java - Dynamically load jar in groovy -

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i have groovy script createwidget.groovy:

 import com.example.widget   widget w = new widget()

this script runs great when run this:

$ groovy -cp /path/to/widget.jar createwidget.groovy

but, wanted hardcode classpath within script, users not need know is, modified createwidget.groovy follows (which 1 of ways modify classpath in groovy):

this.getclass().classloader.rootloader.addurl(new file("/path/to/widget.jar").tourl())  import com.example.widget  widget w = new widget()

but fails runtime error on import: unable resolve class com.example.widget.

this unorthodox , thinking can't mess rootloader prior import or else?

// use groovy script's classloader add jar file @ runtime. this.class.classloader.rootloader.addurl(new url("/path/to/widget.jar"));  // note: if widget.jar file located in local machine, use following: // def localfile = new file("/path/tolocal/widget.jar"); // this.class.classloader.rootloader.addurl(localfile.touri().tourl());  // then, use class.forname load class. def cls = class.forname("com.example.widget").newinstance();

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