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+package com.baomidou.mybatisplus.autoconfigure;
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+
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+
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+import java.util.List;
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+
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+import javax.annotation.PostConstruct;
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+import javax.sql.DataSource;
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+
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+import org.apache.ibatis.annotations.Mapper;
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+import org.apache.ibatis.mapping.DatabaseIdProvider;
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+import org.apache.ibatis.plugin.Interceptor;
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+import org.apache.ibatis.session.ExecutorType;
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+import org.apache.ibatis.session.SqlSessionFactory;
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+import org.mybatis.spring.SqlSessionFactoryBean;
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+import org.mybatis.spring.SqlSessionTemplate;
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+import org.mybatis.spring.mapper.ClassPathMapperScanner;
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+import org.mybatis.spring.mapper.MapperFactoryBean;
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+import org.slf4j.Logger;
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+import org.slf4j.LoggerFactory;
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+
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+import org.springframework.beans.BeansException;
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+import org.springframework.beans.factory.BeanFactory;
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+import org.springframework.beans.factory.BeanFactoryAware;
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+import org.springframework.beans.factory.ObjectProvider;
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+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
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+import org.springframework.boot.autoconfigure.AutoConfigurationPackages;
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+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
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+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
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+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
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+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
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+import org.springframework.boot.autoconfigure.condition.ConditionalOnSingleCandidate;
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+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
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+import org.springframework.boot.context.properties.EnableConfigurationProperties;
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+import org.springframework.context.ApplicationContext;
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+import org.springframework.context.ResourceLoaderAware;
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+import org.springframework.context.annotation.Bean;
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+import org.springframework.context.annotation.Import;
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+import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
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+import org.springframework.core.io.Resource;
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+import org.springframework.core.io.ResourceLoader;
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+import org.springframework.core.type.AnnotationMetadata;
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+import org.springframework.util.Assert;
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+import org.springframework.util.CollectionUtils;
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+import org.springframework.util.ObjectUtils;
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+import org.springframework.util.StringUtils;
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+
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+import com.baomidou.mybatisplus.core.MybatisConfiguration;
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+import com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver;
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+import com.baomidou.mybatisplus.core.config.GlobalConfig;
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+import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
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+import com.baomidou.mybatisplus.core.incrementer.IKeyGenerator;
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+import com.baomidou.mybatisplus.core.injector.ISqlInjector;
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+import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
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+
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+/**
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+ * {@link EnableAutoConfiguration Auto-Configuration} for Mybatis. Contributes a
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+ * {@link SqlSessionFactory} and a {@link SqlSessionTemplate}.
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+ * <p>
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+ * If {@link org.mybatis.spring.annotation.MapperScan} is used, or a
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+ * configuration file is specified as a property, those will be considered,
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+ * otherwise this auto-configuration will attempt to register mappers based on
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+ * the interface definitions in or under the root auto-configuration package.
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+ *
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+ * @author Eddú Meléndez
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+ * @author Josh Long
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+ * @author Kazuki Shimizu
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+ * @author Eduardo Macarrón
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+ */
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+@org.springframework.context.annotation.Configuration
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+@ConditionalOnClass({SqlSessionFactory.class, SqlSessionFactoryBean.class})
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+@ConditionalOnSingleCandidate(DataSource.class)
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+@EnableConfigurationProperties(MybatisPlusProperties.class)
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+@AutoConfigureAfter(DataSourceAutoConfiguration.class)
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+public class MybatisPlusAutoConfiguration {
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+
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+ private static final Logger logger = LoggerFactory.getLogger(MybatisPlusAutoConfiguration.class);
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+
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+ private final MybatisPlusProperties properties;
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+
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+ private final Interceptor[] interceptors;
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+
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+ private final ResourceLoader resourceLoader;
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+
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+ private final DatabaseIdProvider databaseIdProvider;
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+
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+ private final List<ConfigurationCustomizer> configurationCustomizers;
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+
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+ private final ApplicationContext applicationContext;
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+
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+ public MybatisPlusAutoConfiguration(MybatisPlusProperties properties,
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+ ObjectProvider<Interceptor[]> interceptorsProvider,
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+ ResourceLoader resourceLoader,
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+ ObjectProvider<DatabaseIdProvider> databaseIdProvider,
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+ ObjectProvider<List<ConfigurationCustomizer>> configurationCustomizersProvider,
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+ ApplicationContext applicationContext) {
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+ this.properties = properties;
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+ this.interceptors = interceptorsProvider.getIfAvailable();
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+ this.resourceLoader = resourceLoader;
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+ this.databaseIdProvider = databaseIdProvider.getIfAvailable();
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+ this.configurationCustomizers = configurationCustomizersProvider.getIfAvailable();
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+ this.applicationContext = applicationContext;
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+ }
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+
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+ @PostConstruct
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+ public void checkConfigFileExists() {
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+ if (this.properties.isCheckConfigLocation() && StringUtils.hasText(this.properties.getConfigLocation())) {
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+ Resource resource = this.resourceLoader.getResource(this.properties.getConfigLocation());
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+ Assert.state(resource.exists(), "Cannot find config location: " + resource
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+ + " (please add config file or check your Mybatis configuration)");
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+ }
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+ }
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+
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+ @Bean
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+ @ConditionalOnMissingBean
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+ public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
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+ MybatisSqlSessionFactoryBean factory = new MybatisSqlSessionFactoryBean();
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+ factory.setDataSource(dataSource);
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+ factory.setVfs(SpringBootVFS.class);
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+ if (StringUtils.hasText(this.properties.getConfigLocation())) {
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+ factory.setConfigLocation(this.resourceLoader.getResource(this.properties.getConfigLocation()));
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+ }
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+ applyConfiguration(factory);
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+ if (this.properties.getConfigurationProperties() != null) {
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+ factory.setConfigurationProperties(this.properties.getConfigurationProperties());
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+ }
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+ if (!ObjectUtils.isEmpty(this.interceptors)) {
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+ factory.setPlugins(this.interceptors);
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+ }
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+ if (this.databaseIdProvider != null) {
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+ factory.setDatabaseIdProvider(this.databaseIdProvider);
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+ }
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+ if (StringUtils.hasLength(this.properties.getTypeAliasesPackage())) {
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+ factory.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());
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+ }
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+ // TODO 自定义枚举包
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+ if (StringUtils.hasLength(this.properties.getTypeEnumsPackage())) {
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+ factory.setTypeEnumsPackage(this.properties.getTypeEnumsPackage());
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+ }
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+ if (this.properties.getTypeAliasesSuperType() != null) {
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+ factory.setTypeAliasesSuperType(this.properties.getTypeAliasesSuperType());
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+ }
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+ if (StringUtils.hasLength(this.properties.getTypeHandlersPackage())) {
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+ factory.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());
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+ }
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+ if (!ObjectUtils.isEmpty(this.properties.resolveMapperLocations())) {
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+ factory.setMapperLocations(this.properties.resolveMapperLocations());
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+ }
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+ GlobalConfig globalConfig;
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+ if (!ObjectUtils.isEmpty(this.properties.getGlobalConfig())) {
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+ globalConfig = this.properties.getGlobalConfig();
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+ } else {
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+ globalConfig = new GlobalConfig();
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+ }
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+ //注入填充器
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+ if (this.applicationContext.getBeanNamesForType(MetaObjectHandler.class,
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+ false, false).length > 0) {
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+ MetaObjectHandler metaObjectHandler = this.applicationContext.getBean(MetaObjectHandler.class);
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+ globalConfig.setMetaObjectHandler(metaObjectHandler);
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+ }
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+ //注入主键生成器
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+ if (this.applicationContext.getBeanNamesForType(IKeyGenerator.class, false,
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+ false).length > 0) {
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+ IKeyGenerator keyGenerator = this.applicationContext.getBean(IKeyGenerator.class);
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+ globalConfig.setKeyGenerator(keyGenerator);
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+ }
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+ //注入sql注入器
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+ if (this.applicationContext.getBeanNamesForType(ISqlInjector.class, false,
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+ false).length > 0) {
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+ ISqlInjector iSqlInjector = this.applicationContext.getBean(ISqlInjector.class);
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+ globalConfig.setSqlInjector(iSqlInjector);
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+ }
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+ factory.setGlobalConfig(globalConfig);
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+ return factory.getObject();
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+ }
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+
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+ private void applyConfiguration(MybatisSqlSessionFactoryBean factory) {
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+ MybatisConfiguration configuration = this.properties.getConfiguration();
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+ if (configuration == null && !StringUtils.hasText(this.properties.getConfigLocation())) {
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+ configuration = new MybatisConfiguration();
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+ }
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+ if (configuration != null && !CollectionUtils.isEmpty(this.configurationCustomizers)) {
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+ for (ConfigurationCustomizer customizer : this.configurationCustomizers) {
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+ customizer.customize(configuration);
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+ }
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+ }
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+ // TODO 自定义配置
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+ if (null != configuration) {
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+ configuration.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);
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+ }
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+ factory.setConfiguration(configuration);
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+ }
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+
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+ @Bean
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+ @ConditionalOnMissingBean
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+ public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
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+ ExecutorType executorType = this.properties.getExecutorType();
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+ if (executorType != null) {
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+ return new SqlSessionTemplate(sqlSessionFactory, executorType);
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+ } else {
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+ return new SqlSessionTemplate(sqlSessionFactory);
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+ }
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+ }
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+
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+ /**
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+ * This will just scan the same base package as Spring Boot does. If you want
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+ * more power, you can explicitly use
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+ * {@link org.mybatis.spring.annotation.MapperScan} but this will get typed
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+ * mappers working correctly, out-of-the-box, similar to using Spring Data JPA
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+ * repositories.
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+ */
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+ public static class AutoConfiguredMapperScannerRegistrar
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+ implements BeanFactoryAware, ImportBeanDefinitionRegistrar, ResourceLoaderAware {
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+
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+ private BeanFactory beanFactory;
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+
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+ private ResourceLoader resourceLoader;
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+
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+ @Override
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+ public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
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+
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+ logger.debug("Searching for mappers annotated with @Mapper");
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+
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+ ClassPathMapperScanner scanner = new ClassPathMapperScanner(registry);
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+
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+ try {
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+ if (this.resourceLoader != null) {
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+ scanner.setResourceLoader(this.resourceLoader);
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+ }
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+
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+ List<String> packages = AutoConfigurationPackages.get(this.beanFactory);
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+ if (logger.isDebugEnabled()) {
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+ packages.forEach(pkg -> logger.debug("Using auto-configuration base package '{}'", pkg));
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+ }
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+
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+ scanner.setAnnotationClass(Mapper.class);
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+ scanner.registerFilters();
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+ scanner.doScan(StringUtils.toStringArray(packages));
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+ } catch (IllegalStateException ex) {
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+ logger.debug("Could not determine auto-configuration package, automatic mapper scanning disabled.", ex);
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+ }
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+ }
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+
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+ @Override
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+ public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
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+ this.beanFactory = beanFactory;
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+ }
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+
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+ @Override
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+ public void setResourceLoader(ResourceLoader resourceLoader) {
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+ this.resourceLoader = resourceLoader;
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+ }
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+ }
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+
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+ /**
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+ * {@link org.mybatis.spring.annotation.MapperScan} ultimately ends up
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+ * creating instances of {@link MapperFactoryBean}. If
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+ * {@link org.mybatis.spring.annotation.MapperScan} is used then this
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+ * auto-configuration is not needed. If it is _not_ used, however, then this
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+ * will bring in a bean registrar and automatically register components based
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+ * on the same component-scanning path as Spring Boot itself.
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+ */
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+ @org.springframework.context.annotation.Configuration
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+ @Import({AutoConfiguredMapperScannerRegistrar.class})
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+ @ConditionalOnMissingBean(MapperFactoryBean.class)
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+ public static class MapperScannerRegistrarNotFoundConfiguration {
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+
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+ @PostConstruct
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+ public void afterPropertiesSet() {
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+ logger.debug("No {} found.", MapperFactoryBean.class.getName());
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+ }
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+ }
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+
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+}
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