Support anonymous enum object that implement method

src/main/java/org/apache/ibatis/type/TypeHandlerRegistry.java

@@ -241,11 +241,12 @@ private Map<JdbcType, TypeHandler<?>> getJdbcHandlerMap(Type type) {
     }
     if (jdbcHandlerMap == null && type instanceof Class) {
       Class<?> clazz = (Class<?>) type;
-      if (clazz.isEnum()) {
-        jdbcHandlerMap = getJdbcHandlerMapForEnumInterfaces(clazz, clazz);
+      if (Enum.class.isAssignableFrom(clazz)) {
+        Class<?> enumClass = clazz.isAnonymousClass() ? clazz.getSuperclass() : clazz;
+        jdbcHandlerMap = getJdbcHandlerMapForEnumInterfaces(enumClass, enumClass);
         if (jdbcHandlerMap == null) {
-          register(clazz, getInstance(clazz, defaultEnumTypeHandler));
-          return typeHandlerMap.get(clazz);
+          register(enumClass, getInstance(enumClass, defaultEnumTypeHandler));
+          return typeHandlerMap.get(enumClass);
         }
       } else {
         jdbcHandlerMap = getJdbcHandlerMapForSuperclass(clazz);

src/test/java/org/apache/ibatis/submitted/enum_interface_type_handler/EnumInterfaceTypeHandlerTest.java

@@ -65,4 +65,18 @@ void shouldInsertAUser() {
       assertEquals(Color.BLUE, result.getColor());
     }
   }
+
+  @Test
+  void shouldInsertAUserWithoutParameterTypeInXmlElement() {
+    try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
+      XmlMapper mapper = sqlSession.getMapper(XmlMapper.class);
+      User user = new User();
+      user.setId(2);
+      user.setColor(Color.BLUE);
+      mapper.insertUser(user);
+      User result = sqlSession.getMapper(Mapper.class).getUser(2);
+      assertEquals(Color.BLUE, result.getColor());
+    }
+  }
+
 }

src/test/java/org/apache/ibatis/submitted/enum_interface_type_handler/XmlMapper.java

@@ -0,0 +1,20 @@
+/**
+ *    Copyright 2009-2019 the original author or authors.
+ *
+ *    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
+ *
+ *       http://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 org.apache.ibatis.submitted.enum_interface_type_handler;
+
+public interface XmlMapper {
+  int insertUser(User user);
+}

src/test/java/org/apache/ibatis/submitted/enum_interface_type_handler/XmlMapper.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+       Copyright 2009-2019 the original author or authors.
+
+       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
+
+          http://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.
+
+-->
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+
+<mapper namespace="org.apache.ibatis.submitted.enum_interface_type_handler.XmlMapper">
+
+    <!-- without parameterType attribute -->
+    <insert id="insertUser">
+        insert into users (id, color) values (#{id}, #{color})
+    </insert>
+
+</mapper>

src/test/java/org/apache/ibatis/submitted/enum_interface_type_handler/mybatis-config.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <!--
 
-       Copyright 2009-2017 the original author or authors.
+       Copyright 2009-2019 the original author or authors.
 
        Licensed under the Apache License, Version 2.0 (the "License");
        you may not use this file except in compliance with the License.
@@ -39,5 +39,6 @@
   </environments>
   <mappers>
     <mapper class="org.apache.ibatis.submitted.enum_interface_type_handler.Mapper" />
+    <mapper class="org.apache.ibatis.submitted.enum_interface_type_handler.XmlMapper" />
   </mappers>
 </configuration>

src/test/java/org/apache/ibatis/submitted/enum_with_method/CreateDB.sql

@@ -0,0 +1,25 @@
+--
+--    Copyright 2009-2019 the original author or authors.
+--
+--    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
+--
+--       http://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.
+--
+
+drop table users if exists;
+
+create table users (
+  id int,
+  name varchar(20),
+  cur varchar(20)
+);
+
+insert into users (id, name, cur) values(1, 'User1', 'RMB');

src/test/java/org/apache/ibatis/submitted/enum_with_method/Currency.java

@@ -0,0 +1,37 @@
+/**
+ *    Copyright 2009-2019 the original author or authors.
+ *
+ *    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
+ *
+ *       http://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 org.apache.ibatis.submitted.enum_with_method;
+
+import java.math.BigDecimal;
+
+public enum Currency {
+
+    Dollar {
+        @Override
+        public BigDecimal getExchange() {
+            return null;
+        }
+    },
+
+    RMB {
+        @Override
+        public BigDecimal getExchange() {
+            return null;
+        }
+    };
+
+    public abstract BigDecimal getExchange();
+}

src/test/java/org/apache/ibatis/submitted/enum_with_method/EnumWithMethodTest.java

@@ -0,0 +1,67 @@
+/**
+ *    Copyright 2009-2019 the original author or authors.
+ *
+ *    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
+ *
+ *       http://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 org.apache.ibatis.submitted.enum_with_method;
+
+import java.io.Reader;
+
+import org.apache.ibatis.BaseDataTest;
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+class EnumWithMethodTest {
+
+    private static SqlSessionFactory sqlSessionFactory;
+
+    @BeforeAll
+    static void setUp() throws Exception {
+        // create an SqlSessionFactory
+        try (Reader reader = Resources
+                .getResourceAsReader("org/apache/ibatis/submitted/enum_with_method/mybatis-config.xml")) {
+            sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
+        }
+
+        // populate in-memory database
+        BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
+                "org/apache/ibatis/submitted/enum_with_method/CreateDB.sql");
+    }
+
+    @Test
+    void shouldGetAUser() {
+        try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
+            Mapper mapper = sqlSession.getMapper(Mapper.class);
+            User user = mapper.getUser(1);
+            Assertions.assertEquals("User1", user.getName());
+        }
+    }
+
+    @Test
+    void shouldInsertAUser() {
+        try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
+            Mapper mapper = sqlSession.getMapper(Mapper.class);
+            User user = new User();
+            user.setId(2);
+            user.setName("User2");
+            user.setCur(Currency.Dollar);
+            mapper.insertUser(user);
+        }
+    }
+
+}

src/test/java/org/apache/ibatis/submitted/enum_with_method/Mapper.java

@@ -0,0 +1,24 @@
+/**
+ *    Copyright 2009-2019 the original author or authors.
+ *
+ *    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
+ *
+ *       http://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 org.apache.ibatis.submitted.enum_with_method;
+
+public interface Mapper {
+
+    User getUser(Integer id);
+
+    void insertUser(User user);
+
+}

src/test/java/org/apache/ibatis/submitted/enum_with_method/Mapper.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+       Copyright 2009-2019 the original author or authors.
+
+       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
+
+          http://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.
+
+-->
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+
+<mapper namespace="org.apache.ibatis.submitted.enum_with_method.Mapper">
+
+    <select id="getUser" resultType="org.apache.ibatis.submitted.enum_with_method.User">
+        select *
+        from users
+        where id = #{id}
+    </select>
+
+    <!-- without parameterType="org.apache.ibatis.submitted.enum_with_method.User" -->
+    <insert id="insertUser">
+        insert into users
+        values (#{id}, #{name}, #{cur})
+    </insert>
+
+</mapper>

src/test/java/org/apache/ibatis/submitted/enum_with_method/User.java

@@ -0,0 +1,47 @@
+/**
+ *    Copyright 2009-2019 the original author or authors.
+ *
+ *    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
+ *
+ *       http://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 org.apache.ibatis.submitted.enum_with_method;
+
+public class User {
+
+    private Integer id;
+    private String name;
+    private Currency cur;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Currency getCur() {
+        return cur;
+    }
+
+    public void setCur(Currency cur) {
+        this.cur = cur;
+    }
+}

src/test/java/org/apache/ibatis/submitted/enum_with_method/mybatis-config.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!--
+
+       Copyright 2009-2019 the original author or authors.
+
+       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
+
+          http://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.
+
+-->
+<!DOCTYPE configuration
+    PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
+    "http://mybatis.org/dtd/mybatis-3-config.dtd">
+
+<configuration>
+
+	<environments default="development">
+		<environment id="development">
+			<transactionManager type="JDBC">
+				<property name="" value="" />
+			</transactionManager>
+			<dataSource type="UNPOOLED">
+				<property name="driver" value="org.hsqldb.jdbcDriver" />
+				<property name="url" value="jdbc:hsqldb:mem:enumwithmethod" />
+				<property name="username" value="sa" />
+			</dataSource>
+		</environment>
+	</environments>
+
+	<mappers>
+		<mapper class="org.apache.ibatis.submitted.enum_with_method.Mapper" />
+	</mappers>
+
+</configuration>