Validation annotations on @PathVariable/@RequestParam are ignored in generated OpenAPI schema + 'date' support

[wodrobina]

No description provided.

[Copilot]

Pull request overview

This PR improves generated API specs by (1) applying documented Bean Validation constraints to OpenAPI parameter schemas (path/query/header) and (2) adding explicit DATE field support in the JSON Schema generator, with corresponding sample endpoints and tests.

Changes:

• Apply validationConstraints from parameter descriptors to OpenAPI parameter schemas (min/max length, pattern, minimum/maximum).
• Add DATE type support in JSON Schema generation as type: string with format: date, plus optional format validation.
• Add sample controller + integration tests demonstrating constrained request params/path variables and the resulting documentation.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
samples/restdocs-api-spec-sample/src/test/java/com/epages/restdocs/apispec/sample/ProductSearchIntegrationTest.java	Adds sample integration tests that document/query/path parameter constraints via validationConstraints.
samples/restdocs-api-spec-sample/src/main/java/com/epages/restdocs/apispec/sample/ProductSearchController.java	Adds sample endpoints annotated with Bean Validation constraints on @RequestParam/@PathVariable.
restdocs-api-spec-openapi3-generator/src/test/kotlin/com/epages/restdocs/apispec/openapi3/OpenApi3GeneratorTest.kt	Adds assertions that parameter constraints are reflected in generated OpenAPI schemas.
restdocs-api-spec-openapi3-generator/src/main/kotlin/com/epages/restdocs/apispec/openapi3/OpenApi3Generator.kt	Implements constraint-to-schema mapping for OpenAPI parameter schemas.
restdocs-api-spec-jsonschema/src/test/kotlin/com/epages/restdocs/apispec/jsonschema/JsonSchemaFromFieldDescriptorsGeneratorTest.kt	Adds tests for DATE schema generation and stricter error messages for unsupported types.
restdocs-api-spec-jsonschema/src/main/kotlin/com/epages/restdocs/apispec/jsonschema/JsonSchemaFromFieldDescriptorsGenerator.kt	Implements DATE field schema generation and improves unsupported-type error messaging.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.