1/*
2 * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25/*
26 *******************************************************************************
27 * Copyright (C) 2009, International Business Machines Corporation and         *
28 * others. All Rights Reserved.                                                *
29 *******************************************************************************
30 */
31package sun.util.locale;
32
33public class StringTokenIterator {
34    private String text;
35    private String dlms;        // null if a single char delimiter
36    private char delimiterChar; // delimiter if a single char delimiter
37
38    private String token;
39    private int start;
40    private int end;
41    private boolean done;
42
43    public StringTokenIterator(String text, String dlms) {
44        this.text = text;
45        if (dlms.length() == 1) {
46            delimiterChar = dlms.charAt(0);
47        } else {
48            this.dlms = dlms;
49        }
50        setStart(0);
51    }
52
53    public String first() {
54        setStart(0);
55        return token;
56    }
57
58    public String current() {
59        return token;
60    }
61
62    public int currentStart() {
63        return start;
64    }
65
66    public int currentEnd() {
67        return end;
68    }
69
70    public boolean isDone() {
71        return done;
72    }
73
74    public String next() {
75        if (hasNext()) {
76            start = end + 1;
77            end = nextDelimiter(start);
78            token = text.substring(start, end);
79        } else {
80            start = end;
81            token = null;
82            done = true;
83        }
84        return token;
85    }
86
87    public boolean hasNext() {
88        return (end < text.length());
89    }
90
91    public StringTokenIterator setStart(int offset) {
92        if (offset > text.length()) {
93            throw new IndexOutOfBoundsException();
94        }
95        start = offset;
96        end = nextDelimiter(start);
97        token = text.substring(start, end);
98        done = false;
99        return this;
100    }
101
102    public StringTokenIterator setText(String text) {
103        this.text = text;
104        setStart(0);
105        return this;
106    }
107
108    private int nextDelimiter(int start) {
109        int textlen = this.text.length();
110        if (dlms == null) {
111            for (int idx = start; idx < textlen; idx++) {
112                if (text.charAt(idx) == delimiterChar) {
113                    return idx;
114                }
115            }
116        } else {
117            int dlmslen = dlms.length();
118            for (int idx = start; idx < textlen; idx++) {
119                char c = text.charAt(idx);
120                for (int i = 0; i < dlmslen; i++) {
121                    if (c == dlms.charAt(i)) {
122                        return idx;
123                    }
124                }
125            }
126        }
127        return textlen;
128    }
129}
130