FORGE-2007: Added ClassLoaders.executeIn(URL[] urls, Callable<T> call…

…able)
forge · Sep 11, 2014 · 4e04c59 · 4e04c59
1 parent ca6ec66
commit 4e04c59
Showing 1 changed file with 22 additions and 0 deletions.
diff --git a/container-api/src/main/java/org/jboss/forge/furnace/util/ClassLoaders.java b/container-api/src/main/java/org/jboss/forge/furnace/util/ClassLoaders.java
@@ -6,6 +6,8 @@
  */
 package org.jboss.forge.furnace.util;
 
+import java.net.URL;
+import java.net.URLClassLoader;
 import java.util.concurrent.Callable;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -49,6 +51,26 @@ public static <T> T executeIn(ClassLoader loader, Callable<T> task) throws Excep
       }
    }
 
+   /**
+    * Execute the given {@link Callable} by creating an {@link URLClassLoader} from the given {@link URL} array.
+    * <p/>
+    * Return the result, if any.
+    */
+   public static <T> T executeIn(URL[] urls, Callable<T> callable) throws Exception
+   {
+      ClassLoader savedClassLoader = Thread.currentThread().getContextClassLoader();
+      URLClassLoader newClassLoader = null;
+      try
+      {
+         newClassLoader = new URLClassLoader(urls, savedClassLoader);
+         return executeIn(newClassLoader, callable);
+      }
+      finally
+      {
+         Streams.closeQuietly(newClassLoader);
+      }
+   }
+
    public static boolean containsClass(ClassLoader loader, Class<?> type)
    {
       if (loader == null)