1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.shardingsphere.infra.algorithm.keygen.core;
19
20 import org.apache.shardingsphere.infra.algorithm.core.ShardingSphereAlgorithm;
21 import org.apache.shardingsphere.infra.algorithm.core.context.AlgorithmSQLContext;
22
23 import java.util.Collection;
24
25 /**
26 * Key generate algorithm.
27 */
28 public interface KeyGenerateAlgorithm extends ShardingSphereAlgorithm {
29
30 /**
31 * Generate keys.
32 *
33 * @param context algorithm SQL context
34 * @param keyGenerateCount key generate count
35 * @return generated keys
36 */
37 Collection<? extends Comparable<?>> generateKeys(AlgorithmSQLContext context, int keyGenerateCount);
38
39 /**
40 * Judge whether support auto increment or not.
41 *
42 * @return whether support auto increment or not
43 */
44 default boolean isSupportAutoIncrement() {
45 return false;
46 }
47 }