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21 package org.apache.hadoop.hbase.hbql.index;
22
23 import org.apache.hadoop.hbase.client.tableindexed.IndexSpecification;
24 import org.apache.hadoop.hbase.client.tableindexed.SimpleIndexKeyGenerator;
25 import org.apache.hadoop.hbase.hbql.client.HBqlException;
26 import org.apache.hadoop.hbase.hbql.client.Util;
27
28 import java.util.List;
29
30 public class SingleColumnIndex extends IndexSpecification {
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32
33 private SingleColumnIndex(final String indexName,
34 final byte[][] indexedColumns,
35 final byte[][] additionalColumns) {
36 super(indexName, indexedColumns, additionalColumns, new SimpleIndexKeyGenerator(indexedColumns[0]));
37 }
38
39 public static SingleColumnIndex newIndex(final String indexName,
40 final List<String> indexList,
41 final List<String> includeList) throws HBqlException {
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43 if (indexList.size() != 1)
44 throw new HBqlException("Invalid index " + indexName + ". Only single column indexes allowed.");
45
46 return new SingleColumnIndex(indexName,
47 Util.getStringsAsBytes(indexList),
48 Util.getStringsAsBytes(includeList));
49 }
50 }