duplicate specification identifier. Since isFlavourPart relies on exact enum equality, a short Javadoc/inline note here would prevent accidental misuse and make alias/version intent explicit.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@src/main/java/org/verapdf/parser/PDFFlavour.java` around lines 78 - 79, Add a
short Javadoc or inline comment next to the PDFFlavour enum entries ISO_19005_4
and ISO_19005_4_2020 clarifying their relationship and intended use (e.g., that
ISO_19005_4_2020 is the 2020 variant and ISO_19005_4 is an alias/legacy
identifier or vice versa) so callers relying on exact equality (such as
isFlavourPart) understand which to use; reference the enum name PDFFlavour and
the enum constants ISO_19005_4 and ISO_19005_4_2020 and mention isFlavourPart to
make the intent explicit.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@src/main/java/org/verapdf/parser/PDFFlavour.java`:
- Around line 78-79: Add a short Javadoc or inline comment next to the
PDFFlavour enum entries ISO_19005_4 and ISO_19005_4_2020 clarifying their
relationship and intended use (e.g., that ISO_19005_4_2020 is the 2020 variant
and ISO_19005_4 is an alias/legacy identifier or vice versa) so callers relying
on exact equality (such as isFlavourPart) understand which to use; reference the
enum name PDFFlavour and the enum constants ISO_19005_4 and ISO_19005_4_2020 and
mention isFlavourPart to make the intent explicit.

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ℹ️ Review info

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 571e2c3 and 06229c0.

📒 Files selected for processing (1)

• src/main/java/org/verapdf/parser/PDFFlavour.java