parent
aa2fadd8da
commit
cb682cd8b7
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@ -1,5 +1,5 @@
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/*
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* Copyright 2002-2012 the original author or authors.
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* Copyright 2002-2013 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -20,33 +20,36 @@ import java.beans.BeanInfo;
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import java.beans.IntrospectionException;
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/**
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* Strategy for creating {@link BeanInfo} instances.
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* Strategy interface for creating {@link BeanInfo} instances for Spring beans.
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* Can be used to plug in custom bean property resolution strategies (e.g. for other
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* languages on the JVM) or more efficient {@link BeanInfo} retrieval algorithms.
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*
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* <p>BeanInfoFactories are are instantiated by the {@link CachedIntrospectionResults},
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* by using the {@link org.springframework.core.io.support.SpringFactoriesLoader} utility
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* class.
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* by using the {@link org.springframework.core.io.support.SpringFactoriesLoader}
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* utility class.
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*
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* When a {@link BeanInfo} is to be created, the {@code CachedIntrospectionResults}
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* will iterate through the discovered factories, calling {@link
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* #getBeanInfo(Class)} on each one. If {@code null} is returned, the next factory will
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* be queried. If none of the factories support the class, an standard {@link BeanInfo}
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* is created as a default.
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* will iterate through the discovered factories, calling {@link #getBeanInfo(Class)}
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* on each one. If {@code null} is returned, the next factory will be queried.
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* If none of the factories support the class, a standard {@link BeanInfo} will be
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* created as a default.
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*
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* <p>Note that the {@link org.springframework.core.io.support.SpringFactoriesLoader}
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* sorts the {@code BeanInfoFactory} instances by
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* {@link org.springframework.core.annotation.Order @Order}, so that ones with
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* a higher precedence come first.
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* {@link org.springframework.core.annotation.Order @Order}, so that ones with a
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* higher precedence come first.
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*
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* @author Arjen Poutsma
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* @since 3.2
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* @see CachedIntrospectionResults
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* @see org.springframework.core.io.support.SpringFactoriesLoader
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*/
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public interface BeanInfoFactory {
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/**
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* Returns the bean info for the given class, if supported.
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*
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* Return the bean info for the given class, if supported.
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* @param beanClass the bean class
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* @return the bean info, or {@code null} if not the given class is not supported
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* @return the BeanInfo, or {@code null} if the given class is not supported
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* @throws IntrospectionException in case of exceptions
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*/
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BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException;
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@ -1,5 +1,5 @@
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/*
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* Copyright 2002-2012 the original author or authors.
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* Copyright 2002-2013 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -25,8 +25,8 @@ import org.springframework.core.Ordered;
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/**
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* {@link BeanInfoFactory} implementation that evaluates whether bean classes have
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* "non-standard" JavaBeans setter methods and are thus candidates for introspection by
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* Spring's {@link ExtendedBeanInfo}.
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* "non-standard" JavaBeans setter methods and are thus candidates for introspection
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* by Spring's (package-visible) {@code ExtendedBeanInfo} implementation.
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*
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* <p>Ordered at {@link Ordered#LOWEST_PRECEDENCE} to allow other user-defined
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* {@link BeanInfoFactory} types to take precedence.
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@ -34,21 +34,21 @@ import org.springframework.core.Ordered;
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* @author Chris Beams
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* @since 3.2
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* @see BeanInfoFactory
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* @see CachedIntrospectionResults
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*/
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public class ExtendedBeanInfoFactory implements Ordered, BeanInfoFactory {
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public class ExtendedBeanInfoFactory implements BeanInfoFactory, Ordered {
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/**
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* Return a new {@link ExtendedBeanInfo} for the given bean class.
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* Return an {@link ExtendedBeanInfo} for the given bean class, if applicable.
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*/
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@Override
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public BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException {
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return supports(beanClass) ?
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new ExtendedBeanInfo(Introspector.getBeanInfo(beanClass)) : null;
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return (supports(beanClass) ? new ExtendedBeanInfo(Introspector.getBeanInfo(beanClass)) : null);
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}
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/**
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* Return whether the given bean class declares or inherits any non-void returning
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* JavaBeans or <em>indexed property</em> setter methods.
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* Return whether the given bean class declares or inherits any non-void
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* returning bean property or indexed property setter methods.
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*/
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private boolean supports(Class<?> beanClass) {
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for (Method method : beanClass.getMethods()) {
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