معماری بهار سری 5. نمایش ادغام Mybatis

src/com/yaruyng/batis/
├── DefaultSqlSessionFactory.java
├── DefaultSqlSession.java
├── SqlSessionFactory.java
├── SqlSession.java
└── MapperNode.java

public class DefaultSqlSessionFactory implements SqlSessionFactory {
    @Autowired
    JdbcTemplate jdbcTemplate;

    String mapperLocations;
    Map<String, MapperNode> mapperNodeMap = new HashMap<>();

    public void init() {
        scanLocation(this.mapperLocations);
        // Initialize mapper nodes
    }

    @Override
    public SqlSession openSession() {
        SqlSession newSqlSession = new DefaultSqlSession();
        newSqlSession.setJdbcTemplate(jdbcTemplate);
        newSqlSession.setSqlSessionFactory(this);
        return newSqlSession;
    }
}

private Map<String, MapperNode> buildMapperNodes(String filePath) {
    SAXReader saxReader = new SAXReader();
    URL xmlPath = this.getClass().getClassLoader().getResource(filePath);
    try {
        Document document = saxReader.read(xmlPath);
        Element rootElement = document.getRootElement();
        String namespace = rootElement.attributeValue("namespace");

        Iterator<Element> nodes = rootElement.elementIterator();
        while (nodes.hasNext()) {
            Element node = nodes.next();
            String id = node.attributeValue("id");
            String parameterType = node.attributeValue("parameterType");
            String resultType = node.attributeValue("resultType");
            String sql = node.getText();

            MapperNode selectnode = new MapperNode();
            selectnode.setNamespace(namespace);
            selectnode.setId(id);
            selectnode.setParameterType(parameterType);
            selectnode.setResultType(resultType);
            selectnode.setSql(sql);
            selectnode.setParameter("");

            this.mapperNodeMap.put(namespace + "." + id, selectnode);
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return this.mapperNodeMap;
}

public class MapperNode {
    String namespace;
    String id;
    String parameterType;
    String resultType;
    String sql;
    String parameter;

    // Getters and setters
}

public class DefaultSqlSession implements SqlSession {
    JdbcTemplate jdbcTemplate;
    SqlSessionFactory sqlSessionFactory;

    @Override
    public Object selectOne(String sqlid, Object[] args, 
            PreparedStatementCallBack pstmtcallback) {
        String sql = this.sqlSessionFactory.getMapperNode(sqlid).getSql();
        return jdbcTemplate.query(sql, args, pstmtcallback);
    }
}

@Autowired
JdbcTemplate jdbcTemplate;

 namespace="com.example.UserMapper">
     id="findById" parameterType="java.lang.Integer" 
            resultType="com.example.User">
        SELECT * FROM users WHERE id = ?
    

@Repository
public class UserDao {
    @Autowired
    private SqlSessionFactory sqlSessionFactory;

    public User findById(Integer id) {
        SqlSession session = sqlSessionFactory.openSession();
        try {
            return (User) session.selectOne(
                "com.example.UserMapper.findById",
                new Object[]{id},
                new UserRowMapper()
            );
        } finally {
            session.close();
        }
    }
}

private void scanLocation(String location) {
    String sLocation = this.getClass().getClassLoader()
            .getResource("").getPath() + location;
    File dir = new File(sLocation);
    for (File file : dir.listFiles()) {
        if (file.isDirectory()) {
            scanLocation(location + "https://dev.to/" + file.getName());
        } else {
            buildMapperNodes(location + "https://dev.to/" + file.getName());
        }
    }
}

public Object selectOne(String sqlid, Object[] args, 
        PreparedStatementCallBack pstmtcallback) {
    String sql = this.sqlSessionFactory.getMapperNode(sqlid).getSql();
    return jdbcTemplate.query(sql, args, pstmtcallback);
}