001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.security.visibility;
019
020import java.util.ArrayList;
021import java.util.List;
022
023import org.apache.yetus.audience.InterfaceAudience;
024import org.apache.hadoop.conf.Configuration;
025import org.apache.hadoop.hbase.security.User;
026
027// Strictly removes a specified label
028@InterfaceAudience.Private
029public class LabelFilteringScanLabelGenerator implements ScanLabelGenerator {
030
031  public static String labelToFilter = null;
032
033  @Override
034  public Configuration getConf() {
035    return null;
036  }
037
038  @Override
039  public void setConf(Configuration conf) {
040
041  }
042
043  @Override
044  public List<String> getLabels(User user, Authorizations authorizations) {
045    if (authorizations != null) {
046      if (labelToFilter == null) return authorizations.getLabels();
047      List<String> newAuths = new ArrayList<>();
048      for (String auth : authorizations.getLabels()) {
049        if (!labelToFilter.equals(auth)) newAuths.add(auth);
050      }
051      return newAuths;
052    }
053    return null;
054  }
055}