| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.beans.introspect; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.Collections; |
| import java.util.EventListener; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.TooManyListenersException; |
| import java.util.TreeMap; |
| |
| public final class EventSetInfo { |
| private MethodInfo add; |
| private MethodInfo remove; |
| private MethodInfo get; |
| |
| private EventSetInfo() { |
| } |
| |
| private boolean initialize() { |
| if ((this.add == null) || (this.remove == null) || (this.remove.type != this.add.type)) { |
| return false; |
| } |
| if ((this.get != null) && (this.get.type != this.add.type)) { |
| this.get = null; |
| } |
| return true; |
| } |
| |
| public Class<?> getListenerType() { |
| return this.add.type; |
| } |
| |
| public Method getAddMethod() { |
| return this.add.method; |
| } |
| |
| public Method getRemoveMethod() { |
| return this.remove.method; |
| } |
| |
| public Method getGetMethod() { |
| return (this.get == null) ? null : this.get.method; |
| } |
| |
| public boolean isUnicast() { |
| // if the adder method throws the TooManyListenersException |
| // then it is an Unicast event source |
| return this.add.isThrow(TooManyListenersException.class); |
| } |
| |
| private static MethodInfo getInfo(MethodInfo info, Method method, int prefix, int postfix) { |
| Class<?> type = (postfix > 0) |
| ? MethodInfo.resolve(method, method.getGenericReturnType()).getComponentType() |
| : MethodInfo.resolve(method, method.getGenericParameterTypes()[0]); |
| |
| if ((type != null) && EventListener.class.isAssignableFrom(type)) { |
| String name = method.getName(); |
| if (prefix + postfix < name.length()) { |
| if (type.getName().endsWith(name.substring(prefix, name.length() - postfix))) { |
| if ((info == null) || info.type.isAssignableFrom(type)) { |
| return new MethodInfo(method, type); |
| } |
| } |
| } |
| } |
| return info; |
| } |
| |
| private static EventSetInfo getInfo(Map<String,EventSetInfo> map, String key) { |
| EventSetInfo info = map.get(key); |
| if (info == null) { |
| info = new EventSetInfo(); |
| map.put(key, info); |
| } |
| return info; |
| } |
| |
| public static Map<String,EventSetInfo> get(Class<?> type) { |
| List<Method> methods = ClassInfo.get(type).getMethods(); |
| if (methods.isEmpty()) { |
| return Collections.emptyMap(); |
| } |
| Map<String,EventSetInfo> map = new TreeMap<>(); |
| for (Method method : ClassInfo.get(type).getMethods()) { |
| if (!Modifier.isStatic(method.getModifiers())) { |
| Class<?> returnType = method.getReturnType(); |
| String name = method.getName(); |
| switch (method.getParameterCount()) { |
| case 1: |
| if ((returnType == void.class) && name.endsWith("Listener")) { |
| if (name.startsWith("add")) { |
| EventSetInfo info = getInfo(map, name.substring(3, name.length() - 8)); |
| info.add = getInfo(info.add, method, 3, 0); |
| } else if (name.startsWith("remove")) { |
| EventSetInfo info = getInfo(map, name.substring(6, name.length() - 8)); |
| info.remove = getInfo(info.remove, method, 6, 0); |
| } |
| } |
| break; |
| case 0: |
| if (returnType.isArray() && name.startsWith("get") && name.endsWith("Listeners")) { |
| EventSetInfo info = getInfo(map, name.substring(3, name.length() - 9)); |
| info.get = getInfo(info.get, method, 3, 1); |
| } |
| break; |
| } |
| } |
| } |
| Iterator<EventSetInfo> iterator = map.values().iterator(); |
| while (iterator.hasNext()) { |
| if (!iterator.next().initialize()) { |
| iterator.remove(); |
| } |
| } |
| return !map.isEmpty() |
| ? Collections.unmodifiableMap(map) |
| : Collections.emptyMap(); |
| } |
| } |