1 /* 2 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.java.accessibility.util; 27 28 import java.awt.*; 29 import java.util.EventListener; 30 import javax.accessibility.*; 31 32 33 /** 34 * The GUIInitializedMulticaster class is used to maintain a list of 35 * GUIInitializedListener classes. It is intended to be used primarily 36 * for internal support in the EventQueueMonitor class, and is not intended 37 * to be used by classes outside the Java Accessibility Utility package. 38 * 39 * @see EventQueueMonitor 40 * @see EventQueueMonitor#addGUIInitializedListener 41 * @see EventQueueMonitor#removeGUIInitializedListener 42 * 43 */ 44 class GUIInitializedMulticaster 45 extends AWTEventMulticaster implements GUIInitializedListener 46 { 47 protected GUIInitializedMulticaster(EventListener a, EventListener b) { 48 super(a, b); 49 } 50 51 public void guiInitialized() { 52 ((GUIInitializedListener)a).guiInitialized(); 53 ((GUIInitializedListener)b).guiInitialized(); 54 } 55 56 public static GUIInitializedListener add(GUIInitializedListener a, GUIInitializedListener b) { 57 return (GUIInitializedListener)addInternal(a, b); 58 } 59 60 public static GUIInitializedListener remove(GUIInitializedListener l, GUIInitializedListener oldl) { 61 return (GUIInitializedListener)removeInternal(l, oldl); 62 } 63 64 protected static EventListener addInternal(EventListener a, EventListener b) { 65 if (a == null) return b; 66 if (b == null) return a; 67 return new GUIInitializedMulticaster(a, b); 68 } 69 70 protected static EventListener removeInternal(EventListener l, EventListener oldl) { 71 if (l == oldl || l == null) { 72 return null; 73 } else if (l instanceof GUIInitializedMulticaster) { 74 return ((GUIInitializedMulticaster)l).remove(oldl); 75 } else { 76 return l; // it's not here 77 } 78 } 79 80 }