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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.security.visibility;
19  
20  import java.util.List;
21  
22  import org.apache.hadoop.classification.InterfaceAudience;
23  import org.apache.hadoop.conf.Configuration;
24  import org.apache.hadoop.hbase.security.User;
25  
26  /**
27   * This is a simple implementation for ScanLabelGenerator. It will just extract labels passed via
28   * Scan#Authorizations.
29   */
30  @InterfaceAudience.Private
31  public class SimpleScanLabelGenerator implements ScanLabelGenerator {
32  
33    private Configuration conf;
34  
35    @Override
36    public void setConf(Configuration conf) {
37      this.conf = conf;
38    }
39  
40    @Override
41    public Configuration getConf() {
42      return this.conf;
43    }
44  
45    @Override
46    public List<String> getLabels(User user, Authorizations authorizations) {
47      if (authorizations != null) {
48        return authorizations.getLabels();
49      }
50      return null;
51    }
52  }