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.mapreduce;
19 
20 import java.io.IOException;
21 import java.util.List;
22 
23 import org.apache.hadoop.hbase.classification.InterfaceAudience;
24 import org.apache.hadoop.hbase.classification.InterfaceStability;
25 import org.apache.hadoop.conf.Configurable;
26 import org.apache.hadoop.hbase.Tag;
27 
28 /**
29  * Interface to convert visibility expressions into Tags for storing along with Cells in HFiles.
30  */
31 @InterfaceAudience.Public
32 @InterfaceStability.Evolving
33 public interface VisibilityExpressionResolver extends Configurable {
34 
35   /**
36    * Giving a chance for the initialization.
37    */
init()38   void init();
39 
40   /**
41    * Convert visibility expression into tags to be serialized.
42    * @param visExpression the label expression
43    * @return The list of tags corresponds to the visibility expression. These tags will be stored
44    *         along with the Cells.
45    */
createVisibilityExpTags(String visExpression)46   List<Tag> createVisibilityExpTags(String visExpression) throws IOException;
47 }
48