Can clover get code coverage for those classes that get generated dynamically?

[Shankar KC]

Hi,

In our application some JAVA classes are getting generated dynamically. May be this could be a sample http://www.rgagnon.com/javadetails/java-0039.html. In this sample you can see a dynamic method getting executed. Can I get code coverage details for such dynamic method? If yes can you please elaborate ?

Thanks

Shankar KC

[Marek Parfianowicz]

Hi Shankar,

Yes, Clover can measure code coverage for such a dynamically generated class. What you have to do is:

1) Generate source code and store it in a file

In an article linked by you it's being done in lines:

File sourceFile   = new File("/temp/Hello.java");
FileWriter writer = new FileWriter(sourceFile);
...
writer.close();

2) Call CloverInstr tool in order to add Clover code to it

You can either call it from a command line, for instance:

java -cp /path/to/clover.jar com.atlassian.clover.CloverInstr -i path/to/clover.db -d /temp/clover-instr /temp/Hello.java

or directly from code:

import com.atlassian.clover.CloverInstr;

String[] cliArgs =  { 
    "-i", "path/to/clover.db", 
    "-d", "/temp/clover-instr", 
    "/temp/Hello.java" };

int result = CloverInstr.mainImpl(cliArgs);
if (result != 0)    {
    // problem during instrumentation
}

3) Call java compiler on an instrumented file

In our example you'd have to run a JavaCompiler task on the /temp/clover-instr/Hello.java.

Cheers
Marek