How to get the script associated with a StackTrace element in groovy

Suppose I am creating a script in Groovy without creating a class, such as for example:

public int execute() {
  String myString = null;
  return myString.size();
}

If I am setting this Script content in a String and doing:

String myString = "public int execute() {...";
CompilerConfiguration config = new CompilerConfiguration();
config.setTargetByteCode(CompilerConfiguration.JDK8);
GroovyClassLoader groovyLoader = new GroovyClassLoader(getClassLoader(), config);
Class groovyClass = groovyLoader.parseClass(myString);

Then when I am calling my Groovy script I have an exception (here because I am trying to get the size of a null String), and the StackTrace elements will have the following kind of file names: Script_e217abab4c0c685a881796ac61cc4b28.groovy

This is exactly the same String as the groovyClass.getSimpleName() + ".groovy", which allows me to know from which script the StackTrace element is coming. Note that it is not a "real" file name because the script has been created by a String (and not from a file).

Now if I have the following kind of Script:

 public class MyGroovyClass {
    public int execute() {
      String myString = null;
      return myString.size();
    }
 }

In this case groovyClass.getSimpleName() + ".groovy" is MyGroovyClass.groovy but the StackTrace elements have still the same pattern as before, such as Script_e217abab4c0c685a881796ac61cc4b28.groovy for example.

This causes me a problem because I am using a scripting framework (wrapping groovy scripts), where I can call scripts from other scripts. All the scripts are created from Strings because I am modifying the content of the scripts defined in files by the user (kind of instrumentation). When I have a StackTrace, I am not able to know from which script the element is coming if the associated element is a groovy class.

How could I do to get the proper script from the StackTrace element name?

Solution

the stacktrace shows you a file name where class is defined.

for dynamic classes it will show a random file name if you did not set it.

just use the second parameter for parseClass to set a file name
GroovyClassLoader.parseClass(text, fileName)

String myString = "throw new Exception()";
GroovyClassLoader groovyLoader = new GroovyClassLoader(this.getClass().getClassLoader());
Class<Script> groovyClass = groovyLoader.parseClass(myString, "TheNiceFileName.groovy");
Script script = groovyClass.newInstance();
println script.getClass();
script.run();

prints nice class name and throws exception with a nice file name

class TheNiceFileName

java.lang.Exception
    at TheNiceFileName.run(TheNiceFileName.groovy:1)