Make JarUtil work with custom classloaders

Added the ability for users to set a "resolver" in JarUtil
that lets it find resources that are loaded by a custom classloader.
This is needed in OSGi apps (like Eclipse RCP apps), since OSGi
resources do not have simple jar: URLs (they use a custom
protocol called bundleresource:).

1 files changed, 23 insertions, 1 deletions

diff --git a/src/java/com/jogamp/common/util/JarUtil.java b/src/java/com/jogamp/common/util/JarUtil.java
index 84ec59d..f1488f1 100644
--- a/src/java/com/jogamp/common/util/JarUtil.java
+++ b/src/java/com/jogamp/common/util/JarUtil.java
@@ -53,6 +53,26 @@ public class JarUtil {
     private static final boolean DEBUG = Debug.debug("JarUtil");
 
     /**
+     * This interface allows users to provide an URL resolver that will convert custom classloader
+     * URLs like Eclipse/OSGi "bundleresource:" URLs to normal "jar:" URLs. This is needed when
+     * the classloader has been customized.
+     */
+    public interface Resolver {
+        URL resolve(URL url);
+    }
+
+    /** If non-null, we use this to resolve class file URLs after querying them from the classloader. */
+    private static Resolver resolver;
+    
+    /**
+     * Setter.
+     * @param r Resolver to use after querying class file URLs from the classloader. 
+     */
+    public static void setResolver(Resolver r) {
+        resolver = r;
+    }
+
+    /**
      * Returns <code>true</code> if the Class's <code>"com.jogamp.common.GlueGenVersion"</code>
      * is loaded from a JarFile and hence has a Jar URL like 
      * URL <code>jar:<i>sub_protocol</i>:/some/path/gluegen-rt.jar!/com/jogamp/common/GlueGenVersion.class"</code>.
@@ -92,7 +112,9 @@ public class JarUtil {
         if(null == clazzBinName || null == cl) {
             throw new IllegalArgumentException("null arguments: clazzBinName "+clazzBinName+", cl "+cl);
         }
-        final URL url = IOUtil.getClassURL(clazzBinName, cl);
+        URL url = IOUtil.getClassURL(clazzBinName, cl);
+    	if(resolver != null)
+    		url = resolver.resolve(url);
         // test name ..
         final String urlS = url.toExternalForm();
         if(DEBUG) {