1 /* 2 * Copyright 2009-2023 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * https://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.apache.ibatis.annotations; 17 18 import java.lang.annotation.Documented; 19 import java.lang.annotation.ElementType; 20 import java.lang.annotation.Retention; 21 import java.lang.annotation.RetentionPolicy; 22 import java.lang.annotation.Target; 23 24 /** 25 * The annotation that specify result map names to use. 26 * <p> 27 * <b>How to use:</b><br> 28 * Mapper interface: 29 * 30 * <pre> 31 * public interface UserMapper { 32 * @Select("SELECT id, name FROM users WHERE id = #{id}") 33 * @ResultMap("userMap") 34 * User selectById(int id); 35 * 36 * @Select("SELECT u.id, u.name FROM users u INNER JOIN users_email ue ON u.id = ue.id WHERE ue.email = #{email}") 37 * @ResultMap("userMap") 38 * User selectByEmail(String email); 39 * } 40 * </pre> 41 * 42 * Mapper XML: 43 * 44 * <pre>{@code 45 * <mapper namespace="com.example.mapper.UserMapper"> 46 * <resultMap id="userMap" type="com.example.model.User"> 47 * <id property="id" column="id" /> 48 * <result property="name" column="name" /> 49 * <association property="email" select="selectUserEmailById" column="id" fetchType="lazy"/> 50 * </resultMap> 51 * </mapper> 52 * } 53 * </pre> 54 * 55 * @author Jeff Butler 56 */ 57 @Documented 58 @Retention(RetentionPolicy.RUNTIME) 59 @Target(ElementType.METHOD) 60 public @interface ResultMap { 61 /** 62 * Returns result map names to use. 63 * 64 * @return result map names 65 */ 66 String[] value(); 67 }