test/testlibrary/jdk/test/lib/Utils.java

*** 21,35 ****
--- 21,39 ----
   * questions.
   */
  
  package jdk.test.lib;
  
+ import java.io.File;
  import static jdk.test.lib.Asserts.assertTrue;
  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.net.InetAddress;
+ import java.net.MalformedURLException;
  import java.net.ServerSocket;
+ import java.net.URL;
+ import java.net.URLClassLoader;
  import java.net.UnknownHostException;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.ArrayList;
*** 48,57 ****
--- 52,66 ----
   * Common library for various test helper functions.
   */
  public final class Utils {
  
      /**
+      * Returns the value of 'test.class.path' system property.
+      */
+     public static final String TEST_CLASS_PATH = System.getProperty("test.class.path", ".");
+ 
+     /**
       * Returns the sequence used by operating system to separate lines.
       */
      public static final String NEW_LINE = System.getProperty("line.separator");
  
      /**
*** 426,431 ****
--- 435,461 ----
       *         system property
       */
      public static long adjustTimeout(long tOut) {
          return Math.round(tOut * Utils.TIMEOUT_FACTOR);
      }
+ 
+     /**
+      * @param parent parent class loader
+      * @return an UrlClassLoader with urls made of the 'test.class.path' jtreg
+      *         property and with the given parent
+      */
+     public static URLClassLoader getTestClassPathURLClassLoader(ClassLoader parent) {
+         URL[] urls = Arrays.stream(TEST_CLASS_PATH.split(File.pathSeparator))
+                 .map(Paths::get)
+                 .map(Path::toUri)
+                 .map(x -> {
+                     try {
+                         return x.toURL();
+                     } catch (MalformedURLException ex) {
+                         throw new Error("Test issue. JTREG property"
+                                 + " 'test.class.path'"
+                                 + " is not defined correctly", ex);
+                     }
+                 }).toArray(URL[]::new);
+         return new URLClassLoader(urls, parent);
+     }
  }