package textbender.o.swing; // Copyright 2003-2005, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Textbender Software"), to deal in the Textbender Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Textbender Software, and to permit persons to whom the Textbender Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Textbender Software. THE TEXTBENDER SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE TEXTBENDER SOFTWARE OR THE USE OR OTHER DEALINGS IN THE TEXTBENDER SOFTWARE.

import javax.swing.ListModel;
import javax.swing.event.*;


/** ListModel utilities and common implementations.
  */
public final class ListModelX
{

    private ListModelX() {}



    /** Immediately calls listener.intervalAdded(), if necessary,
      * to bring the listener up to date with the current state of the specified list model.
      *
      *     @param listModel source
      *     @param listener to fire up
      */
    public static void fireUp( ListModel listModel, ListDataListener listener )
    {
        assert java.awt.EventQueue.isDispatchThread();
        final int n = listModel.getSize();
        if( n > 0 )
        {
            listener.intervalAdded
                ( new ListDataEvent( listModel, ListDataEvent.INTERVAL_ADDED, 0, n - 1 ));
        }
    }



    /** A null list model. Thread safe.
      */
    public static final ListModel nullModel = new ListModel()
    {
        public void addListDataListener( ListDataListener l ) {}
        public Object getElementAt( int index ) { throw new IndexOutOfBoundsException(); }
        public int getSize() { return 0; }
        public void removeListDataListener( ListDataListener l ) {}
    };



}