difin commented on code in PR #6655:
URL: https://github.com/apache/hive/pull/6655#discussion_r3786661770


##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/vended/GcsVendedCredentialHadoopMapper.java:
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@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.iceberg.mr.hive.vended;
+
+/** Maps Iceberg GCS FileIO properties to Hadoop Google Cloud Storage 
connector keys. */
+enum GcsVendedCredentialHadoopMapper implements VendedCredentialHadoopMapper {
+  INSTANCE;
+
+  static final String GCS_OAUTH2_TOKEN = "gcs.oauth2.token";
+  static final String GCS_OAUTH2_TOKEN_EXPIRES_AT = 
"gcs.oauth2.token-expires-at";
+  static final String GCS_PROJECT_ID = "gcs.project-id";
+  static final String GCS_SERVICE_HOST = "gcs.service.host";
+
+  @Override
+  public boolean supportsPrefix(String prefix) {
+    String scheme = VendedCredentialPrefixUtil.schemeFromPrefix(prefix);
+    return "gs".equals(scheme) || "gcs".equals(scheme);
+  }
+
+  @Override
+  public boolean supportsConfigKey(String icebergKey) {
+    return icebergKey.startsWith("gcs.");
+  }
+
+  @Override
+  public String scopeFromPrefix(String prefix) {
+    return VendedCredentialPrefixUtil.scopeFromPrefix(prefix);
+  }
+
+  @Override
+  public String toHadoopProperty(String bucket, String icebergKey) {
+    // The Google Cloud Storage Hadoop connector has no plain config key to 
inject a raw OAuth
+    // token; a vended token requires fs.gs.auth.type=ACCESS_TOKEN_PROVIDER 
plus an
+    // AccessTokenProvider implementation class. Until that is wired, 
gcs.oauth2.token and its
+    // expiry travel only in the serialized Iceberg StorageCredential blob and 
are consumed by
+    // Iceberg GCSFileIO. Only connectivity/config that maps to real connector 
keys is emitted.
+    return switch (icebergKey) {
+      case GCS_PROJECT_ID -> "fs.gs.project.id";

Review Comment:
   Done



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