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An enhanced toolkit of Mybatis to simplify development.
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/*
 * Copyright (c) 2011-2020, baomidou ([email protected]).
 * 
 * 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
 * 

 * https://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 com.baomidou.mybatisplus.autoconfigure;

import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.core.config.GlobalConfig;
import com.baomidou.mybatisplus.core.toolkit.Constants;
import com.baomidou.mybatisplus.core.toolkit.GlobalConfigUtils;
import lombok.Data;
import lombok.experimental.Accessors;
import org.apache.ibatis.scripting.LanguageDriver;
import org.apache.ibatis.session.ExecutorType;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.NestedConfigurationProperty;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;

import java.io.IOException;
import java.util.Optional;
import java.util.Properties;
import java.util.stream.Stream;

/**
 * Configuration properties for MyBatis.
 *
 * @author Eddú Meléndez
 * @author Kazuki Shimizu
 */
@Data
@Accessors(chain = true)
@ConfigurationProperties(prefix = Constants.MYBATIS_PLUS)
public class MybatisPlusProperties {

    private static final ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();

    /**
     * Location of MyBatis xml config file.
     */
    private String configLocation;

    /**
     * Locations of MyBatis mapper files.
     *
     * @since 3.1.2 add default value
     */
    private String[] mapperLocations = new String[]{"classpath*:/mapper/**/*.xml"};

    /**
     * Packages to search type aliases. (Package delimiters are ",; \t\n")
     */
    private String typeAliasesPackage;

    /**
     * The super class for filtering type alias.
     * If this not specifies, the MyBatis deal as type alias all classes that searched from typeAliasesPackage.
     */
    private Class typeAliasesSuperType;

    /**
     * Packages to search for type handlers. (Package delimiters are ",; \t\n")
     */
    private String typeHandlersPackage;

    /**
     * Indicates whether perform presence check of the MyBatis xml config file.
     */
    private boolean checkConfigLocation = false;

    /**
     * Execution mode for {@link org.mybatis.spring.SqlSessionTemplate}.
     */
    private ExecutorType executorType;

    /**
     * The default scripting language driver class. (Available when use together with mybatis-spring 2.0.2+)
     * 
     * 如果设置了这个,你会至少失去 mp 提供的有关填充到 entity 的 property 相关的功能
     */
    private Class defaultScriptingLanguageDriver;

    /**
     * Externalized properties for MyBatis configuration.
     */
    private Properties configurationProperties;

    /**
     * A Configuration object for customize default settings. If {@link #configLocation}
     * is specified, this property is not used.
     * TODO 使用 MybatisConfiguration
     */
    @NestedConfigurationProperty
    private MybatisConfiguration configuration;

    /**
     * TODO 枚举包扫描
     */
    private String typeEnumsPackage;

    /**
     * TODO 全局配置
     */
    @NestedConfigurationProperty
    private GlobalConfig globalConfig = GlobalConfigUtils.defaults();


    public Resource[] resolveMapperLocations() {
        return Stream.of(Optional.ofNullable(this.mapperLocations).orElse(new String[0]))
            .flatMap(location -> Stream.of(getResources(location)))
            .toArray(Resource[]::new);
    }

    private Resource[] getResources(String location) {
        try {
            return resourceResolver.getResources(location);
        } catch (IOException e) {
            return new Resource[0];
        }
    }
}