Skip to content

Add a built-in @SimpleMinimalBuilder template annotation that disables all optional builder features. - #259

Open
AndreasIgel wants to merge 13 commits into
java-helpers:mainfrom
AndreasIgel:devin/fix-issue-257-simple-minimal-builder
Open

Add a built-in @SimpleMinimalBuilder template annotation that disables all optional builder features.#259
AndreasIgel wants to merge 13 commits into
java-helpers:mainfrom
AndreasIgel:devin/fix-issue-257-simple-minimal-builder

Conversation

@AndreasIgel

Copy link
Copy Markdown
Collaborator

Summary

Add a built-in @SimpleMinimalBuilder template annotation that disables all optional builder features.

Changes

  • New core annotation @SimpleMinimalBuilder implemented purely as @SimpleBuilder.Template with every optional feature set to OptionState.DISABLED and builderSuffix = "Builder" / setterSuffix = "".
  • New SimpleMinimalBuilderTest with two tests:
    • standalone full generated-source assertion for a minimal PersonDtoBuilder
    • inheritance test verifying the template propagates to subclasses and does not produce suppliers, consumers, With interface, @Generated, @BuilderImplementation, IBuilderBase, @JsonPOJOBuilder, or varargs helpers
  • Updated docs/CONFIGURATION.md:
    • added @SimpleMinimalBuilder to the "Need / Use" table
    • rewrote the "Minimal Builder" example to use the built-in annotation
    • updated the "Minimal Builder Template" custom-template examples to include generateJacksonModule and cross-reference the built-in annotation
  • Added example/CustomerDto annotated with @SimpleMinimalBuilder together with its generated CustomerDtoBuilder as a usage example.

Verification

mvn -pl core,processor,example test -am succeeds:

  • Processor: 344 tests passed
  • Example module compiled and generated CustomerDtoBuilder successfully

Notes

No existing test ad-hoc minimal templates were replaced:

  • MyBuliderForTestAnnotation uses a custom MiniBuilder / set suffix
  • BuilderConfigurationReaderTest cases rely on custom builderSuffix / setterSuffix values
  • BuilderAnnotationInheritanceTest and AnnotationCopyTest cases are intentionally testing specific option combinations

AndreasIgel and others added 13 commits August 15, 2026 10:57
The class-level Javadoc and docs/CONFIGURATION.md implied that
@SimpleBuilder is inherited by subclasses, but the annotation was not
meta-annotated with @inherited. As a result BuilderProcessor, which
collects types via RoundEnvironment.getElementsAnnotatedWith(...),
only produced builders for the exact type carrying @SimpleBuilder and
not for unannotated subclasses.

Add @inherited to @SimpleBuilder so subclasses are treated as if they
also carried the annotation, mirroring the existing behaviour of
@SimpleBuilder.Template (which is already @inherited). Update the
Javadoc to document the inheritance explicitly and clarify the
CONFIGURATION.md wording. @Ignore4BuilderGeneration still suppresses
generation for the exact type it is placed on, so opt-outs continue
to work as before.

Add SimpleBuilderInheritanceTest covering direct inheritance, the
opt-out interaction, and multi-level (grandchild) inheritance.

Closes java-helpers#244

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
…ance

Rename SimpleBuilderInheritanceTest to BuilderAnnotationInheritanceTest
so the name reflects that it covers both builder-triggering annotations.
Add unannotatedSubclassGetsBuilderFromInheritedTemplate, which verifies
that a custom @inherited template annotation (meta-annotated with
@SimpleBuilder.Template) propagates to unannotated subclasses, matching
the existing behaviour of @SimpleBuilder itself.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
The Template Javadoc and CONFIGURATION.md "Template Annotations" section
did not explain that @SimpleBuilder.Template is @inherited, nor that a
custom template annotation must additionally declare @inherited to
propagate to unannotated subclasses. Add explicit documentation and an
example showing the @inherited custom annotation pattern.

Also move assertNoBuilderGenerated to ProcessorAsserts so it is shared
by BuilderAnnotationInheritanceTest and Ignore4BuilderGenerationTest
instead of being duplicated as a private helper in each test class.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
While @SimpleBuilder and @inherited template annotations now correctly
trigger builder generation for unannotated subclasses, the configuration
options declared on the parent's @SimpleBuilder(options = ...) or template
are not yet applied to inherited subclass builders — they use default
options instead. This is tracked separately in issue java-helpers#245.

Add caveats to the SimpleBuilder Javadoc, the CONFIGURATION.md Template
Annotations section, and the Template Annotations Not Working
troubleshooting section so users are not surprised by this limitation.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Add explicit guidance that @SimpleBuilder.Template is a meta-annotation
for custom annotation declarations (@interface) only and cannot be
placed directly on a class or record. @SimpleBuilder is for direct
one-off annotation of classes/records.

- SimpleBuilder.java: add 'When to use' section to class-level Javadoc
- SimpleBuilder.Template Javadoc: state it can only be placed on
  annotation types (ANNOTATION_TYPE), not on classes/records
- CONFIGURATION.md 'Template Annotations': add comparison table and
  introductory paragraph
- CONFIGURATION.md troubleshooting: add item about @SimpleBuilder.Template
  not being a class annotation

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
…Javadoc

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
…arget

The compiler and IDE already enforce @target(ANNOTATION_TYPE) and show
a clear error when @SimpleBuilder.Template is placed on a class/record,
so this troubleshooting item adds no value.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-Authored-By: Andreas Igel <andreas.igel@computacenter.com>
@codecov

codecov Bot commented Aug 17, 2026

Copy link
Copy Markdown

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

1 participant