Source for gnu.java.text.BaseBreakIterator

   1: /* BaseBreakIterator.java -- Base class for default BreakIterators
   2:    Copyright (C) 1999, 2001, 2004 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.text;
  40: 
  41: import java.text.BreakIterator;
  42: import java.text.CharacterIterator;
  43: import java.text.StringCharacterIterator;
  44: 
  45: /**
  46:  * @author Tom Tromey <tromey@cygnus.com>
  47:  * @date March 22, 1999
  48:  */
  49: 
  50: public abstract class BaseBreakIterator extends BreakIterator
  51: {
  52:   public BaseBreakIterator ()
  53:   {
  54:     // It isn't documented, but break iterators are created in a
  55:     // working state; their methods won't throw exceptions before
  56:     // setText().
  57:     iter = new StringCharacterIterator("");
  58:   }
  59: 
  60:   public int current ()
  61:   {
  62:     return iter.getIndex();
  63:   }
  64: 
  65:   public int first ()
  66:   {
  67:     iter.first();
  68:     return iter.getBeginIndex();
  69:   }
  70: 
  71:   /**
  72:    * Return the first boundary after <code>pos</code>.
  73:    * This has the side effect of setting the index of the
  74:    * CharacterIterator.
  75:    */
  76:   public int following (int pos)
  77:   {
  78:     iter.setIndex(pos);
  79:     int r = next ();
  80:     return r;
  81:   }
  82: 
  83:   public CharacterIterator getText ()
  84:   {
  85:     return iter;
  86:   }
  87: 
  88:   public int last ()
  89:   {
  90:     iter.last();
  91:     // Go past the last character.
  92:     iter.next();
  93:     return iter.getEndIndex();
  94:   }
  95: 
  96:   public int next (int n)
  97:   {
  98:     int r = iter.getIndex ();
  99:     if (n > 0)
 100:       {
 101:         while (n > 0 && r != DONE)
 102:           {
 103:             r = next ();
 104:             --n;
 105:           }
 106:       }
 107:     else if (n < 0)
 108:       {
 109:         while (n < 0 && r != DONE)
 110:           {
 111:             r = previous ();
 112:             ++n;
 113:           }
 114:       }
 115:     return r;
 116:   }
 117: 
 118:   public void setText (CharacterIterator newText)
 119:   {
 120:     iter = newText;
 121:   }
 122: 
 123:   protected CharacterIterator iter;
 124: }