--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/javax/swing/AbstractListModel.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,221 @@
+/*
+ * Copyright 1997-2004 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.*;
+import java.io.Serializable;
+import java.util.EventListener;
+
+/**
+ * The abstract definition for the data model that provides
+ * a <code>List</code> with its contents.
+ * <p>
+ * <strong>Warning:</strong>
+ * Serialized objects of this class will not be compatible with
+ * future Swing releases. The current serialization support is
+ * appropriate for short term storage or RMI between applications running
+ * the same version of Swing. As of 1.4, support for long term storage
+ * of all JavaBeans<sup><font size="-2">TM</font></sup>
+ * has been added to the <code>java.beans</code> package.
+ * Please see {@link java.beans.XMLEncoder}.
+ *
+ * @author Hans Muller
+ */
+public abstract class AbstractListModel implements ListModel, Serializable
+{
+ protected EventListenerList listenerList = new EventListenerList();
+
+
+ /**
+ * 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
+ */
+ public void addListDataListener(ListDataListener l) {
+ listenerList.add(ListDataListener.class, 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
+ */
+ public void removeListDataListener(ListDataListener l) {
+ listenerList.remove(ListDataListener.class, l);
+ }
+
+
+ /**
+ * Returns an array of all the list data listeners
+ * registered on this <code>AbstractListModel</code>.
+ *
+ * @return all of this model's <code>ListDataListener</code>s,
+ * or an empty array if no list data listeners
+ * are currently registered
+ *
+ * @see #addListDataListener
+ * @see #removeListDataListener
+ *
+ * @since 1.4
+ */
+ public ListDataListener[] getListDataListeners() {
+ return (ListDataListener[])listenerList.getListeners(
+ ListDataListener.class);
+ }
+
+
+ /**
+ * <code>AbstractListModel</code> subclasses must call this method
+ * <b>after</b>
+ * one or more elements of the list change. The changed elements
+ * are specified by the closed interval index0, index1 -- the endpoints
+ * are included. Note that
+ * index0 need not be less than or equal to index1.
+ *
+ * @param source the <code>ListModel</code> that changed, typically "this"
+ * @param index0 one end of the new interval
+ * @param index1 the other end of the new interval
+ * @see EventListenerList
+ * @see DefaultListModel
+ */
+ protected void fireContentsChanged(Object source, int index0, int index1)
+ {
+ Object[] listeners = listenerList.getListenerList();
+ ListDataEvent e = null;
+
+ for (int i = listeners.length - 2; i >= 0; i -= 2) {
+ if (listeners[i] == ListDataListener.class) {
+ if (e == null) {
+ e = new ListDataEvent(source, ListDataEvent.CONTENTS_CHANGED, index0, index1);
+ }
+ ((ListDataListener)listeners[i+1]).contentsChanged(e);
+ }
+ }
+ }
+
+
+ /**
+ * <code>AbstractListModel</code> subclasses must call this method
+ * <b>after</b>
+ * one or more elements are added to the model. The new elements
+ * are specified by a closed interval index0, index1 -- the enpoints
+ * are included. Note that
+ * index0 need not be less than or equal to index1.
+ *
+ * @param source the <code>ListModel</code> that changed, typically "this"
+ * @param index0 one end of the new interval
+ * @param index1 the other end of the new interval
+ * @see EventListenerList
+ * @see DefaultListModel
+ */
+ protected void fireIntervalAdded(Object source, int index0, int index1)
+ {
+ Object[] listeners = listenerList.getListenerList();
+ ListDataEvent e = null;
+
+ for (int i = listeners.length - 2; i >= 0; i -= 2) {
+ if (listeners[i] == ListDataListener.class) {
+ if (e == null) {
+ e = new ListDataEvent(source, ListDataEvent.INTERVAL_ADDED, index0, index1);
+ }
+ ((ListDataListener)listeners[i+1]).intervalAdded(e);
+ }
+ }
+ }
+
+
+ /**
+ * <code>AbstractListModel</code> subclasses must call this method
+ * <b>after</b> one or more elements are removed from the model.
+ * <code>index0</code> and <code>index1</code> are the end points
+ * of the interval that's been removed. Note that <code>index0</code>
+ * need not be less than or equal to <code>index1</code>.
+ *
+ * @param source the <code>ListModel</code> that changed, typically "this"
+ * @param index0 one end of the removed interval,
+ * including <code>index0</code>
+ * @param index1 the other end of the removed interval,
+ * including <code>index1</code>
+ * @see EventListenerList
+ * @see DefaultListModel
+ */
+ protected void fireIntervalRemoved(Object source, int index0, int index1)
+ {
+ Object[] listeners = listenerList.getListenerList();
+ ListDataEvent e = null;
+
+ for (int i = listeners.length - 2; i >= 0; i -= 2) {
+ if (listeners[i] == ListDataListener.class) {
+ if (e == null) {
+ e = new ListDataEvent(source, ListDataEvent.INTERVAL_REMOVED, index0, index1);
+ }
+ ((ListDataListener)listeners[i+1]).intervalRemoved(e);
+ }
+ }
+ }
+
+ /**
+ * Returns an array of all the objects currently registered as
+ * <code><em>Foo</em>Listener</code>s
+ * upon this model.
+ * <code><em>Foo</em>Listener</code>s
+ * are registered using the <code>add<em>Foo</em>Listener</code> method.
+ * <p>
+ * You can specify the <code>listenerType</code> argument
+ * with a class literal, such as <code><em>Foo</em>Listener.class</code>.
+ * For example, you can query a list model
+ * <code>m</code>
+ * for its list data listeners
+ * with the following code:
+ *
+ * <pre>ListDataListener[] ldls = (ListDataListener[])(m.getListeners(ListDataListener.class));</pre>
+ *
+ * If no such listeners exist,
+ * this method returns an empty array.
+ *
+ * @param listenerType the type of listeners requested;
+ * this parameter should specify an interface
+ * that descends from <code>java.util.EventListener</code>
+ * @return an array of all objects registered as
+ * <code><em>Foo</em>Listener</code>s
+ * on this model,
+ * or an empty array if no such
+ * listeners have been added
+ * @exception ClassCastException if <code>listenerType</code> doesn't
+ * specify a class or interface that implements
+ * <code>java.util.EventListener</code>
+ *
+ * @see #getListDataListeners
+ *
+ * @since 1.3
+ */
+ public <T extends EventListener> T[] getListeners(Class<T> listenerType) {
+ return listenerList.getListeners(listenerType);
+ }
+}