Understanding java compilation and inheritance -


i'm reading jmh samples , i'm @ section inheritance. here remark made:

because we know type hierarchy during compilation, possible during same compilation session. is, mixing in subclass extending benchmark class after jmh compilation have no effect.

i haven't thought of aspect of compilation , doesn't seem quite clear me. use class::getsuperclass though. example:

@benchmark public abstract class mybenchmark{     public void mb(){         dosome();     }      public abstract dosome(); }

i thought when compiling class jhm uses annotation processor benchmark generation. , if try compile subclass say

public class myconcretebenchmark extends mybenchmark {     @override     public void dosome(){         //do     } }

it has no effect because annotation processor has nothing process.

jhm comes before compiling (analyze , generate). preprocessor or precompiler. therefore jmh can not see inheritance tree , not possible see inherited annotations.

lombock example works in same way. here image demonstrating how works (just replace in mind lombok jmh):

enter image description here

readmore: project lombok: creating custom transformations


Comments

Post a Comment

Popular posts from this blog

iOS: Performance of reloading UIImage(name:...) -

i have tableview , each row has icon. 90% of rows have same icon. in cellforrowatindexpath method load image assets folder this: var cellimage = uiimage(named: "myimage") does pose performance problem? os somehow smart enough it's same image each time? better if loaded image once , saved in class variable , assigned each time? uiimage 's named: api does kind of caching. if @ uiimage's documentation , states: use init(named:in:compatiblewith:) method (or init(named:) method) create image image asset or image file located in app’s main bundle (or other known bundle). because these methods cache image data automatically, recommended images use frequently.
Read more

How to prevent logback from emitting repeated "Empty watch file list. Disabling" messages -

i have logback configured logback.xml located here: http://pastebin.com/kuquekxy . every minute, see log message emitted of form: 18:26:21,486 |-info in reconfigureonchangetask(born:1478715201485) - empty watch file list. disabling why happening , how can rid of these? i can tell why happening, not how rid of them. the reconfigureonchangetask log line when doesn't have files watch. and doesn't have files watch because file in jar, , only watch files on filesystem . makes sense, because files within jar file don't change.
Read more

c# SetCompatibleTextRenderingDefault must be called before the first -

i tried search exception couldn't find solution on case i'am using code below invoke .net application : assembly assem = assembly.load(data); methodinfo method = assem.entrypoint; var o = activator.createinstance(method.declaringtype); method.invoke(o, null); the application invoked has form , in entrypoint of application : [stathread] static void main() { application.enablevisualstyles(); application.setcompatibletextrenderingdefault(false); //exception application.run(new form1()); } setcompatibletextrenderingdefault must called before first iwin32window object created in application. edit : assembly = assembly.load(data); methodinfo method = a.gettype().getmethod("start"); var o = activator.createinstance(method.declaringtype); method.invoke(o, null); you should create new method skips initialization...
Read more