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 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.commons.csv;
21
22 /**
23 * Determines how duplicate header fields should be handled
24 * if {@link CSVFormat.Builder#setHeader(Class)} is not null.
25 *
26 * @since 1.10.0
27 */
28 public enum DuplicateHeaderMode {
29
30 /**
31 * Allows all duplicate headers.
32 */
33 ALLOW_ALL,
34
35 /**
36 * Allows duplicate headers only if they're empty, blank, or null strings.
37 */
38 ALLOW_EMPTY,
39
40 /**
41 * Disallows duplicate headers entirely.
42 */
43 DISALLOW
44 }