annotations

问题 If I have a method like this: testLink(@LinkLength(min=0, max=5) List<@LinkRange(min=5, max=9) Integer> link) { ... } How do I get both @LinkLength and @LinkRange annotation? 回答1: I'm assuming you want to reflectively access these annotations. Here's an example: package com.example; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import java.lang.reflect.AnnotatedParameterizedType;

问题 If I have a method like this: testLink(@LinkLength(min=0, max=5) List<@LinkRange(min=5, max=9) Integer> link) { ... } How do I get both @LinkLength and @LinkRange annotation? 回答1: I'm assuming you want to reflectively access these annotations. Here's an example: package com.example; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import java.lang.reflect.AnnotatedParameterizedType;

问题 The question: What is the procedure to implement an annotation. How can, or indeed when can one activate the annotation you developed? I can't seem to find an example or tutorial on how to write a class to implement annotations for dart. For example with Java you might have an annotation that represents a class that is invoked at compile time and let you modify or inject code. Do Dart annotations work like this as well? background I have done some (further) digging on understanding this area

问题 The question: What is the procedure to implement an annotation. How can, or indeed when can one activate the annotation you developed? I can't seem to find an example or tutorial on how to write a class to implement annotations for dart. For example with Java you might have an annotation that represents a class that is invoked at compile time and let you modify or inject code. Do Dart annotations work like this as well? background I have done some (further) digging on understanding this area

问题 I am using podofo for doing PDF operations, like adding annotations, signatures etc as per my requirement in my iOS application. I have first tried the only sample for the podofo library available which works great. But the problem with the sample is the annotations added doesn't show in any preview like Google , Adobe Reader etc. Thats a problem. As per few guideline from Adobe I found that it requires to have Appearance Key for the FreeText annotation to appear. I have tried analyzing raw

问题 I find some answer: https://stackoverflow.com/a/21218921/2754014 about Dependency Injection. There isn't any annotation like @Autowired , @Inject or @Resource . let's assume that there isn't any XML configuration for this example TwoInjectionStyles bean (except simple <context:component-scan base-package="com.example" /> . Is it correct to inject without specify annotation? 回答1: From Spring 4.3 annotations are not required for constructor injection. public class MovieRecommender { private

问题 I'm trying to write a function decorator that uses Python 3.6 type hints to check that a dictionary of arguments respects the type hints and if not raise an error with a clear description of the problem, to be used for HTTP APIs. The problem is that when the function has a parameter using the Union type I can't check a variable against it at runtime. For example, I have this function from typing import Union def bark(myname: str, descr: Union[int, str], mynum: int = 3) -> str: return descr +

问题 I am trying to use AspectJ in a simple project without using Spring, and while I have seen similar questions and my code seems to be correct, I don't understand why it's not working. I'm using Eclipse Oxygen 4.7.3 (not using AJDT tools), JDK 7, maven 3.5.2, and my code is as follows: pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

问题 I am trying to use AspectJ in a simple project without using Spring, and while I have seen similar questions and my code seems to be correct, I don't understand why it's not working. I'm using Eclipse Oxygen 4.7.3 (not using AJDT tools), JDK 7, maven 3.5.2, and my code is as follows: pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

问题 (Using OpenJDK-13 and JUnit5-Jupiter) The problem is that my unit tests each make use of a not-small JUnit annotation system, something like this: @ParameterizedTest @MethodSource("myorg.ccrtest.testlogic.DataProviders#standardDataProvider") @Tags({@Tag("ccr"), @Tag("standard")}) This makes test authoring a little tedious, test code a little long and of course, when a change is needed, it's a chore! Was wondering if I could create my own JUnit annotation: @CcrStandardTest , which would imply