I am currently a bit annoyed with my IDE, which is complaining about unused methods. These methods are used predominantly by Camel or Spring and not all covered by Unit Tests. I would like to annotate those methods to let my IDE know that they are unused for a reason.
Which annotation is most suitable for this purpose?
Have you tried #SuppressWarnings("unused") ?
Related
I wanted to check the implementation of some annotation in spring, let us say Transactional.
Is there any way to find the defining class where what should happen when an annotation is used, is written?
Based on some experience and reading docs, I know where its implementation is written but I wanted to know any shortcuts or any thought process which can directly take me to that defining class of annotation in the case of Spring AOP mostly.
I am using Intellij Idea with Java.
IntelliJ IDEA has a handy feature to detect unused methods and show them in grey, hinting a potential warning for dead code.
Some methods, however, are not executed directly but via reflection. A good example would be #RequestMapping-annotated methods which are executed by Spring. IntelliJ has decent Spring integration hence it detects this annotation and does not mark such a method as unused.
I have a tiny AJAX framework where I use my own annotation to point which method to execute based on certain HTTP request properties (very similar to what #RequestMapping is doing). Understandably, IntelliJ has no idea what does my annotation stand for and and marks such a method as unused, adding unnecessary noise.
I was thinking of:
annotating my annotation with another annotation, but are there any standard ones that would do the job without any extra effort?
finding a particular setting in IntelliJ to identify custom annotation for marking methods as used, but this would require other team members to do the same, basically a pain.
Can anyone suggest any ideas how to solve this problem?
You can tell IntelliJ to not to warn about used for any method/field annotated with the annotation the "unused" method has.
It should be a quick fix all you have to do is hit <Alt>+<Enter> and select Suppress for methods annotated by ...
You don't need to add anything to you code and you only have to do this once per annotation.
#SuppressWarnings("unused") should work.
#Peter Lawrey s solution did not help in my version of Intellij (14.1.1).
I used the hard way around:Settings-Editor->Inspections->Unused declarion
Now there is an Options point, scroll down to Configure annotations... and you can add your annotation there.
In the "Settings" you can "uncheck" Settings - Inspections - Declaration redundancy - Unused Declaration code inspection.
I have written a Java library that defines and uses a custom annotation to find methods that are then called via reflection.
See this example
#YauaaField("DeviceClass")
public void setDeviceClass(TestRecord record, String value) {
record.deviceClass = value;
}
So IDEs like IntelliJ and probably other code analysis tools will report most of the functions annotated this way as "Unused".
What I would like is an automated way to say that anything that has been annotated with #YauaaField is automatically also annotated with #SuppressWarnings("unused").
I've done quite a bit of googling, read through several online manuals, tutorials and java documentation. Yet I have not yet been able to find how to do that. The annotations do not seem to support 'inheritance' of any kind.
So is what I want even possible?
If not then what other options do I have?
So far I have only found these two ways to suppress these needless warnings:
In IntelliJ I found the manual option to Suppress this warning on all methods annotated with YauaaField. But that is a manual option.
Manually set the #SupressWarnings("unused") on all of those methods/classes.
Is there a better way?
Not entirely automated, but a nice workaround. In IntelliJ you can set up your own Live Template to suggest an autocomplete when typing the annotation:
Does anyone know of an annotation in any framework or library (or IntelliJ or IntelliJ plugin) that can enforce in my code that only specific methods described in the annotation can call it?
example
#caller(class="UsefulClass")
public static void myMethodToBeCalledOnlyByUsefulClass() {
}
The Checker Framework allows you to define annotations such as #Caller and then have the compiler statically enforce programming rules. You could use the Checker Framework to define your #Caller annotation and a compiler plugin. Then, every time you compile your code using the plugin, it will issue an error if the code is used improperly.
The Checker Framework ships with a number of annotations already built in, but not #Caller which you would have to define yourself.
IntelliJ IDEA has a handy feature to detect unused methods and show them in grey, hinting a potential warning for dead code.
Some methods, however, are not executed directly but via reflection. A good example would be #RequestMapping-annotated methods which are executed by Spring. IntelliJ has decent Spring integration hence it detects this annotation and does not mark such a method as unused.
I have a tiny AJAX framework where I use my own annotation to point which method to execute based on certain HTTP request properties (very similar to what #RequestMapping is doing). Understandably, IntelliJ has no idea what does my annotation stand for and and marks such a method as unused, adding unnecessary noise.
I was thinking of:
annotating my annotation with another annotation, but are there any standard ones that would do the job without any extra effort?
finding a particular setting in IntelliJ to identify custom annotation for marking methods as used, but this would require other team members to do the same, basically a pain.
Can anyone suggest any ideas how to solve this problem?
You can tell IntelliJ to not to warn about used for any method/field annotated with the annotation the "unused" method has.
It should be a quick fix all you have to do is hit <Alt>+<Enter> and select Suppress for methods annotated by ...
You don't need to add anything to you code and you only have to do this once per annotation.
#SuppressWarnings("unused") should work.
#Peter Lawrey s solution did not help in my version of Intellij (14.1.1).
I used the hard way around:Settings-Editor->Inspections->Unused declarion
Now there is an Options point, scroll down to Configure annotations... and you can add your annotation there.
In the "Settings" you can "uncheck" Settings - Inspections - Declaration redundancy - Unused Declaration code inspection.