/*
* 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")) {
/**代码未完, 请加载全部代码(NowJava.com).**/