Search readable property when resolving constructor arg type

Should fix #2803

Author: harawata

src/main/java/org/apache/ibatis/builder/MapperBuilderAssistant.java

@@ -437,7 +437,7 @@ private Class<?> resolveResultJavaType(Class<?> resultType, String property, Cla
     if (javaType == null && property != null) {
       try {
         MetaClass metaResultType = MetaClass.forClass(resultType, configuration.getReflectorFactory());
-        javaType = metaResultType.getSetterType(property);
+        javaType = metaResultType.getGetterType(property);
       } catch (Exception e) {
         // ignore, following null check statement will deal with the situation
       }

src/main/java/org/apache/ibatis/mapping/ResultMap.java

@@ -128,8 +128,8 @@ public ResultMap build() {
         final List<String> actualArgNames = argNamesOfMatchingConstructor(constructorArgNames);
         if (actualArgNames == null) {
           throw new BuilderException("Error in result map '" + resultMap.id + "'. Failed to find a constructor in '"
-              + resultMap.getType().getName() + "' by arg names " + constructorArgNames
-              + ". There might be more info in debug log.");
+              + resultMap.getType().getName() + "' with arg names " + constructorArgNames
+              + ". Note that 'javaType' is required when there is no readable property with the same name ('name' is optional, BTW). There might be more info in debug log.");
         }
         resultMap.constructorResultMappings.sort((o1, o2) -> {
           int paramIdx1 = actualArgNames.indexOf(o1.getProperty());

src/test/java/org/apache/ibatis/submitted/record_type/RecordTypeMapper.java

@@ -32,6 +32,12 @@ public interface RecordTypeMapper {
   @Select("select val, id, url from prop where id = #{id}")
   Property selectProperty(int id);
 
+  @Arg(name = "id", column = "id", id = true)
+  @Arg(name = "value", column = "val")
+  @Arg(name = "URL", column = "url")
+  @Select("select val, id, url from prop where id = #{id}")
+  Property selectPropertyNoJavaType(int id);
+
   @Insert("insert into prop (id, val, url) values (#{id}, #{value}, #{URL})")
   int insertProperty(Property property);
 

src/test/java/org/apache/ibatis/submitted/record_type/RecordTypeTest.java

@@ -52,6 +52,16 @@ void testSelectRecord() {
     }
   }
 
+  @Test
+  void shouldResolveConstructorArgType() {
+    try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
+      RecordTypeMapper mapper = sqlSession.getMapper(RecordTypeMapper.class);
+      Property prop = mapper.selectPropertyNoJavaType(1);
+      assertEquals("Val1!", prop.value());
+      assertEquals("https://www.google.com", prop.URL());
+    }
+  }
+
   @Test
   void testSelectRecordAutomapping() {
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {