1 /*
2 * This file is part of *** M y C o R e ***
3 * See http://www.mycore.de/ for details.
4 *
5 * MyCoRe is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * MyCoRe is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with MyCoRe. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 package org.mycore.frontend.cli;
20
21 import java.io.BufferedReader;
22 import java.io.IOException;
23 import java.io.InputStreamReader;
24 import java.nio.charset.Charset;
25
26 /**
27 * Reads the next command entered at the stdin prompt.
28 *
29 * @author Frank L\u00FCtzenkirchen
30 */
31 public class MCRCommandPrompt {
32
33 private BufferedReader console;
34
35 private String systemName;
36
37 public MCRCommandPrompt(String systemName) {
38 this.systemName = systemName;
39 this.console = new BufferedReader(new InputStreamReader(System.in, Charset.defaultCharset()));
40 }
41
42 public String readCommand() {
43 String line = "";
44 do {
45 line = readLine();
46 } while (line.isEmpty());
47 return line;
48 }
49
50 private String readLine() {
51 System.out.print(systemName + "> ");
52
53 try {
54 String input = console.readLine();
55 if (input != null) {
56 return input.trim().replaceAll("\\s+", " ");
57 } else {
58 /* input stream closed (EOF), shutdown */
59 System.out.println("quit");
60 return "quit";
61 }
62 } catch (IOException ignored) {
63 return "";
64 }
65 }
66
67 }