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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.arrow.adapter.jdbc.consumer; | |
19 | ||
20 | import java.sql.ResultSet; | |
21 | import java.sql.SQLException; | |
22 | import java.sql.Timestamp; | |
23 | ||
24 | import org.apache.arrow.vector.TimeStampMilliVector; | |
25 | ||
26 | /** | |
27 | * Consumer which consume timestamp type values from {@link ResultSet}. | |
28 | * Write the data to {@link TimeStampMilliVector}. | |
29 | */ | |
30 | public abstract class TimestampConsumer { | |
31 | ||
32 | /** | |
33 | * Creates a consumer for {@link TimeStampMilliVector}. | |
34 | */ | |
35 | public static JdbcConsumer<TimeStampMilliVector> createConsumer( | |
36 | TimeStampMilliVector vector, int index, boolean nullable) { | |
37 | if (nullable) { | |
38 | return new NullableTimestampConsumer(vector, index); | |
39 | } else { | |
40 | return new NonNullableTimestampConsumer(vector, index); | |
41 | } | |
42 | } | |
43 | ||
44 | /** | |
45 | * Nullable consumer for timestamp. | |
46 | */ | |
47 | static class NullableTimestampConsumer extends BaseConsumer<TimeStampMilliVector> { | |
48 | ||
49 | /** | |
50 | * Instantiate a TimestampConsumer. | |
51 | */ | |
52 | public NullableTimestampConsumer(TimeStampMilliVector vector, int index) { | |
53 | super(vector, index); | |
54 | } | |
55 | ||
56 | @Override | |
57 | public void consume(ResultSet resultSet) throws SQLException { | |
58 | Timestamp timestamp = resultSet.getTimestamp(columnIndexInResultSet); | |
59 | if (!resultSet.wasNull()) { | |
60 | // for fixed width vectors, we have allocated enough memory proactively, | |
61 | // so there is no need to call the setSafe method here. | |
62 | vector.set(currentIndex, timestamp.getTime()); | |
63 | } | |
64 | currentIndex++; | |
65 | } | |
66 | } | |
67 | ||
68 | /** | |
69 | * Non-nullable consumer for timestamp. | |
70 | */ | |
71 | static class NonNullableTimestampConsumer extends BaseConsumer<TimeStampMilliVector> { | |
72 | ||
73 | /** | |
74 | * Instantiate a TimestampConsumer. | |
75 | */ | |
76 | public NonNullableTimestampConsumer(TimeStampMilliVector vector, int index) { | |
77 | super(vector, index); | |
78 | } | |
79 | ||
80 | @Override | |
81 | public void consume(ResultSet resultSet) throws SQLException { | |
82 | Timestamp timestamp = resultSet.getTimestamp(columnIndexInResultSet); | |
83 | // for fixed width vectors, we have allocated enough memory proactively, | |
84 | // so there is no need to call the setSafe method here. | |
85 | vector.set(currentIndex, timestamp.getTime()); | |
86 | currentIndex++; | |
87 | } | |
88 | } | |
89 | } |