| /* |
| * Copyright (c) 2009, 2012, 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.finder; |
| |
| import java.beans.BeanDescriptor; |
| import java.beans.BeanInfo; |
| import java.beans.MethodDescriptor; |
| import java.beans.PropertyDescriptor; |
| import java.lang.reflect.Method; |
| |
| /** |
| * This is utility class that provides functionality |
| * to find a {@link BeanInfo} for a JavaBean specified by its type. |
| * |
| * @since 1.7 |
| * |
| * @author Sergey A. Malenkov |
| */ |
| public final class BeanInfoFinder |
| extends InstanceFinder<BeanInfo> { |
| |
| private static final String DEFAULT = "sun.beans.infos"; |
| private static final String DEFAULT_NEW = "com.sun.beans.infos"; |
| |
| public BeanInfoFinder() { |
| super(BeanInfo.class, true, "BeanInfo", DEFAULT); |
| } |
| |
| private static boolean isValid(Class<?> type, Method method) { |
| return (method != null) && method.getDeclaringClass().isAssignableFrom(type); |
| } |
| |
| @Override |
| protected BeanInfo instantiate(Class<?> type, String prefix, String name) { |
| if (DEFAULT.equals(prefix)) { |
| prefix = DEFAULT_NEW; |
| } |
| // this optimization will only use the BeanInfo search path |
| // if is has changed from the original |
| // or trying to get the ComponentBeanInfo |
| BeanInfo info = !DEFAULT_NEW.equals(prefix) || "ComponentBeanInfo".equals(name) |
| ? super.instantiate(type, prefix, name) |
| : null; |
| |
| if (info != null) { |
| // make sure that the returned BeanInfo matches the class |
| BeanDescriptor bd = info.getBeanDescriptor(); |
| if (bd != null) { |
| if (type.equals(bd.getBeanClass())) { |
| return info; |
| } |
| } |
| else { |
| PropertyDescriptor[] pds = info.getPropertyDescriptors(); |
| if (pds != null) { |
| for (PropertyDescriptor pd : pds) { |
| Method method = pd.getReadMethod(); |
| if (method == null) { |
| method = pd.getWriteMethod(); |
| } |
| if (isValid(type, method)) { |
| return info; |
| } |
| } |
| } |
| else { |
| MethodDescriptor[] mds = info.getMethodDescriptors(); |
| if (mds != null) { |
| for (MethodDescriptor md : mds) { |
| if (isValid(type, md.getMethod())) { |
| return info; |
| } |
| } |
| } |
| } |
| } |
| } |
| return null; |
| } |
| } |