+++ /dev/null
-/* 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 <tromey@cygnus.com>
- * @author Aaron M. Renn (arenn@urbanophile.com)
- * @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;
- }
-
- private static BreakIterator getInstance (String type, Locale loc)
- {
- String className;
- try
- {
- ResourceBundle res
- = ResourceBundle.getBundle("gnu.java.locale.LocaleInformation",
- loc);
- className = res.getString(type);
- }
- catch (MissingResourceException x)
- {
- return null;
- }
- try
- {
- Class k = Class.forName(className);
- return (BreakIterator) k.newInstance();
- }
- catch (ClassNotFoundException x1)
- {
- return null;
- }
- catch (InstantiationException x2)
- {
- return null;
- }
- catch (IllegalAccessException x3)
- {
- return null;
- }
- }
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over characters as defined in the default locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getCharacterInstance ()
- {
- return getCharacterInstance (Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over characters as defined in the specified locale. If the
- * desired locale is not available, the default locale is used.
- *
- * @param locale The desired locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getCharacterInstance (Locale loc)
- {
- BreakIterator r = getInstance ("CharacterIterator", loc);
- if (r == null)
- r = new gnu.java.text.CharacterBreakIterator ();
- return r;
- }
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over line breaks as defined in the default locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getLineInstance ()
- {
- return getLineInstance (Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over line breaks as defined in the specified locale. If the
- * desired locale is not available, the default locale is used.
- *
- * @param locale The desired locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getLineInstance (Locale loc)
- {
- BreakIterator r = getInstance ("LineIterator", loc);
- if (r == null)
- r = new gnu.java.text.LineBreakIterator ();
- return r;
- }
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over sentences as defined in the default locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getSentenceInstance ()
- {
- return getSentenceInstance (Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over sentences as defined in the specified locale. If the
- * desired locale is not available, the default locale is used.
- *
- * @param locale The desired locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getSentenceInstance (Locale loc)
- {
- BreakIterator r = getInstance ("SentenceIterator", loc);
- if (r == null)
- r = new gnu.java.text.SentenceBreakIterator ();
- return r;
- }
-
- /**
- * This method returns the text this object is iterating over as a
- * <code>CharacterIterator</code>.
- *
- * @param The text being iterated over.
- */
- public abstract CharacterIterator getText ();
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over words as defined in the default locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getWordInstance ()
- {
- return getWordInstance (Locale.getDefault());
- }
-
- /**
- * This method returns an instance of <code>BreakIterator</code> that will
- * iterate over words as defined in the specified locale. If the
- * desired locale is not available, the default locale is used.
- *
- * @param locale The desired locale.
- *
- * @return A <code>BreakIterator</code> instance for the default locale.
- */
- public static BreakIterator getWordInstance (Locale loc)
- {
- BreakIterator r = getInstance ("WordIterator", loc);
- if (r == null)
- r = new gnu.java.text.WordBreakIterator ();
- return r;
- }
-
- /**
- * This method tests whether or not the specified position is a text
- * element boundary.
- *
- * @param offset The text position to test.
- *
- * @return <code>true</code> if the position is a boundary,
- * <code>false</code> otherwise.
- */
- public boolean isBoundary (int pos)
- {
- if (pos == 0)
- return true;
- return following (pos - 1) == pos;
- }
-
- /**
- * This method returns the last text element boundary in the text being
- * iterated over.
- *
- * @return The last text boundary.
- */
- public abstract int last ();
-
- /**
- * This method returns the text element boundary following the current
- * text position.
- *
- * @return The next text boundary.
- */
- public abstract int next ();
-
- /**
- * This method returns the n'th text element boundary following the current
- * text position.
- *
- * @param n The number of text element boundaries to skip.
- *
- * @return The next text boundary.
- */
- public abstract int next (int n);
-
- /**
- * This methdod returns the offset of the text element boundary preceding
- * the specified offset.
- *
- * @param offset The text index from which to find the preceding
- * text boundary.
- *
- * @returns The next text boundary preceding the specified index.
- */
- public int preceding (int pos)
- {
- if (following (pos) == DONE)
- last ();
- while (previous () >= pos)
- ;
- return current ();
- }
-
- /**
- * This method returns the text element boundary preceding the current
- * text position.
- *
- * @return The previous text boundary.
- */
- public abstract int previous ();
-
- /**
- * This method sets the text string to iterate over.
- *
- * @param str The <code>String</code> to iterate over.
- */
- public void setText (String newText)
- {
- setText (new StringCharacterIterator (newText));
- }
-
- /**
- * This method sets the text to iterate over from the specified
- * <code>CharacterIterator</code>.
- *
- * @param ci The desired <code>CharacterIterator</code>.
- */
- public abstract void setText (CharacterIterator newText);
-}
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