/* * Copyright 2014 mango.jfaster.org * * The Mango Project licenses this file to you 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.jfaster.mango.plugin.spring.config; import java.util.Map; import java.util.function.Consumer; import org.springframework.beans.PropertyEditorRegistry; import org.springframework.beans.factory.support.DefaultListableBeanFactory; import org.springframework.boot.context.properties.bind.BindHandler; import org.springframework.boot.context.properties.bind.BindResult; import org.springframework.boot.context.properties.bind.Bindable; import org.springframework.boot.context.properties.bind.Binder; import org.springframework.boot.context.properties.bind.PropertySourcesPlaceholdersResolver; import org.springframework.boot.context.properties.bind.handler.IgnoreErrorsBindHandler; import org.springframework.boot.context.properties.source.ConfigurationPropertySource; import org.springframework.boot.context.properties.source.ConfigurationPropertySources; import org.springframework.context.support.PropertySourcesPlaceholderConfigurer; import org.springframework.core.convert.ConversionService; 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.PropertySources; /** * @author yangnan. */ public class MangoConfigFactory { /** * 获取配置 * * @param beanFactory beanFactory * @param prefix 前缀 * @return */ public static MangoConfig getMangoConfig(DefaultListableBeanFactory beanFactory, String prefix) { MangoConfig config = new MangoConfig(); Bindable<?> target = Bindable.ofInstance(config); PropertySources propertySources = getPropertySources(beanFactory); BindHandler bindHandler = getBindHandler(); BindResult configBindResult = getBinder(propertySources, beanFactory).bind(prefix, target, bindHandler); return (MangoConfig) configBindResult.get(); } private static Binder getBinder(PropertySources propertySources, DefaultListableBeanFactory beanFactory) { return new Binder(getConfigurationPropertySources(propertySources), getPropertySourcesPlaceholdersResolver(propertySources), getConversionService(), getPropertyEditorInitializer(beanFactory)); } private static Consumer<PropertyEditorRegistry> getPropertyEditorInitializer(DefaultListableBeanFactory beanFactory) { return beanFactory::copyRegisteredEditorsTo; } private static ConversionService getConversionService() { return new DefaultConversionService(); } private static Iterable<ConfigurationPropertySource> getConfigurationPropertySources(PropertySources propertySources) { return ConfigurationPropertySources.from(propertySources); } private static PropertySourcesPlaceholdersResolver getPropertySourcesPlaceholdersResolver(PropertySources propertySources) { return new PropertySourcesPlaceholdersResolver(propertySources); } private static BindHandler getBindHandler() { BindHandler handler = new ThrowErrorBindHandler(); return handler; } public static PropertySources getPropertySources(DefaultListableBeanFactory beanFactory) { PropertySourcesPlaceholderConfigurer configurer = getSinglePropertySourcesPlaceholderConfigurer(beanFactory); if (configurer != null) { return configurer.getAppliedPropertySources(); } MutablePropertySources sources = extractEnvironmentPropertySources(beanFactory); if (sources != null) { return sources; } throw new IllegalStateException("Unable to obtain PropertySources from " + "PropertySourcesPlaceholderConfigurer or Environment"); } private static MutablePropertySources extractEnvironmentPropertySources(DefaultListableBeanFactory beanFactory) { Environment environment = beanFactory.getBean(Environment.class); if (environment instanceof ConfigurableEnvironment) { return ((ConfigurableEnvironment) environment).getPropertySources(); } return null; } private static PropertySourcesPlaceholderConfigurer getSinglePropertySourcesPlaceholderConfigurer(DefaultListableBeanFactory beanFactory) { // Take care not to cause early instantiation of all FactoryBeans Map<String, PropertySourcesPlaceholderConfigurer> beans = beanFactory.getBeansOfType(PropertySourcesPlaceholderConfigurer.class, false, false); if (beans.size() == 1) { return beans.values().iterator().next(); } return null; } }