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.merge.result;
19
20 import java.io.InputStream;
21 import java.io.Reader;
22 import java.sql.SQLException;
23 import java.util.Calendar;
24
25 /**
26 * Merged result after merge engine.
27 */
28 public interface MergedResult {
29
30 /**
31 * Iterate next data.
32 *
33 * @return has next data
34 * @throws SQLException SQL exception
35 */
36 boolean next() throws SQLException;
37
38 /**
39 * Get data value.
40 *
41 * @param columnIndex column index
42 * @param type class type of data value
43 * @return data value
44 * @throws SQLException SQL exception
45 */
46 Object getValue(int columnIndex, Class<?> type) throws SQLException;
47
48 /**
49 * Get calendar value.
50 *
51 * @param columnIndex column index
52 * @param type class type of data value
53 * @param calendar calendar
54 * @return calendar value
55 * @throws SQLException SQL exception
56 */
57 Object getCalendarValue(int columnIndex, Class<?> type, Calendar calendar) throws SQLException;
58
59 /**
60 * Get InputStream.
61 *
62 * @param columnIndex column index
63 * @param type class type of data value
64 * @return InputStream
65 * @throws SQLException SQL exception
66 */
67 InputStream getInputStream(int columnIndex, String type) throws SQLException;
68
69 /**
70 * Get CharacterStream.
71 *
72 * @param columnIndex column index
73 * @return Reader
74 * @throws SQLException SQL exception
75 */
76 Reader getCharacterStream(int columnIndex) throws SQLException;
77
78 /**
79 * Judge ResultSet is null or not.
80 *
81 * @return ResultSet is null or not
82 * @throws SQLException SQL exception
83 */
84 boolean wasNull() throws SQLException;
85 }