format code

Signed-off-by: zane-neo <zaniu@amazon.com>

Author: zane-neo

common/src/main/java/org/opensearch/ml/common/connector/HttpConnector.java

@@ -196,10 +196,15 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             builder.field(PARAMETERS_FIELD, parameters);
         }
         if (credential != null) {
-            // Include the encrypted flag in the credential map for serialization
-            Map<String, String> credentialWithFlag = new HashMap<>(credential);
-            credentialWithFlag.put(ENCRYPTED_FIELD, String.valueOf(isEncrypted));
-            builder.field(CREDENTIAL_FIELD, credentialWithFlag);
+            // Only include the encrypted flag when isEncrypted is false to avoid document pollution
+            // and maintain backward compatibility with existing connectors
+            if (Boolean.FALSE.equals(isEncrypted)) {
+                Map<String, String> credentialWithFlag = new HashMap<>(credential);
+                credentialWithFlag.put(ENCRYPTED_FIELD, "false");
+                builder.field(CREDENTIAL_FIELD, credentialWithFlag);
+            } else {
+                builder.field(CREDENTIAL_FIELD, credential);
+            }
         }
         if (actions != null) {
             builder.field(ACTIONS_FIELD, actions);

common/src/test/java/org/opensearch/ml/common/connector/HttpConnectorTest.java

@@ -52,7 +52,7 @@ public class HttpConnectorTest {
 
     String TEST_CONNECTOR_JSON_STRING = "{\"name\":\"test_connector_name\",\"version\":\"1\","
         + "\"description\":\"this is a test connector\",\"protocol\":\"http\","
-        + "\"parameters\":{\"input\":\"test input value\"},\"credential\":{\"encrypted\":\"true\",\"key\":\"test_key_value\"},"
+        + "\"parameters\":{\"input\":\"test input value\"},\"credential\":{\"key\":\"test_key_value\"},"
         + "\"actions\":[{\"action_type\":\"PREDICT\",\"method\":\"POST\",\"url\":\"https://test.com\","
         + "\"headers\":{\"api_key\":\"${credential.key}\"},"
         + "\"request_body\":\"{\\\"input\\\": \\\"${parameters.input}\\\"}\","