clean up TextTranslationClientBuilder

Author: Jiarui Guo

sdk/translation/azure-ai-translation-text/src/main/java/com/azure/ai/translation/text/TextTranslationClientBuilder.java

@@ -209,15 +209,13 @@ public TextTranslationClientBuilder configuration(Configuration configuration) {
     @Generated
     private String endpoint;
 
-    private Boolean isCustomEndpoint = false;
-
     /**
      * {@inheritDoc}.
      */
+    @Generated
     @Override
     public TextTranslationClientBuilder endpoint(String endpoint) {
         this.endpoint = endpoint;
-        this.isCustomEndpoint = CustomEndpointUtils.isPlatformHost(endpoint);
         return this;
     }
 
@@ -264,6 +262,7 @@ public TextTranslationClientBuilder retryPolicy(RetryPolicy retryPolicy) {
      * @return The updated {@link TextTranslationClientBuilder} object.
      * @throws NullPointerException If {@code credential} is null.
      */
+    @Override
     public TextTranslationClientBuilder credential(KeyCredential credential) {
         Objects.requireNonNull(credential, "'credential' cannot be null.");
         this.credential = credential;
@@ -318,6 +317,7 @@ public TextTranslationClientBuilder audience(TextTranslationAudience audience) {
      * @return The updated {@link TextTranslationClientBuilder} object.
      * @throws NullPointerException If {@code tokenCredential} is null.
      */
+    @Override
     public TextTranslationClientBuilder credential(TokenCredential tokenCredential) {
         Objects.requireNonNull(tokenCredential, "'tokenCredential' cannot be null.");
         this.tokenCredential = tokenCredential;
@@ -336,7 +336,7 @@ private TextTranslationClientImpl buildInnerClient() {
         String serviceEndpoint;
         if (this.endpoint == null) {
             serviceEndpoint = "https://api.cognitive.microsofttranslator.com";
-        } else if (this.isCustomEndpoint) {
+        } else if (CustomEndpointUtils.isPlatformHost(endpoint)) {
             try {
                 URL hostUri = new URL(endpoint);
                 URL fullUri = new URL(hostUri, "/translator/text/v" + localServiceVersion.getVersion());
@@ -345,7 +345,7 @@ private TextTranslationClientImpl buildInnerClient() {
                 serviceEndpoint = endpoint;
             }
         } else {
-            serviceEndpoint = endpoint;
+            serviceEndpoint = this.endpoint;
         }
         if (tokenCredential != null && (this.region != null || this.resourceId != null)) {
             Objects.requireNonNull(this.region, "'region' cannot be null.");