source: trunk/src/gcc/libjava/java/text/BreakIterator.java@ 1479

/* BreakIterator.java -- Breaks text into elements
   Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


package java.text;

import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * This class iterates over text elements such as words, lines, sentences,
 * and characters.  It can only iterate over one of these text elements at
 * a time.  An instance of this class configured for the desired iteration
 * type is created by calling one of the static factory methods, not
 * by directly calling a constructor.
 *
 * @author Tom Tromey <[email protected]>
 * @author Aaron M. Renn ([email protected])
 * @date March 19, 1999
 */
/* Written using "Java Class Libraries", 2nd edition, plus online
 * API docs for JDK 1.2 beta from http://www.javasoft.com.
 * Status:  Believed complete and correct to 1.1.
 */
public abstract class BreakIterator implements Cloneable
{
  /**
   * This value is returned by the <code>next()</code> and
   * <code>previous</code> in order to indicate that the end of the
   * text has been reached.
   */
  // The value was discovered by writing a test program.
  public static final int DONE = -1;

  /**
   * This method initializes a new instance of <code>BreakIterator</code>.
   * This protected constructor is available to subclasses as a default
   * no-arg superclass constructor.
   */
  protected BreakIterator ()
  {
  }

  /**
   * This method returns the index of the current text element boundary.
   *
   * @return The current text boundary.
   */
  public abstract int current ();

  /**
   * This method returns the first text element boundary in the text being
   * iterated over.
   *
   * @return The first text boundary.
   */
  public abstract int first ();

  /**
   * This methdod returns the offset of the text element boundary following
   * the specified offset.
   *
   * @param offset The text index from which to find the next text boundary.
   *
   * @param The next text boundary following the specified index.
   */
  public abstract int following (int pos);

  /**
   * This method returns a list of locales for which instances of
   * <code>BreakIterator</code> are available.
   *
   * @return A list of available locales
   */
  public static synchronized Locale[] getAvailableLocales ()
  {
    Locale[] l = new Locale[1];
    l[0] = Locale.US;
    return l;
  }