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.client;
19
20
21 import com.google.common.annotations.VisibleForTesting;
22 import org.apache.hadoop.hbase.classification.InterfaceAudience;
23 import org.apache.hadoop.hbase.classification.InterfaceStability;
24
25 /**
26 * Provide a way to access the inner buffer.
27 * The purpose is to reduce the elapsed time to move a large number
28 * of elements between collections.
29 * @param <T>
30 */
31 @InterfaceAudience.Public
32 @InterfaceStability.Evolving
33 @VisibleForTesting
34 interface RowAccess<T> extends Iterable<T> {
35 /**
36 * @return true if there are no elements.
37 */
38 boolean isEmpty();
39
40 /**
41 * @return the number of elements in this list.
42 */
43 int size();
44 }