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