Initial revision

From-SVN: r102074

libjava/classpath/gnu/java/text/BaseBreakIterator.java

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+/* BaseBreakIterator.java -- Base class for default BreakIterators
+   Copyright (C) 1999, 2001, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 gnu.java.text;
+
+import java.text.BreakIterator;
+import java.text.CharacterIterator;
+import java.text.StringCharacterIterator;
+
+/**
+ * @author Tom Tromey <tromey@cygnus.com>
+ * @date March 22, 1999
+ */
+
+public abstract class BaseBreakIterator extends BreakIterator
+{
+  public BaseBreakIterator ()
+  {
+    // It isn't documented, but break iterators are created in a
+    // working state; their methods won't throw exceptions before
+    // setText().
+    iter = new StringCharacterIterator("");
+  }
+
+  public int current ()
+  {
+    return iter.getIndex();
+  }
+
+  public int first ()
+  {
+    iter.first();
+    return iter.getBeginIndex();
+  }
+
+  public int following (int pos)
+  {
+    int save = iter.getIndex();
+    iter.setIndex(pos);
+    int r = next ();
+    iter.setIndex(save);
+    return r;
+  }
+
+  public CharacterIterator getText ()
+  {
+    return iter;
+  }
+
+  public int last ()
+  {
+    iter.last();
+    // Go past the last character.
+    iter.next();
+    return iter.getEndIndex();
+  }
+
+  public int next (int n)
+  {
+    int r = iter.getIndex ();
+    if (n > 0)
+      {
+	while (n > 0 && r != DONE)
+	  {
+	    r = next ();
+	    --n;
+	  }
+      }
+    else if (n < 0)
+      {
+	while (n < 0 && r != DONE)
+	  {
+	    r = previous ();
+	    ++n;
+	  }
+      }
+    return r;
+  }
+
+  public void setText (CharacterIterator newText)
+  {
+    iter = newText;
+  }
+
+  protected CharacterIterator iter;
+}