ScriptRunner loadClass question

[C_ Derek Fields]

I have a script structure that might look like this:

scripts/

  my_main_class.groovy

  my_class/

     my_class1.groovy
     my_class2.groovy

From "my_main_class", I want to instantiate either "my_class1" or "my_class2" depending on a variable.

I am trying use the following:

def cname = 'my_class1'
def a = this.getClass().classLoader.loadClass(cname)?.newInstance()

I get a java.lang.ClassNotFoundException: my_class1 error.

Clearly the CLASS_PATH is not finding this class. Does anyone know how to make this work?

I can instantiate the classes normally

import my_class.my_class1
def a = new my_class1()

[C_ Derek Fields · Accepted solution]

Thanks to @Ram Kumar Aravindakshan _Adaptavist_ I relooked at my code and I found that by specifying the complete path, the classloader worked. The corrected code is

def cname = 'my_class.my_class1'
def a = this.getClass().classLoader.loadClass(cname)?.newInstance()

This successfully loads the class.  

[Ram Kumar Aravindakshan _Adaptavist_]

Hi @C_ Derek Fields,

Your import statement is incorrect.

When importing a class, you should only do:-

import my_class.my_class1

You must not add the file extension to the import statement. It should only contain the package name followed by the class name.

Please give it a try and let me know how it goes.

Thank you and Kind regards,

Ram

[C_ Derek Fields]

Thanks - that was a typo when I was creating the sample. My code imports the class correctly. I don't think it has to do with the import statement. I think it has to do with the CLASS_PATH not covering subdirectories.

[Daniel Garcia]

In my experience you can have problems instantiating classes like this. 

if you run this immediately after clear cache the classes won't be compiled

I've also seen issues where expected super class doesn't match super class of instantiated object.

Can I ask, why do you want to do this ?

I started investigating this approach because factories classes caused a big chain of compilation, which caused other problems