[JAVA-SPRING,KOTLIN-SPRING] - Enhance pageable validation by adding minSize and minPage constraints; Search also allOf references for constraints and defaults

[Picazsoo]

Functionality implemented in #23575 is a bit incomplete (it is fully functional, but can miss some edge cases). In cases when the minimum/maximum/default values live on a schema referenced via allOf, the validations/defaults fail to generate.This PR fixes the behavior to properly discover the validation minimum/maximum constraints as well as the default.

• for default, the inline default wins (overrides any value defined deeper in the schema)
• for maximum, the smallest maximum wins (so if maximum in allOf referenced schema is 75 and inline maximum is 50, then the resulting maximum is 50)
• for minimum, the biggest minimum wins (so if minimum in allOf referenced schema is 100 and inline minimum is 10, then the resulting minimum is 100)

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Summary by cubic

Adds minSize and minPage support to pageable validation and resolves page/size constraints and defaults through $ref and allOf. Spring Java and Kotlin now generate @ValidPageable bounds and @PageableDefault values from shared component schemas.

• New Features

  • @ValidPageable supports minSize and minPage in Java and Kotlin; generators emit these when present.

• Bug Fixes

  • Pageable scanning resolves maximum, minimum, and default through $ref/allOf with intersection semantics (smallest max, largest min; inline default wins).
  • Constraints and defaults on shared component schemas are applied, including generating @PageableDefault from allOf references.
  • Avoid NPE when scanning sort enums for array schemas with no items; improved array detection in sort enum scanning.

^{Written for commit daa33e0. Summary will update on new commits.}

[cubic-dev-ai]

1 issue found across 17 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringPageableScanUtils.java">

<violation number="1" location="modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringPageableScanUtils.java:165">
P2: Array schemas without `items` can now NPE here because `ModelUtils.isArraySchema()` does not guarantee `schema.getItems()` is non-null.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}