1 package org.sentrysoftware.jawk.jrt;
2
3 /*-
4 * ╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲
5 * Jawk
6 * ჻჻჻჻჻჻
7 * Copyright (C) 2006 - 2023 Sentry Software
8 * ჻჻჻჻჻჻
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation, either version 3 of the
12 * License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Lesser Public License for more details.
18 *
19 * You should have received a copy of the GNU General Lesser Public
20 * License along with this program. If not, see
21 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
22 * ╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱
23 */
24
25 import java.util.Enumeration;
26
27 /**
28 * Similar to StringTokenizer, except that tokens are characters
29 * in the input string themselves.
30 * <p>
31 * For Jawk, this class is used when NF == "".
32 *
33 * @author Danny Daglas
34 */
35 public class CharacterTokenizer implements Enumeration<Object> {
36
37 private String input;
38 private int idx = 0;
39
40 /**
41 * Construct a CharacterTokenizer.
42 *
43 * @param input The input string to tokenize.
44 */
45 public CharacterTokenizer(String input) {
46 this.input = input;
47 }
48
49 /** {@inheritDoc} */
50 @Override
51 public boolean hasMoreElements() {
52 return idx < input.length();
53 }
54
55 /** {@inheritDoc} */
56 @Override
57 public Object nextElement() {
58 return Character.toString(input.charAt(idx++));
59 }
60 }