| /* |
| * Copyright 1997-2001 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package javax.swing; |
| |
| import javax.swing.event.ListDataListener; |
| |
| /** |
| * This interface defines the methods components like JList use |
| * to get the value of each cell in a list and the length of the list. |
| * Logically the model is a vector, indices vary from 0 to |
| * ListDataModel.getSize() - 1. Any change to the contents or |
| * length of the data model must be reported to all of the |
| * ListDataListeners. |
| * |
| * @param <E> the type of the elements of this model |
| * |
| * @author Hans Muller |
| * @see JList |
| */ |
| public interface ListModel<E> |
| { |
| /** |
| * Returns the length of the list. |
| * @return the length of the list |
| */ |
| int getSize(); |
| |
| /** |
| * Returns the value at the specified index. |
| * @param index the requested index |
| * @return the value at <code>index</code> |
| */ |
| E getElementAt(int index); |
| |
| /** |
| * Adds a listener to the list that's notified each time a change |
| * to the data model occurs. |
| * @param l the <code>ListDataListener</code> to be added |
| */ |
| void addListDataListener(ListDataListener l); |
| |
| /** |
| * Removes a listener from the list that's notified each time a |
| * change to the data model occurs. |
| * @param l the <code>ListDataListener</code> to be removed |
| */ |
| void removeListDataListener(ListDataListener l); |
| } |