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.Repeatable;
21 import java.lang.annotation.Retention;
22 import java.lang.annotation.RetentionPolicy;
23 import java.lang.annotation.Target;
24
25 /**
26 * The annotation that specify a method that provide an SQL for deleting record(s).
27 * <p>
28 * <b>How to use:</b>
29 *
30 * <pre>
31 * public interface UserMapper {
32 *
33 * @DeleteProvider(type = SqlProvider.class, method = "deleteById")
34 * boolean deleteById(int id);
35 *
36 * public static class SqlProvider {
37 * public static String deleteById() {
38 * return "DELETE FROM users WHERE id = #{id}";
39 * }
40 * }
41 *
42 * }
43 * </pre>
44 *
45 * @author Clinton Begin
46 */
47 @Documented
48 @Retention(RetentionPolicy.RUNTIME)
49 @Target(ElementType.METHOD)
50 @Repeatable(DeleteProvider.List.class)
51 public @interface DeleteProvider {
52
53 /**
54 * Specify a type that implements an SQL provider method.
55 *
56 * @return a type that implements an SQL provider method
57 *
58 * @since 3.5.2
59 *
60 * @see #type()
61 */
62 Class<?> value() default void.class;
63
64 /**
65 * Specify a type that implements an SQL provider method.
66 * <p>
67 * This attribute is alias of {@link #value()}.
68 * </p>
69 *
70 * @return a type that implements an SQL provider method
71 *
72 * @see #value()
73 */
74 Class<?> type() default void.class;
75
76 // @formatter:off
77 /**
78 * Specify a method for providing an SQL.
79 * <p>
80 * Since 3.5.1, this attribute can omit.
81 * <p>
82 * If this attribute omit, the MyBatis will call a method that decide by following rules.
83 * <ul>
84 * <li>
85 * If class that specified the {@link #type()} attribute implements the
86 * {@link org.apache.ibatis.builder.annotation.ProviderMethodResolver},
87 * the MyBatis use a method that returned by it
88 * </li>
89 * <li>
90 * If cannot resolve a method by {@link org.apache.ibatis.builder.annotation.ProviderMethodResolver}(= not implement it or it was returned {@code null}),
91 * the MyBatis will search and use a fallback method that named {@code provideSql} from specified type
92 * </li>
93 * </ul>
94 *
95 * @return a method name of method for providing an SQL
96 */
97 // @formatter:on
98 String method() default "";
99
100 /**
101 * @return A database id that correspond this provider
102 *
103 * @since 3.5.5
104 */
105 String databaseId() default "";
106
107 /**
108 * The container annotation for {@link DeleteProvider}.
109 *
110 * @author Kazuki Shimizu
111 *
112 * @since 3.5.5
113 */
114 @Documented
115 @Retention(RetentionPolicy.RUNTIME)
116 @Target(ElementType.METHOD)
117 @interface List {
118 DeleteProvider[] value();
119 }
120
121 }