掌握了教育，就掌握了国家——法国谚语
构造动态mapper部分代码如下：
public static void buildMapper(Configuration configuration, Class<?> entityClass) { if (!(configuration instanceof MybatisConfiguration)) { throw new IllegalArgumentException("configuration must be MybatisConfiguration"); } ENTITY_MAPPER_CLASS_CACHE.computeIfAbsent(entityClass, k -> { Class<?> dynamicMapper = new ByteBuddy() .makeInterface(TypeDescription.Generic.Builder.parameterizedType(IMapper.class, entityClass).build()) .name(String.format("io.github.vampireachao.mapper.%sMapper", entityClass.getSimpleName())) .make() .load(ClassUtils.class.getClassLoader()) .getLoaded(); configuration.addMapper(dynamicMapper); return dynamicMapper; }); }
这里是放到一个map里，获取的地方如下：
public static <T> Class<?> getMapperClass(Class<T> clazz) { if (clazz == null || clazz.isPrimitive() || SimpleTypeRegistry.isSimpleType(clazz) || clazz.isInterface()) { throw ExceptionUtils.mpe("找不到指定的class！请仅在明确确定会有 class 的时候，调用该方法"); } Class<?> targetClass = ClassUtils.getUserClass(clazz); Class<?> mapperClass = ENTITY_MAPPER_CLASS_CACHE.get(targetClass); if (null != mapperClass) { return mapperClass; } Class<?> currentClass = clazz; while (null == mapperClass && Object.class != currentClass) { currentClass = currentClass.getSuperclass(); mapperClass = ENTITY_MAPPER_CLASS_CACHE.get(ClassUtils.getUserClass(currentClass)); } if (mapperClass == null) { mapperClass = ClassUtils.toClassConfident(getTableInfo(clazz).getCurrentNamespace()); } if (mapperClass != null) { ENTITY_MAPPER_CLASS_CACHE.put(targetClass, mapperClass); } return mapperClass; }
使用：
@Test void testBuildMapper() { UserInfo userInfo = new UserInfo() {{ setId(1L); setName("Jone"); }}; Configuration configuration = TableInfoHelper.getTableInfo(UserInfo.class).getConfiguration(); Database.buildMapper(configuration, UserInfo.class); TableInfo tableInfo = TableInfoHelper.getTableInfo(userInfo.getClass()); Assertions.assertNotNull(tableInfo); Assertions.assertFalse(Database.list(userInfo.getClass()).isEmpty()); }
