Validation JSON subschema definition based on ENUM value - json

Question

I'm trying to validate and report errors of a JSON schema for a build process.
Based on the type enum I want to validate against a specific subschema and report errors for that schema.
If the type attribute is "weblogic" then I only want to validate against the "weblogic" subschema definition. And do the same if the type is tomcat
This is my current schema
{
"$schema": "http://json-schema.org/draft-07/schema#",
"$id": "#",
"type": "object",
"title": "The Root Schema",
"required": [
"middleware"
],
"properties": {
"middleware": {
"$ref": "#/definitions/middleware"
}
},
"definitions": {
"middleware":{
"type": "array",
"items": {
"oneOf":[
{"$ref": "#/definitions/weblogic"},
{"$ref": "#/definitions/tomcat"}
],
"required": ["type","buildInfo"]
}
},
"weblogic": {
"properties": {
"type": {"const": "weblogic"},
"buildInfo": {
"properties": {
"adminSslPort": {
"type": "integer"
}
},
"additionalProperties": false,
"required": ["adminSslPort"]
}
}
},
"tomcat":{
"properties": {
"type": {"const": "tomcat"},
"buildInfo":{
"properties": {
"classpath": {
"type": "string"
}
},
"additionalProperties": false,
"required": ["classpath"]
}
}
}
}
}
And my JSON payload
{
"middleware":[
{
"type": "weblogic",
"buildInfo":{
"adminSslPort": 7002
}
},
{
"type": "tomcat",
"buildInfo":{
}
}
]
}
Now I expect this to fail since the buildInfo object is missing the classpath attribute, and it does fail validation.
But the errors I get back include the validation errors against the "weblogic" definition.
[
{
"pointerToViolation": "#/middleware/1",
"causingExceptions": [
{
"schemaLocation": "#/definitions/weblogic",
"pointerToViolation": "#/middleware/1",
"causingExceptions": [
{
"schemaLocation": "#/definitions/weblogic/properties/buildInfo",
"pointerToViolation": "#/middleware/1/buildInfo",
"causingExceptions": [],
"keyword": "required",
"message": "required key [adminSslPort] not found"
},
{
"schemaLocation": "#/definitions/weblogic/properties/type",
"pointerToViolation": "#/middleware/1/type",
"causingExceptions": [],
"keyword": "const",
"message": ""
}
],
"message": "2 schema violations found"
},
{
"schemaLocation": "#/definitions/tomcat/properties/buildInfo",
"pointerToViolation": "#/middleware/1/buildInfo",
"causingExceptions": [],
"keyword": "required",
"message": "required key [classpath] not found"
}
],
"keyword": "oneOf",
"message": "#: 0 subschemas matched instead of one"
}
]
Is there a way to only validate against the subschema that the type matches against?

Answer 1

You can use if and then keywords as follows.
{
"$schema": "http://json-schema.org/draft-07/schema#",
"$id": "#",
"type": "object",
"title": "The Root Schema",
"required": [
"middleware"
],
"properties": {
"middleware": {
"$ref": "#/definitions/middleware"
}
},
"definitions": {
"middleware":{
"type": "array",
"items": {
"type": "object",
"allOf": [
{"$ref": "#/definitions/weblogic"},
{"$ref": "#/definitions/tomcat"}
],
"required": ["type","buildInfo"]
}
},
"weblogic": {
"if": {
"properties": {
"type": {
"const": "weblogic"
}
}
},
"then": {
"properties": {
"buildInfo": {
"properties": {
"adminSslPort": {
"type": "integer"
}
},
"additionalProperties": false,
"required": ["adminSslPort"]
}
}
}
},
"tomcat":{
"if": {
"properties": {
"type": {
"const": "tomcat"
}
}
},
"then": {
"properties": {
"buildInfo":{
"properties": {
"classpath": {
"type": "string"
}
},
"additionalProperties": false,
"required": ["classpath"]
}
}
}
}
}
}