update

arithmetic1728 · arithmetic1728 · commit 57f206fdd516 · 2021-03-03T11:18:53.000-08:00
diff --git a/gax/src/main/java/com/google/api/gax/rpc/mtls/ContextAwareMetadataJson.java b/gax/src/main/java/com/google/api/gax/rpc/mtls/ContextAwareMetadataJson.java
@@ -33,12 +33,18 @@
 import com.google.api.client.json.GenericJson;
 import com.google.api.client.util.Key;
 import com.google.api.core.BetaApi;
+import com.google.common.collect.ImmutableList;
 import java.util.List;
 
 /** Data class representing context_aware_metadata.json file. */
 @BetaApi
 public class ContextAwareMetadataJson extends GenericJson {
   /** Cert provider command */
   @Key("cert_provider_command")
-  public List<String> commands;
+  private List<String> commands;
+
+  /** Returns the cert provider command. */
+  public final ImmutableList<String> getCommands() {
+    return ImmutableList.copyOf(commands);
+  }
 }
diff --git a/gax/src/main/java/com/google/api/gax/rpc/mtls/MtlsProvider.java b/gax/src/main/java/com/google/api/gax/rpc/mtls/MtlsProvider.java
@@ -35,6 +35,7 @@
 import com.google.api.client.util.SecurityUtils;
 import com.google.api.core.BetaApi;
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.ImmutableList;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -159,11 +160,11 @@ static KeyStore getKeyStore(InputStream metadata, ProcessProvider processProvide
   }
 
   @VisibleForTesting
-  static List<String> extractCertificateProviderCommand(InputStream contextAwareMetadata)
+  static ImmutableList<String> extractCertificateProviderCommand(InputStream contextAwareMetadata)
       throws IOException {
     JsonParser parser = new GsonFactory().createJsonParser(contextAwareMetadata);
     ContextAwareMetadataJson json = parser.parse(ContextAwareMetadataJson.class);
-    return json.commands;
+    return json.getCommands();
   }
 
   @VisibleForTesting
