Java: Common Annotation for "Not Yet Implemented"

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Is there a common or standard annotation in Java for methods that, while defined, have yet to be implemented?

So that, for instance, if I were using a pre-alpha version of a library that contained something like

@NotImplementedYet
public void awesomeMethodThatTotallyDoesExactlyWhatYouNeed(){ /* TODO */ }

I'd get a compile-time warning when trying to call awesomeMethodThatTotallyDoesExactlyWhatYouNeed?

You might want to use UnsupportedOperationException and detect calls to-yet-to-be-implemented methods when running your tests.

Common annotations for the Java platform, The goal of this specification Annotations are a form of metadata that are generally used to describe, configure, or mark elements (such as class, method, and attribute) of Java code. This lesson explains where annotations can be used, how to apply annotations, what predefined annotation types are available in the Java Platform, Standard Edition (Java SE API), how type annnotations can be used in conjunction with pluggable type systems to write code with stronger type checking, and how to implement repeating annotations.

You could create your own annotation. With the runtime retention policy you can then configure target builds to know to look for this annotation, if necessary.

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({
    ElementType.ANNOTATION_TYPE, 
    ElementType.METHOD, 
    ElementType.CONSTRUCTOR,
    ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface Unimplemented {

    boolean value() default true;
}

Overview of Java Built-in Annotations, In this article, we'll talk about a core feature of the Java language – the default annotations available in the JDK. 2. What an Annotation Is. History. The Java platform has various ad-hoc annotation mechanisms—for example, the transient modifier, or the @deprecated javadoc tag. The Java Specification Request JSR-175 introduced the general-purpose annotation (also known as metadata) facility to the Java Community Process in 2002; it gained approval in September 2004.

Java annotation, In the Java computer programming language, an annotation is a form of syntactic metadata that JSR 250: Common Annotations for the Java Platform � CLI Attributes � Java programming � Java virtual machine � Model-driven architecture� No, there is no standard annotation specifically for methods that have yet to be implemented. However, there is a more general annotation in the JDK that marks an API which developers are discouraged from using, and the Java compiler itself can issue warnings when it is used.

Google guava libraries use the @Beta annotations for API that is likely to change but the methods are implemented though

10 Essential Spring Core Annotations Every Java Developer Should , This is commonly used in the classes which are annotated with @Configuration annotation on the Java-based configuration in Spring. Here is an� An annotation, in the Java computer programming language, is a special form of syntactic metadata that can be added to Java source code. Classes, methods, variables, parameters and packages may be annotated.

Java: Common Annotation for "Not Yet Implemented", You might want to use UnsupportedOperationException and detect calls to-yet-to -be-implemented methods when running your tests. Now, whenever any program would use this method, the compiler would generate a warning. To read more about this annotation, refer this article: Java – @Deprecated annotation. 3) @SuppressWarnings. This annotation instructs compiler to ignore specific warnings.

How well do you actually understand annotations in Java?, I think Annotations are the Java language element that is more commonly not fully understood. Maybe I'm wrong, but that's just my opinion. Java annotations are a very powerful feature in the Java language, but most often, we are the users of standard annotations (such as @Override) or common framework annotations (such as @Autowired

Annotations in Java, For example, we can annotate the return type of a method. These are declared annotated with @Target annotation. JSR 250 is a Java Specification Request with the objective to develop annotations (that is, information about a software program that is not part of the program itself) for common semantic concepts in the Java SE and Java EE platforms that apply across a variety of individual technologies.

Comments
  • Most libraries simply won't expose that method at all. What would be the point?
  • I've encountered it, as a user. Maybe to float the future API as an idea, get users ready for it?
  • You could, of course, create your own "@NotImplementedYet" annotation, and use it however you want: docs.oracle.com/javase/1.5.0/docs/guide/language/…
  • Related: Is there anything like .NET's NotImplementedException in Java?
  • OP is looking for an annotation that will tell the caller at compile time that the method will throw UnsupportedOperationException. As other side creating such an annotation is easy, he is looking for something that is accepted as convention
  • Not exactly the solution requested but better than nothing, and somewhat orthogonal (better in other ways).