add back null check

wing328 · wing328 · commit 81e4e60bf937 · 2026-01-22T18:40:57.000+08:00
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java
@@ -722,7 +722,7 @@ protected boolean isSelfReference(String name, Schema subSchema) {
      */
     public Schema normalizeSchema(Schema schema, Set<Schema> visitedSchemas) {
         // normalize reference schema
-        if (StringUtils.isNotEmpty(schema.get$ref())) {
+        if (schema != null && StringUtils.isNotEmpty(schema.get$ref())) {
             normalizeReferenceSchema(schema);
         }
 

Original file line number	Diff line number	Diff line change
`@@ -722,7 +722,7 @@ protected boolean isSelfReference(String name, Schema subSchema) {`
`722`	`722`	`*/`
`723`	`723`	`public Schema normalizeSchema(Schema schema, Set<Schema> visitedSchemas) {`
`724`	`724`	`// normalize reference schema`
`725`		`- if (StringUtils.isNotEmpty(schema.get$ref())) {`
	`725`	`+ if (schema != null && StringUtils.isNotEmpty(schema.get$ref())) {`
`726`	`726`	`normalizeReferenceSchema(schema);`
`727`	`727`	`}`
`728`	`728`