According to the Javadoc for Autowired, the annotation can be used on “a constructor, field, setter method or config method”. See the full documentation for more details. I personally prefer your first option (constructor injection), because the myDao field can be marked as final: @Controller public class MyControllear { private final MyDao myDao; @Autowired public … Read more
You should use typing.Mapping instead of collections.abc.Mapping. typing contains many generic versions of various types, which are designed to be used in type hints. According to the mypy documentation, there are some differences between the typing classes and the collections.abc classes, but they’re unclear on exactly what those differences are.
This is an old question, but it seems that the state of annotation processor testing hadn’t gotten any better, so we released Compile Testing today. The best docs are in package-info.java, but the general idea is that there is a fluent API for testing compilation output when run with an annotation processor. For example, ASSERT.about(javaSource()) … Read more
I believe the answer is the same as is given in this question. You can use myBatis Dynamic SQL in your annotations by doing the following: @Select({“<script>”, “SELECT *”, “FROM blog”, “WHERE id IN”, “<foreach item=’item’ index=’index’ collection=’list'”, “open='(‘ separator=”,” close=”)”>”, “#{item}”, “</foreach>”, “</script>”}) List<Blog> selectBlogs(@Param(“list”) int[] ids); The <script> element enables dynamic SQL parsing … Read more
Annotations need to be imported Adding at the top of your file import ‘package:flutter/foundation.dart’; should fix it. Annotations the DartAnalyzer understands are provided by the meta package. To make it easier for Flutter developers, the Flutter team decided to add the meta package to the Flutter SDK and re-export it in flutter/foundation.dart. The annotations by … Read more
In my case, I accidentally typed “;” at the end of @Query. Might help someone else.
You could also check out jsr305. It defines a @CheckReturnValue annotation: import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import javax.annotation.meta.When; @Documented @Target( { ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE, ElementType.PACKAGE }) @Retention(RetentionPolicy.RUNTIME) public @interface CheckReturnValue { When when() default When.ALWAYS; } It’s compatible with findbugs and generates a warning when someone forgets to handle the … Read more
This public final static long TESTNG_TEST_TIMEOUT = 300000; is a constant variable, a type of constant expression. This public final static long TESTNG_TEST_TIMEOUT = TimeUnit.MINUTES.toMillis(5); is not. Annotation members expect constant expressions (and a few other things like enums and Class literals).
@Entity annotation defines that a class can be mapped to a table. And that is it, it is just a marker, like for example Serializable interface. And why @Entity annotation is mandatory? … well, it is the way how JPA is designed. When you create a new entity you have to do at least two … Read more