/**
 * 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.hadoop.hive.ql.security.authorization.plugin.sqlstd;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hive.ql.parse.SemanticException;
import org.apache.hadoop.hive.ql.security.HiveAuthenticationProvider;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAccessControlException;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAuthorizationValidator;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAuthzContext;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAuthzPluginException;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveOperationType;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObject;

/**
 * A no-op HiveAuthorizationValidator for use from hive cli.
 */
public class DummyHiveAuthorizationValidator implements HiveAuthorizationValidator {

  public static final Logger LOG = LoggerFactory.getLogger(DummyHiveAuthorizationValidator.class);

  @Override
  public void checkPrivileges(HiveOperationType hiveOpType, List<HivePrivilegeObject> inputHObjs,
      List<HivePrivilegeObject> outputHObjs, HiveAuthzContext context)
      throws HiveAuthzPluginException, HiveAccessControlException {
    // no-op
  }

  @Override
  public List<HivePrivilegeObject> filterListCmdObjects(List<HivePrivilegeObject> listObjs,
      HiveAuthzContext context) {
    return listObjs;
  }


  @Override
  public boolean needTransform() {
    return false;
  }

  @Override
  public List<HivePrivilegeObject> applyRowFilterAndColumnMasking(HiveAuthzContext context,
      List<HivePrivilegeObject> privObjs) throws SemanticException {
    return null;
  }

}