use schema related to a ref schema property

Author: HugoMario

src/main/java/io/swagger/codegen/v3/generators/java/SpringCodegen.java

@@ -21,6 +21,7 @@
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.PathItem;
+import io.swagger.v3.oas.models.media.Schema;
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -468,6 +469,19 @@ public void execute(Template.Fragment fragment, Writer writer) throws IOExceptio
         }
     }
 
+    @Override
+    public CodegenProperty fromProperty(String name, Schema propertySchema) {
+        CodegenProperty codegenProperty = super.fromProperty(name, propertySchema);
+        if (propertySchema != null && propertySchema.get$ref() != null) {
+            Schema refSchema = OpenAPIUtil.getSchemaFromRefSchema(propertySchema, this.openAPI);
+            if (refSchema != null  && !isObjectSchema(refSchema) && refSchema.getEnum() == null) {
+                setSchemaProperties(name, codegenProperty, refSchema);
+                processPropertySchemaTypes(name, codegenProperty, refSchema);
+            }
+        }
+        return codegenProperty;
+    }
+
     @Override
     public void addOperationToGroup(String tag, String resourcePath, Operation operation, CodegenOperation co, Map<String, List<CodegenOperation>> operations) {
         if((isDefaultLibrary() || isSpringMvcLibrary()) && !useTags) {