001/* 002 * Copyright 2002-2013 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.beans; 018 019import java.beans.BeanInfo; 020import java.beans.IntrospectionException; 021import java.beans.Introspector; 022import java.lang.reflect.Method; 023 024import org.springframework.core.Ordered; 025 026/** 027 * {@link BeanInfoFactory} implementation that evaluates whether bean classes have 028 * "non-standard" JavaBeans setter methods and are thus candidates for introspection 029 * by Spring's (package-visible) {@code ExtendedBeanInfo} implementation. 030 * 031 * <p>Ordered at {@link Ordered#LOWEST_PRECEDENCE} to allow other user-defined 032 * {@link BeanInfoFactory} types to take precedence. 033 * 034 * @author Chris Beams 035 * @since 3.2 036 * @see BeanInfoFactory 037 * @see CachedIntrospectionResults 038 */ 039public class ExtendedBeanInfoFactory implements BeanInfoFactory, Ordered { 040 041 /** 042 * Return an {@link ExtendedBeanInfo} for the given bean class, if applicable. 043 */ 044 @Override 045 public BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException { 046 return (supports(beanClass) ? new ExtendedBeanInfo(Introspector.getBeanInfo(beanClass)) : null); 047 } 048 049 /** 050 * Return whether the given bean class declares or inherits any non-void 051 * returning bean property or indexed property setter methods. 052 */ 053 private boolean supports(Class<?> beanClass) { 054 for (Method method : beanClass.getMethods()) { 055 if (ExtendedBeanInfo.isCandidateWriteMethod(method)) { 056 return true; 057 } 058 } 059 return false; 060 } 061 062 @Override 063 public int getOrder() { 064 return Ordered.LOWEST_PRECEDENCE; 065 } 066 067}