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So I've got a code:
@Path("/foo") public class Hello { @GET @Produces("text/html") public String getHtml(@Context Request request, @Context HttpServletRequest requestss){ ... } I am using AspectJ to catch all calls to getHtml method. I would like to get parameters passed to @Produces and to @Path in my advice, i.e. "/foo" and "text/html" in this case. How can I do it using reflection ?
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getParameterAnnotations() method of Method class returns a two-dimensional Annotation array, that represents the annotations on the parameters, of the Method object. If the Method contains no parameters, an empty array will be returned.
@interface is used to create your own (custom) Java annotations. Annotations are defined in their own file, just like a Java class or interface. Here is custom Java annotation example: @interface MyAnnotation { String value(); String name(); int age(); String[] newNames(); }
Annotations require constant values and a method parameter is dynamic. Show activity on this post. Annotation Usage: @CacheClear(pathToVersionId = "[0]") public int importByVersionId(Long versionTo){ ...... }
Retention Policy: A retention policy determines at what point an annotation is discarded. It is s specified using Java's built-in annotations: @Retention [About] 1. SOURCE: annotation retained only in the source file and is discarded during compilation.
To get value of the @Path parameter:
String path = Hello.class.getAnnotation(Path.class).value(); Similarly, Once you have hold of Method getHtml
Method m = Hello.class.getMethod("getHtml", ..); String mime = m.getAnnotation(Produces.class).value; If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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