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/*
* Copyright 2012-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.context.properties;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanCreationException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.boot.bind.PropertiesConfigurationFactory;
import org.springframework.boot.validation.MessageInterpolatorFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.core.Ordered;
import org.springframework.core.PriorityOrdered;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.GenericConverter;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.Environment;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.env.PropertySource;
import org.springframework.core.env.PropertySources;
import org.springframework.core.env.StandardEnvironment;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
import org.springframework.validation.annotation.Validated;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
/**
* {@link BeanPostProcessor} to bind {@link PropertySources} to beans annotated with
* {@link ConfigurationProperties}.
*
* @author Dave Syer
* @author Phillip Webb
* @author Christian Dupuis
* @author Stephane Nicoll
*/
public class ConfigurationPropertiesBindingPostProcessor implements BeanPostProcessor,
BeanFactoryAware, EnvironmentAware, ApplicationContextAware, InitializingBean,
DisposableBean, ApplicationListener, PriorityOrdered {
/**
* The bean name of the configuration properties validator.
*/
public static final String VALIDATOR_BEAN_NAME = "configurationPropertiesValidator";
private static final String[] VALIDATOR_CLASSES = { "javax.validation.Validator",
"javax.validation.ValidatorFactory",
"javax.validation.bootstrap.GenericBootstrap" };
private static final Log logger = LogFactory
.getLog(ConfigurationPropertiesBindingPostProcessor.class);
private ConfigurationBeanFactoryMetaData beans = new ConfigurationBeanFactoryMetaData();
private PropertySources propertySources;
private Validator validator;
private volatile Validator localValidator;
private ConversionService conversionService;
private DefaultConversionService defaultConversionService;
private BeanFactory beanFactory;
private Environment environment = new StandardEnvironment();
private ApplicationContext applicationContext;
private List> converters = Collections.emptyList();
private List genericConverters = Collections.emptyList();
private int order = Ordered.HIGHEST_PRECEDENCE + 1;
/**
* A list of custom converters (in addition to the defaults) to use when converting
* properties for binding.
* @param converters the converters to set
*/
@Autowired(required = false)
@ConfigurationPropertiesBinding
public void setConverters(List> converters) {
this.converters = converters;
}
/**
* A list of custom converters (in addition to the defaults) to use when converting
* properties for binding.
* @param converters the converters to set
*/
@Autowired(required = false)
@ConfigurationPropertiesBinding
public void setGenericConverters(List converters) {
this.genericConverters = converters;
}
/**
* Set the order of the bean.
* @param order the order
*/
public void setOrder(int order) {
this.order = order;
}
/**
* Return the order of the bean.
* @return the order
*/
@Override
public int getOrder() {
return this.order;
}
/**
* Set the property sources to bind.
* @param propertySources the property sources
*/
public void setPropertySources(PropertySources propertySources) {
this.propertySources = propertySources;
}
/**
* Set the bean validator used to validate property fields.
* @param validator the validator
*/
public void setValidator(Validator validator) {
this.validator = validator;
}
/**
* Set the conversion service used to convert property values.
* @param conversionService the conversion service
*/
public void setConversionService(ConversionService conversionService) {
this.conversionService = conversionService;
}
/**
* Set the bean meta-data store.
* @param beans the bean meta data store
*/
public void setBeanMetaDataStore(ConfigurationBeanFactoryMetaData beans) {
this.beans = beans;
}
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = beanFactory;
}
@Override
public void setEnvironment(Environment environment) {
this.environment = environment;
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
@Override
public void afterPropertiesSet() throws Exception {
if (this.propertySources == null) {
this.propertySources = deducePropertySources();
}
if (this.validator == null) {
this.validator = getOptionalBean(VALIDATOR_BEAN_NAME, Validator.class);
}
if (this.conversionService == null) {
this.conversionService = getOptionalBean(
ConfigurableApplicationContext.CONVERSION_SERVICE_BEAN_NAME,
ConversionService.class);
}
}
@Override
public void onApplicationEvent(ContextRefreshedEvent event) {
freeLocalValidator();
}
@Override
public void destroy() throws Exception {
freeLocalValidator();
}
private void freeLocalValidator() {
try {
Validator validator = this.localValidator;
this.localValidator = null;
if (validator != null) {
((DisposableBean) validator).destroy();
}
}
catch (Exception ex) {
throw new IllegalStateException(ex);
}
}
private PropertySources deducePropertySources() {
PropertySourcesPlaceholderConfigurer configurer = getSinglePropertySourcesPlaceholderConfigurer();
if (configurer != null) {
// Flatten the sources into a single list so they can be iterated
return new FlatPropertySources(configurer.getAppliedPropertySources());
}
if (this.environment instanceof ConfigurableEnvironment) {
MutablePropertySources propertySources = ((ConfigurableEnvironment) this.environment)
.getPropertySources();
return new FlatPropertySources(propertySources);
}
// empty, so not very useful, but fulfils the contract
logger.warn("Unable to obtain PropertySources from "
+ "PropertySourcesPlaceholderConfigurer or Environment");
return new MutablePropertySources();
}
private PropertySourcesPlaceholderConfigurer getSinglePropertySourcesPlaceholderConfigurer() {
// Take care not to cause early instantiation of all FactoryBeans
if (this.beanFactory instanceof ListableBeanFactory) {
ListableBeanFactory listableBeanFactory = (ListableBeanFactory) this.beanFactory;
Map beans = listableBeanFactory
.getBeansOfType(PropertySourcesPlaceholderConfigurer.class, false,
false);
if (beans.size() == 1) {
return beans.values().iterator().next();
}
if (beans.size() > 1 && logger.isWarnEnabled()) {
logger.warn("Multiple PropertySourcesPlaceholderConfigurer "
+ "beans registered " + beans.keySet()
+ ", falling back to Environment");
}
}
return null;
}
private T getOptionalBean(String name, Class type) {
try {
return this.beanFactory.getBean(name, type);
}
catch (NoSuchBeanDefinitionException ex) {
return null;
}
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName)
throws BeansException {
ConfigurationProperties annotation = AnnotationUtils
.findAnnotation(bean.getClass(), ConfigurationProperties.class);
if (annotation != null) {
postProcessBeforeInitialization(bean, beanName, annotation);
}
annotation = this.beans.findFactoryAnnotation(beanName,
ConfigurationProperties.class);
if (annotation != null) {
postProcessBeforeInitialization(bean, beanName, annotation);
}
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName)
throws BeansException {
return bean;
}
@SuppressWarnings("deprecation")
private void postProcessBeforeInitialization(Object bean, String beanName,
ConfigurationProperties annotation) {
Object target = bean;
PropertiesConfigurationFactory