annotations

问题 I have class Person: @Retention(RetentionPolicy.RUNTIME) @interface MaxLength { int length(); } @Retention(RetentionPolicy.RUNTIME) @interface NotNull { } public class Person { private int age; private String name; public Person(int age, String name) { this.age = age; this.name = name; } @NotNull public int getAge() { return this.age; } @MaxLength(length = 3) public String getName() { return this.name; } } Then I'm trying to print annotation values of methods of Peson object. for (Method

问题 I am trying to add multiple pin at the same location. for (int i = 0; i < [arrListing count]; i++) { List *obj = [arrListing objectAtIndex:i]; NSLog(@"Title %@",obj.Title); CLLocationCoordinate2D annotationCoord; annotationCoord.latitude = [obj.lat floatValue]; annotationCoord.longitude = [obj.log floatValue]; MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init]; annotationPoint.coordinate = annotationCoord; annotationPoint.title = obj.Title; [mapView addAnnotation

问题 The code: now = datetime.now() year_ago = now - timedelta(days=365) category_list = Category.objects.annotate(suma = Sum('operation__value')) \ .filter(operation__date__gte = year_ago) \ .annotate(podsuma = Sum('operation__value')) The idea: get sum of each category and sum of one year back. But this code result only filtered objects; suma is equal to podsuma . 回答1: A queryset only produces one query, so all annotations are calculated over the same filtered data set. You'll need to do two

问题 I am trying to write a scanner for custom annotations based on the answer in Scanning Java annotations at runtime. However, to speed up the process, I only want to scan the classes under the main package (package which has the main class and its sub-packages). Figured that the easiest way to determine the package name would be from the main class. The code I am writing would end up in a library which will be used by Spring Boot applications. So I have no way of knowing the name of the main

问题 I want to use the DataAnnotations.DisplayAttribute.Order property to arrange my fields when using the DisplayForModel and EditorForModel methods. Related question: Does the DataAnnotations.DisplayAttribute.Order property not work with ASP.NET MVC 2? I think that I need to use the ASP.NET MVC 2 Futures. But I can't get it to work. How do I install ASP.NET MVC 2 Futures? Why are my fields still out of order? 回答1: Download ASP.NET MVC 2 Futures from CodePlex. Save its files somewhere in the file

问题 Here's my app: public static void main( String[] args ) { AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config.class); //run the importer final ImportNewOrders importer = (ImportNewOrders) ApplicationContextProvider.getApplicationContext().getBean("importNewOrders"); importer.run(); //importer.runInBackground(); } Here's my config: @Configuration @ComponentScan(basePackages = { "com.production" }) @PropertySource(value = { "classpath:/application.properties",

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 12 months ago . I'm reading the error log file and I'm checking if error line refers to the annotation. I tried on the doc without results, but can the annotation (or a custom annotation) throw an exception? Thanks a lot. 回答1: Annotations are not executed, hence they can't throw an exception. 回答2: Annotations

问题 We just upgraded our JBoss from 6.1.0 to Wildfly 10.1, and made a variety of associated upgrades to modules and artifact versions and so on. In one module this caused our cobertura compiles to fail with a compiler error. I found IllegalStateException in Hibernate metamodel generation with maven and upgraded to maven-compiler-plugin 3.6.0 (from 3.1). This seemed to resolve my problem, but only on a local basis. I can compile the module for cobertura, but it turns out to cause a new problem.

问题 I want to overlay text on images on OS X, preferably without installing additional software, so that, as a sysadmin, I can know at a glance that machines are up-to-date, in a way that is easily scriptable and easily modifiable, and can run without GUI access. [Being able to overlay images or apply color-changing effects would be a bonus.] Mac OS X Leopard comes with a ton of stuff built-in: Perl, Python, Ruby, Tcl/Tk, Bash; wxWidgets, some Quartz integration, and even Objective-C integration

问题 I have an Entity called Station . This entity has a property called attributes which is StationAttributes value object. I try to set the property to be StationAttributes : /** * @var StationAttributes * @ORM\Column(name="attributes", type="station_attributes", nullable=true) */ private $attributes; However, the API Platform generates Station model that looks like this: { ... "attributes": "string" } I want it to be like this: { ... "attributes": { "field": true, "field2": "value2", } } How