openapi: 3.0.3
info:
  title: Spring Data REST Association Collection API
  description: Spring Data REST exposes Spring Data repositories as hypermedia-driven RESTful resources following the HATEOAS constraint. It provides automatic endpoint generation for CRUD operations, pagination, sorting, projections, and custom query endpoints derived from repository methods.
  version: 4.3.0
  contact:
    name: Spring Team
    url: https://spring.io/projects/spring-data-rest
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: http://localhost:8080
  description: Default local server
tags:
- name: Collection
paths:
  /{repository}:
    get:
      operationId: listResources
      summary: List Repository Resources
      description: Returns a paginated collection of resources from the repository
      tags:
      - Collection
      parameters:
      - name: repository
        in: path
        required: true
        schema:
          type: string
        description: Repository resource path (e.g., users, orders)
      - name: page
        in: query
        required: false
        schema:
          type: integer
          default: 0
        description: Zero-based page number
      - name: size
        in: query
        required: false
        schema:
          type: integer
          default: 20
        description: Number of items per page
      - name: sort
        in: query
        required: false
        schema:
          type: array
          items:
            type: string
        description: Sort expression (e.g., name,asc or createdAt,desc)
      responses:
        '200':
          description: Paginated collection of resources
          content:
            application/hal+json:
              schema:
                $ref: '#/components/schemas/PagedResource'
    post:
      operationId: createResource
      summary: Create Repository Resource
      description: Creates a new resource in the repository
      tags:
      - Collection
      parameters:
      - name: repository
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '201':
          description: Resource created
          headers:
            Location:
              schema:
                type: string
              description: URL of the newly created resource
          content:
            application/hal+json:
              schema:
                $ref: '#/components/schemas/Resource'
        '400':
          description: Validation error
components:
  schemas:
    Resource:
      type: object
      properties:
        _links:
          $ref: '#/components/schemas/Links'
      additionalProperties: true
    PagedResource:
      type: object
      properties:
        _embedded:
          type: object
          additionalProperties:
            type: array
            items:
              $ref: '#/components/schemas/Resource'
        _links:
          $ref: '#/components/schemas/Links'
        page:
          $ref: '#/components/schemas/PageMetadata'
    PageMetadata:
      type: object
      properties:
        size:
          type: integer
          description: Number of items per page
        totalElements:
          type: integer
          description: Total number of items
        totalPages:
          type: integer
          description: Total number of pages
        number:
          type: integer
          description: Current page number (zero-based)
    Links:
      type: object
      additionalProperties:
        $ref: '#/components/schemas/Link'
    Link:
      type: object
      properties:
        href:
          type: string
          description: The URI of the link
        templated:
          type: boolean
          description: Whether the href is a URI template