1 package fr.ifremer.quadrige2.core.action;
2
3 /*-
4 * #%L
5 * Quadrige2 Core :: Quadrige2 Core Shared
6 * $Id:$
7 * $HeadURL:$
8 * %%
9 * Copyright (C) 2017 Ifremer
10 * %%
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU Affero General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU Affero General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 * #L%
24 */
25
26
27
28 import org.apache.commons.lang3.StringUtils;
29
30 import java.util.Scanner;
31
32 /**
33 * <p>CommandLines class.</p>
34 */
35 public class CommandLines {
36
37 /**
38 * <p>Constructor for CommandLines.</p>
39 */
40 protected CommandLines() {
41
42 }
43
44 /**
45 * <p>readNotBlankInput.</p>
46 *
47 * @param message a {@link java.lang.String} object.
48 * @return a {@link java.lang.String} object.
49 */
50 public static String readNotBlankInput(String message) {
51 return readInput(message, null, true);
52 }
53
54 /**
55 * <p>readInput.</p>
56 *
57 * @param message a {@link java.lang.String} object.
58 * @param defaultValue a {@link java.lang.String} object.
59 * @param mandatory a boolean.
60 * @return a {@link java.lang.String} object.
61 */
62 public static String readInput(String message, String defaultValue, boolean mandatory) {
63
64 Scanner scanIn = new Scanner(System.in);
65 String inputValue = null;
66 while (inputValue == null) {
67 System.out.print(message.trim());
68 if (StringUtils.isNotEmpty(defaultValue)) {
69 System.out.print(String.format(" [%s]", defaultValue));
70 }
71 System.out.print(": ");
72 inputValue = scanIn.nextLine();
73 if (StringUtils.isBlank(inputValue)) {
74 // A default exists: use it
75 if (StringUtils.isNotEmpty(defaultValue)) {
76 inputValue = defaultValue;
77 }
78 // No default value, but mandatory: prepare for a new iteration
79 else if (mandatory) {
80 inputValue = null;
81 }
82 }
83 }
84 // scanIn.close();
85
86 return inputValue;
87 }
88
89 }