OneOf property is failing during OAS Schema Validation

[Rajesh PS]

Hello Team,

Requesting you to please check this issue and help. Performing a validation against respective schema with oneOf, discriminator and mapping property in oas3.0 and validating the fields (if fields are missed then throws 4** errors).

Error:

{
"fault": {
"faultstring": "OASValidation MAM-EXT-SpecValidation with resource "oas://openapi.yaml": failed with reason: "[ERROR - An error occurred during schema validation - com.google.common.util.concurrent.UncheckedExecutionException: java.lang.NullPointerException.: []]"",
"detail": {
"errorcode": "steps.oasvalidation.Failed"
}
}
}

yaml file looks like:

Json payload looks like:

{
"billableHeader":{
"sourceSystem":"UPSTREAM_APP",
"sourceTransactionType":"INVOICE",
"eventType":"BATCH",
"messageCreationDatetime":"20220811140203",
"timeZoneCode":"GMT",
"isBulkProcessing":true,
"product":"Airlcl"
}
}

[Greg Dennis]

I think you're going to need to go to the particular OAS implementation you're using and ask them. This repo (and organization) manages the JSON Schema spec itself, not any particular library.

Some other things to note:

• OAS 3.0 uses its own flavor of JSON Schema that's based on but isn't exactly draft 4.
• discriminator is an OAS-only thing.

When you file an issue with them, see if you can replicate the problem with a small example, and provide that to them. Just posting the error without context isn't helpful.

Sorry we can't be of more help.

[Rajesh PS]

@gregsdennis could you please check now

components:
  schemas:
    BillableItemsPost:
      title: Billable Items Post Request
      description: Object defines JSON schema of SAP OTC Billable Items post request
      type: object
      discriminator:
        propertyName: product
        mapping:
          Generic: '#/components/schemas/BillableItemsPost'
      properties:
        billableHeader:
          description: Billable Item request header
          type: object
          additionalProperties: false
          properties:
            product:
              description: A discriminator property to identify the schema specifics
              type: string
              enum:
                - Generic
                - Airlcl
              example: Generic
              discriminator:
                propertyName: product
                mapping:
                  Generic: '#/components/schemas/BillableItemsPost'
            sourceSystem:
              description: Upstream System Name **Required for CW1**
              type: string
              minLength: 1
              maxLength: 6
              example: GCSS
            sourceTransactionType:
              description: >-
                Source Transaction Type(O- Booking Confirmed, L- Issue Verify
                Copy or Pre- Invoice Event, I- Invoice) **Required for CW1**
              type: string
              enum:
                - BOOKING_CONFIRMED
                - ISSUE_VERIFY_COPY
                - INVOICE
                - CREDIT
                - CREATE_REV
                - UPDATE_REV
                - CANCEL_REV
                - UPDATE_COST
                - CANCEL_COST
                - CANCEL_INVOICE
              example: INVOICE
            eventType:
              description: Event Type (Ad-hoc, Batch)
              type: string
              enum:
                - AD-HOC
                - BATCH
              example: BATCH
            messageCreationDatetime:
              description: >-
                Message Creation Timstamp, used for the message synchronizing to
                ensure message is picked in correct sequence **Required for
                CW1**
              type: string
              format: timestamp
              example: '20220811140203'
            timeZoneCode:
              description: >-
                Time Zone, Will be used if needed along-with TimeStamp
                **Required for CW1**
              type: string
              minLength: 1
              maxLength: 4
              example: GMT
            isBulkProcessing:

paths:
  /billable-items:
    post:
      summary: Create Billable Item
      description: Creates a new Billable Item in S/4 HANA
      tags:
        - Billable Item
      operationId: billable-item-post
      requestBody:
        content:
          application/json:
            schema:
              x-field-extra-annotation: '@com.fasterxml.jackson.annotation.JsonTypeInfo(
                use = com.fasterxml.jackson.annotation.JsonTypeInfo.Id.NAME,
                include = com.fasterxml.jackson.annotation.JsonTypeInfo.As.PROPERTY,
                property = "product")'
              x-class-extra-annotation: '@com.fasterxml.jackson.annotation.@JsonSubTypes({
                @JsonSubTypes.Type(value = BillableItemsPost.class, name = "Generic"),
                @JsonSubTypes.Type(value = BillableItemsPostAirlcl.class, name = "Airlcl")})'
              oneOf:
                - $ref: '#/components/schemas/BillableItemsPost'
                - $ref: '#/components/schemas/BillableItemsPostAirlcl'
              discriminator:
                propertyName: product
                mapping:
                  Generic: '#/components/schemas/BillableItemsPost'
                  Airlcl: '#/components/schemas/BillableItemsPostAirlcl'

[Greg Dennis]

@RPS044 I don't think you read my response. This isn't something we can help with here. You need to open an issue with the OpenAPI library you're using.

[LasneF]

@gregsdennis you should close this one