feat: Centralize and expose a registerTypeAdapters method on GsonFactory (#1510)

Co-authored-by: William Bergamin <wbergamin@salesforce.com>

Author: luanpotter

slack-api-client/src/main/java/com/slack/api/util/json/GsonFactory.java

@@ -29,23 +29,10 @@ private GsonFactory() {
      * Most of the Slack APIs' key naming is snake-cased.
      */
     public static Gson createSnakeCase() {
-        return new GsonBuilder()
-                .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
-                .registerTypeAdapter(Instant.class, new JavaTimeInstantFactory())
-                .registerTypeAdapter(File.class, new GsonFileFactory())
-                .registerTypeAdapter(LayoutBlock.class, new GsonLayoutBlockFactory())
-                .registerTypeAdapter(TextObject.class, new GsonTextObjectFactory())
-                .registerTypeAdapter(ContextBlockElement.class, new GsonContextBlockElementFactory())
-                .registerTypeAdapter(BlockElement.class, new GsonBlockElementFactory())
-                .registerTypeAdapter(RichTextElement.class, new GsonRichTextElementFactory())
-                .registerTypeAdapter(FunctionExecutedEvent.InputValue.class, new GsonFunctionExecutedEventInputValueFactory())
-                .registerTypeAdapter(Attachment.VideoHtml.class, new GsonMessageAttachmentVideoHtmlFactory())
-                .registerTypeAdapter(MessageChangedEvent.PreviousMessage.class, new GsonMessageChangedEventPreviousMessageFactory())
-                .registerTypeAdapter(AppWorkflow.StepInputValue.class, new GsonAppWorkflowStepInputValueFactory())
-                .registerTypeAdapter(AppWorkflow.StepInputValueElementDefault.class, new GsonAppWorkflowStepInputValueDefaultFactory())
-                .registerTypeAdapter(LogsResponse.DetailsChangedValue.class, new GsonAuditLogsDetailsChangedValueFactory())
-                .registerTypeAdapter(LogsResponse.UserIDs.class, new GsonAuditLogsDetailsUserIDsFactory())
-                .create();
+        GsonBuilder gsonBuilder = new GsonBuilder()
+                .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);
+        registerTypeAdapters(gsonBuilder, false);
+        return gsonBuilder.create();
     }
 
     /**
@@ -54,21 +41,8 @@ public static Gson createSnakeCase() {
     public static Gson createSnakeCase(SlackConfig config) {
         boolean failOnUnknownProps = config.isFailOnUnknownProperties();
         GsonBuilder gsonBuilder = new GsonBuilder()
-                .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
-                .registerTypeAdapter(Instant.class, new JavaTimeInstantFactory(failOnUnknownProps))
-                .registerTypeAdapter(File.class, new GsonFileFactory(failOnUnknownProps))
-                .registerTypeAdapter(LayoutBlock.class, new GsonLayoutBlockFactory(failOnUnknownProps))
-                .registerTypeAdapter(TextObject.class, new GsonTextObjectFactory(failOnUnknownProps))
-                .registerTypeAdapter(ContextBlockElement.class, new GsonContextBlockElementFactory(failOnUnknownProps))
-                .registerTypeAdapter(BlockElement.class, new GsonBlockElementFactory(failOnUnknownProps))
-                .registerTypeAdapter(RichTextElement.class, new GsonRichTextElementFactory(failOnUnknownProps))
-                .registerTypeAdapter(FunctionExecutedEvent.InputValue.class, new GsonFunctionExecutedEventInputValueFactory())
-                .registerTypeAdapter(Attachment.VideoHtml.class, new GsonMessageAttachmentVideoHtmlFactory(failOnUnknownProps))
-                .registerTypeAdapter(MessageChangedEvent.PreviousMessage.class, new GsonMessageChangedEventPreviousMessageFactory(failOnUnknownProps))
-                .registerTypeAdapter(AppWorkflow.StepInputValue.class, new GsonAppWorkflowStepInputValueFactory(failOnUnknownProps))
-                .registerTypeAdapter(AppWorkflow.StepInputValueElementDefault.class, new GsonAppWorkflowStepInputValueDefaultFactory(failOnUnknownProps))
-                .registerTypeAdapter(LogsResponse.DetailsChangedValue.class, new GsonAuditLogsDetailsChangedValueFactory(failOnUnknownProps))
-                .registerTypeAdapter(LogsResponse.UserIDs.class, new GsonAuditLogsDetailsUserIDsFactory(failOnUnknownProps));
+                .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);
+        registerTypeAdapters(gsonBuilder, failOnUnknownProps);
         if (failOnUnknownProps || config.isLibraryMaintainerMode()) {
             gsonBuilder = gsonBuilder.registerTypeAdapterFactory(new UnknownPropertyDetectionAdapterFactory());
         }
@@ -83,27 +57,32 @@ public static Gson createSnakeCase(SlackConfig config) {
      */
     public static Gson createCamelCase(SlackConfig config) {
         boolean failOnUnknownProps = config.isFailOnUnknownProperties();
-        GsonBuilder gsonBuilder = new GsonBuilder()
+        GsonBuilder gsonBuilder = new GsonBuilder();
+        registerTypeAdapters(gsonBuilder, failOnUnknownProps);
+        if (failOnUnknownProps || config.isLibraryMaintainerMode()) {
+            gsonBuilder = gsonBuilder.registerTypeAdapterFactory(new UnknownPropertyDetectionAdapterFactory());
+        }
+        if (config.isPrettyResponseLoggingEnabled()) {
+            gsonBuilder = gsonBuilder.setPrettyPrinting();
+        }
+        return gsonBuilder.create();
+    }
+
+    public static void registerTypeAdapters(GsonBuilder builder, boolean failOnUnknownProps) {
+        builder
                 .registerTypeAdapter(Instant.class, new JavaTimeInstantFactory(failOnUnknownProps))
                 .registerTypeAdapter(File.class, new GsonFileFactory(failOnUnknownProps))
                 .registerTypeAdapter(LayoutBlock.class, new GsonLayoutBlockFactory(failOnUnknownProps))
                 .registerTypeAdapter(TextObject.class, new GsonTextObjectFactory(failOnUnknownProps))
                 .registerTypeAdapter(ContextBlockElement.class, new GsonContextBlockElementFactory(failOnUnknownProps))
                 .registerTypeAdapter(BlockElement.class, new GsonBlockElementFactory(failOnUnknownProps))
                 .registerTypeAdapter(RichTextElement.class, new GsonRichTextElementFactory(failOnUnknownProps))
-                .registerTypeAdapter(MessageChangedEvent.PreviousMessage.class, new GsonMessageChangedEventPreviousMessageFactory(failOnUnknownProps))
-                .registerTypeAdapter(LogsResponse.DetailsChangedValue.class, new GsonAuditLogsDetailsChangedValueFactory(failOnUnknownProps))
+                .registerTypeAdapter(FunctionExecutedEvent.InputValue.class, new GsonFunctionExecutedEventInputValueFactory())
+                .registerTypeAdapter(Attachment.VideoHtml.class, new GsonMessageAttachmentVideoHtmlFactory(failOnUnknownProps))
                 .registerTypeAdapter(MessageChangedEvent.PreviousMessage.class, new GsonMessageChangedEventPreviousMessageFactory(failOnUnknownProps))
                 .registerTypeAdapter(AppWorkflow.StepInputValue.class, new GsonAppWorkflowStepInputValueFactory(failOnUnknownProps))
                 .registerTypeAdapter(AppWorkflow.StepInputValueElementDefault.class, new GsonAppWorkflowStepInputValueDefaultFactory(failOnUnknownProps))
                 .registerTypeAdapter(LogsResponse.DetailsChangedValue.class, new GsonAuditLogsDetailsChangedValueFactory(failOnUnknownProps))
                 .registerTypeAdapter(LogsResponse.UserIDs.class, new GsonAuditLogsDetailsUserIDsFactory(failOnUnknownProps));
-        if (failOnUnknownProps || config.isLibraryMaintainerMode()) {
-            gsonBuilder = gsonBuilder.registerTypeAdapterFactory(new UnknownPropertyDetectionAdapterFactory());
-        }
-        if (config.isPrettyResponseLoggingEnabled()) {
-            gsonBuilder = gsonBuilder.setPrettyPrinting();
-        }
-        return gsonBuilder.create();
     }
 }