GH-237 Properly handle non-existing info objects from empty schemas (Fix #237)

Author: dzikoysk

examples/javalin-gradle-kotlin/src/main/java/io/javalin/openapi/plugin/test/JavalinTest.java

@@ -92,6 +92,7 @@ public static void main(String[] args) {
                                             .withScope("write_pets")
                                             .withScope("read_pets")
                                     )
+                                    .withGlobalSecurity("BearerAuth")
                             )
                             .withDefinitionProcessor(content -> { // you can add whatever you want to this document using your favourite json api
                                 content.set("test", new TextNode("Value"));

javalin-plugins/javalin-openapi-plugin/src/main/kotlin/io/javalin/openapi/plugin/OpenApiPlugin.kt

@@ -47,8 +47,12 @@ open class OpenApiPlugin(userConfig: Consumer<OpenApiPluginConfiguration>) : Plu
         val docsNode = jsonMapper.readTree(content) as ObjectNode
 
         //process OpenAPI "info"
-        val currentInfo = jsonMapper.readerForUpdating(docsNode.get("info"))
-        docsNode.replace("info", currentInfo.readValue(jsonMapper.convertValue(info, JsonNode::class.java)))
+        val updatedInfo =
+            docsNode.get("info")
+                ?.let { jsonMapper.readerForUpdating(it) }
+                ?.readValue<JsonNode>(jsonMapper.convertValue(info, JsonNode::class.java))
+                ?: jsonMapper.convertValue(info, JsonNode::class.java)
+        docsNode.replace("info", updatedInfo)
 
         // process OpenAPI "servers"
         docsNode.replace("servers", jsonMapper.convertValue(servers, JsonNode::class.java))