1 // BreakIterator.java - Iterate over logical breaks in text.
3 /* Copyright (C) 1999 Cygnus Solutions
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
13 import java.io.Serializable;
14 import java.util.Locale;
15 import java.util.MissingResourceException;
16 import java.util.ResourceBundle;
19 * @author Tom Tromey <tromey@cygnus.com>
20 * @date March 19, 1999
22 /* Written using "Java Class Libraries", 2nd edition, plus online
23 * API docs for JDK 1.2 beta from http://www.javasoft.com.
24 * Status: Believed complete and correct to 1.1.
27 public abstract class BreakIterator implements Cloneable, Serializable
29 // The value was discovered by writing a test program.
30 public static final int DONE = -1;
32 protected BreakIterator ()
36 public abstract int current ();
37 public abstract int first ();
38 public abstract int following (int pos);
40 public static synchronized Locale[] getAvailableLocales ()
46 private static BreakIterator getInstance (String type, Locale loc)
52 = ResourceBundle.getBundle("gnu.gcj.text.LocaleData", loc);
53 className = res.getString(type);
55 catch (MissingResourceException x)
61 Class k = Class.forName(className);
62 return (BreakIterator) k.newInstance();
64 catch (ClassNotFoundException x1)
68 catch (InstantiationException x2)
72 catch (IllegalAccessException x3)
78 public static BreakIterator getCharacterInstance ()
80 return getCharacterInstance (Locale.getDefault());
83 public static BreakIterator getCharacterInstance (Locale loc)
85 BreakIterator r = getInstance ("CharacterIterator", loc);
87 r = new gnu.gcj.text.CharacterBreakIterator ();
91 public static BreakIterator getLineInstance ()
93 return getLineInstance (Locale.getDefault());
96 public static BreakIterator getLineInstance (Locale loc)
98 BreakIterator r = getInstance ("LineIterator", loc);
100 r = new gnu.gcj.text.LineBreakIterator ();
104 public static BreakIterator getSentenceInstance ()
106 return getSentenceInstance (Locale.getDefault());
109 public static BreakIterator getSentenceInstance (Locale loc)
111 BreakIterator r = getInstance ("SentenceIterator", loc);
113 r = new gnu.gcj.text.SentenceBreakIterator ();
117 public abstract CharacterIterator getText ();
119 public static BreakIterator getWordInstance ()
121 return getWordInstance (Locale.getDefault());
124 public static BreakIterator getWordInstance (Locale loc)
126 BreakIterator r = getInstance ("WordIterator", loc);
128 r = new gnu.gcj.text.WordBreakIterator ();
132 public boolean isBoundary (int pos)
136 return following (pos - 1) == pos;
139 public abstract int last ();
140 public abstract int next ();
141 public abstract int next (int n);
143 public int preceding (int pos)
145 if (following (pos) == DONE)
147 while (previous () >= pos)
152 public abstract int previous ();
154 public void setText (String newText)
156 setText (new StringCharacterIterator (newText));
159 public abstract void setText (CharacterIterator newText);