Find in which jar file a class is located.

findJar.groovy

#!/usr/bin/env groovy

import groovy.io.FileType
import java.net.URL
import java.net.URLClassLoader
import java.nio.file.Paths
import java.security.CodeSource
import java.security.ProtectionDomain

def printelnerr = System.err.&println
def appName = this.getClass().getName()

def cli = new CliBuilder( usage:"${appName} --basedir <path_to_dir> --intersectdir <path_to_dir> " )

cli.with {
    b( longOpt: 'basedir', 'path to directory with jars (Original)', args: 1, required: true )
    c( longOpt: 'class', 'class to find', args: 1, required: true )
    h( longOpt: 'help', 'Print help', required: false )
}

def options = cli.parse(args)

if (!options) {
	return
}

if (options.h) { 
	cli.usage()
}

File baseDir = new File( options.b )
println "Basedir: ${baseDir}"

String className = new File( options.c )
className = className.replaceAll( /[\/\\\\]/ , ".")

// Base jars
baseDir.eachFileRecurse( FileType.FILES ) {
    if( it.name.endsWith( '.jar' ) ) {
    	this.class.classLoader.rootLoader.addURL( it.toURI().toURL() )
    }
}

Class clazz = Class.forName( className )
String clazzname = clazz.getName()
ClassLoader classLoader = clazz.getClassLoader()

ProtectionDomain protectionDomain = clazz.getProtectionDomain()
if ( protectionDomain != null ) {

	//println "---> ${protectionDomain.getCodeSource()}"

	CodeSource codeSource = protectionDomain.getCodeSource()
	if ( codeSource != null ) {

    	URL location = codeSource.getLocation()
    	if ( location != null ) {

    		def path =  Paths.get( location.toURI() )
    		println "Path to jar: '${path}'"
    	}
	}
}