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; 025import org.springframework.lang.Nullable; 026 027/** 028 * {@link BeanInfoFactory} implementation that evaluates whether bean classes have 029 * "non-standard" JavaBeans setter methods and are thus candidates for introspection 030 * by Spring's (package-visible) {@code ExtendedBeanInfo} implementation. 031 * 032 * <p>Ordered at {@link Ordered#LOWEST_PRECEDENCE} to allow other user-defined 033 * {@link BeanInfoFactory} types to take precedence. 034 * 035 * @author Chris Beams 036 * @since 3.2 037 * @see BeanInfoFactory 038 * @see CachedIntrospectionResults 039 */ 040public class ExtendedBeanInfoFactory implements BeanInfoFactory, Ordered { 041 042 /** 043 * Return an {@link ExtendedBeanInfo} for the given bean class, if applicable. 044 */ 045 @Override 046 @Nullable 047 public BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException { 048 return (supports(beanClass) ? new ExtendedBeanInfo(Introspector.getBeanInfo(beanClass)) : null); 049 } 050 051 /** 052 * Return whether the given bean class declares or inherits any non-void 053 * returning bean property or indexed property setter methods. 054 */ 055 private boolean supports(Class<?> beanClass) { 056 for (Method method : beanClass.getMethods()) { 057 if (ExtendedBeanInfo.isCandidateWriteMethod(method)) { 058 return true; 059 } 060 } 061 return false; 062 } 063 064 @Override 065 public int getOrder() { 066 return Ordered.LOWEST_PRECEDENCE; 067 } 068 069}